communicable diseases and immunizations
Communicable Diseases and Immunizations Overview
An infectious disease is an infection caused by a micro-organism that enters the human body.
Communicable diseases are a subset of infectious diseases, characterized by being:
Contagious
Able to spread from one person to another
Why Communicable Diseases are Especially Important in Pediatrics
Communicable diseases are a significant concern in children due to several factors:
Underdeveloped immune systems.
Frequent interactions in various settings such as:
Daycare
School
Playgroups
Community settings
Health care settings
Behaviors that increase exposure risk:
Hand-to-mouth activity
Poor hygiene habits
Close contact with peers
Inconsistent cough etiquette
Organisms That Can Cause Communicable Diseases
Communicable diseases may be caused by different types of micro-organisms, including:
Bacteria
Viruses
Parasites
Fungi
Protozoa
Why These Diseases Matter
These diseases can lead to a wide range of pediatric health complications, including:
Mild illness
Severe disease
Hospitalization
Long-term disability
Death
Importance of Immunizations
Immunizations are a cornerstone strategy in preventing communicable diseases.
Vaccines are proven effective in reducing the impact of vaccine-preventable diseases.
By adhering to recommended vaccine schedules, healthcare professionals contribute to:
Protecting individual children.
Strengthening community health.
Reducing the spread of contagious diseases.
Improving the resilience of the pediatric population.
Major Nurse Responsibilities Related to Communicable Disease Prevention
The nurse’s role includes:
Preventing infection
Promoting immunizations
Providing client and family education
Caring for ill children
Giving treatments
Offering comfort care
Key Definitions
Infectious Disease: A disease caused by a micro-organism entering and multiplying in the human body.
Communicable Disease: A contagious infectious disease that can be spread from one person to another.
Micro-organism: A microscopic living organism that can cause disease, including bacteria, viruses, fungi, parasites, and protozoa.
Immunization: The process of protecting a person from disease through vaccination.
Vaccine
A biologic preparation that stimulates the immune system to develop protection against a specific disease.
Role of the Nurse in Infection Control in the Pediatric Population
Infection Control Overview
Infection control is a significant component of healthcare practice.
Nurses play a vital role in preventing the spread of infection, particularly in the vulnerable pediatric population.
Why Pediatric Clients Are Vulnerable
Children are more susceptible to infection due to:
Immature immune systems
Hand-to-mouth behaviors
Close contact with other children and adults
Frequent exposure in communal settings
Greater difficulty following hygiene precautions independently
Core Nursing Roles in Infection Control
The nurse acts as:
Advocate
Educator
Implementer of infection-control measures
Assessor
Communicator
Caregiver
These roles help minimize the risk of communicable disease in pediatric clients and support safe healthcare environments.
Nurse as Health Promoter
Nurses participate in health promotion by encouraging habits that strengthen immune function and overall health.
Health promotion areas emphasized by nurses include:
Healthy lifestyle practices
Proper nutrition
Adequate sleep
Infection-prevention behaviors
These measures support the immune systems of pediatric clients and reduce their risk of illness.
Nurse as Policy Advocate
Nurses support infection control at the systems level by advocating for:
Safe policies
Infection-control practices
Proper implementation of prevention standards in healthcare facilities
This means nurses are involved not only in direct care but also in promoting environments that reduce disease spread.
Education and Communication in Infection Control
Nurse as Educator
Nurses educate pediatric clients and families about proper hygiene practices, including:
Handwashing
Cough etiquette
Maintaining a clean environment
Why Education Matters
Education helps families understand:
How infections spread
How to prevent transmission
Why immunizations matter
How to protect the child and others
Benefits of Providing Client Education
Nurses have the opportunity to provide client education at every encounter. Benefits include:
Improving health status.
Encouraging autonomy and decision making.
Promoting healthy lifestyle practices.
Ensuring client safety (especially concerning medications and illness management).
Promoting adherence to prescribed treatment plans.
Reducing anxiety.
Improving outcomes.
Importance in Pediatrics
When parents and caregivers understand how to care for their child, they are more likely to:
Follow treatment plans.
Recognize symptoms early.
Use preventive strategies.
Keep up with vaccines.
Reduce fear and uncertainty.
Hand Hygiene
Nurse as a Role Model
Nurses are expected to:
Consistently practice proper hand hygiene.
Set a positive example for:
Clients
Families
Other healthcare workers
Why Handwashing Is Emphasized
Regular handwashing is a fundamental preventive measure in reducing infection transmission. It helps stop the spread of infectious agents from:
Person to person
Surfaces to person
Healthcare setting to community
Community to healthcare setting
Screening, Assessment, and Immunization Support
Nurses help prevent infectious disease by:
Performing screenings.
Conducting assessments.
Identifying possible infections.
Assisting with immunizations.
Where This Often Occurs
As part of the primary care pediatric team in:
Physician offices
Community clinics
Pediatric practices
Nurses help ensure vaccines are given according to recommended schedules.
Monitoring Immunizations
Nurses are involved in:
Administering vaccines.
Monitoring for adverse reactions.
Maintaining accurate immunization records.
This contributes directly to the prevention of many infectious diseases.
Scope of Practice: PN
The role of the Practical Nurse (PN) includes:
Collecting data during screenings.
Identifying potential infections.
Assisting with the immunization of pediatric clients.
Ensuring vaccines are administered according to the schedule.
Monitoring for adverse reactions.
Maintaining accurate immunization records.
These responsibilities contribute directly to disease prevention.
Helping Children Stay on Schedule with Immunizations
Step 1: Parent Education
Nurses teach parents about:
Importance of vaccines.
Recommended schedule based on age.
Specific vaccines required.
Diseases prevented by vaccines.
Risks of delayed or missed vaccinations.
This helps parents understand that timely immunization protects children from serious illness.
Step 2: Accurate Documentation
Nurses keep careful records of:
Vaccines already received.
Dates given.
Due dates for future doses.
Missed immunizations.
Step 3: Reminder Systems
Nurses may use reminder systems such as:
Electronic health records
Phone calls
Mailed reminders
These reminders help notify parents about:
Upcoming vaccines.
Missed doses.
The need for follow-up.
Nationally Notifiable Diseases
Definition
Nationally notifiable diseases are diseases and conditions that must be reported to the National Notifiable Disease Surveillance System (NNDSS).
Why Reporting Matters
Reporting helps public health officials:
Track disease trends.
Identify outbreaks.
Monitor spread.
Plan public health responses.
Protect the community.
Diseases Listed in This Module as Reportable
COVID-19
Diphtheria
Giardiasis
Haemophilus influenzae
Hepatitis A, B, C
Meningitis
Pertussis
Poliomyelitis
Rubella
Tetanus
Varicella
Precautions in Pediatric Infection Control
Nurses play an important role in ensuring proper precautions are used for pediatric clients, including:
Education
Assessment
Communication
Compassionate care
Implementation of infection-control procedures
These actions help:
Prevent the spread of infection.
Protect pediatric clients.
Protect families and visitors.
Protect staff.
Maintain a safe care environment.
Why Pediatric Clients Are at Higher Infection Risk
Developmental behaviors: At certain developmental stages, children frequently engage in:
Hand-to-mouth behavior
Touching surfaces
Putting toys and objects into their mouths
This increases exposure to infectious agents.
Immature immune system: Because children’s immune systems are still developing, they are less able to fend off some infections.
Healthcare exposure: Pediatric clients may also be at increased risk when:
Many providers enter and exit rooms.
Multiple contacts occur in a clinical environment, and infections are transmitted between rooms or individuals.
Standard Precautions and Transmission-Based Precautions
Two Main Categories of Precautions
Standard precautions
Transmission-based precautions
Standard Precautions
Definition
Standard precautions are used for all clients, regardless of whether infection is known or suspected.
These precautions are based on the idea that the following may contain infectious agents:
Blood
Body secretions
Body excretions (except sweat)
Non-intact skin
Mucous membranes
Key Measures Included in Standard Precautions
Hand hygiene
Use of PPE (Personal Protective Equipment) as needed
Safe injection practices
Prevention of exposure to potentially infectious materials
Personal Protective Equipment (PPE)
Examples of PPE Include:
Gloves
Gowns
Masks
Eye protection
Face shields
Purpose of PPE
PPE protects:
The client
Healthcare workers from exposure to contagious agents.
Transmission-Based Precautions
Definition
Transmission-based precautions are added when a client has a known or suspected infection that spreads through a specific route.
Types
Contact precautions
Droplet precautions
Airborne precautions
The type of precaution used depends on:
The infectious agent
The route of transmission
Important Note
Some infections require more than one type of precaution.
Droplet Precautions
When Used
Droplet precautions are enforced for infections transmitted through:
Close respiratory contact
Mucous membrane contact
Infected respiratory secretions
Important Distance
Transmission typically occurs within less than 3 feet.
Key Characteristics
Organisms do not remain infectious over long distances.
Special ventilation is not required.
Rooming: A single-client room is preferred.
PPE for Health Care Workers
Wear a standard face mask upon entering the room, especially important for close contact within 3 feet.
Transporting the Child
The child should wear a surgical mask if tolerated during transportation, such as for an x-ray.
Examples
Pertussis
Influenza virus
Meningitis
Adenovirus
Rhinovirus
Group A Streptococcus
Contact Precautions
When Used
Used for organisms spread through:
Direct contact with the child.
Indirect contact with the child’s environment (such as surfaces).* Environmental sources may include:
Equipment
Bed controls
Toys
Linens
Rooming
Preferably, a single-client room.
PPE for Health Care Workers
Wear gown and gloves before entering the room.
PPE Removal: Remove all PPE before leaving the child’s room. Discard in the appropriate trash receptacle immediately prior to exit.
Examples of Conditions Requiring Contact Precautions
Excessive wound drainage
Stool contaminated with Clostridium difficile (C. difficile)
Vancomycin-resistant enterococci (VRE)
Methicillin-resistant Staphylococcus aureus (MRSA)
Other bodily fluids
Airborne Precautions
When Used
Airborne precautions are used for organisms that:
Remain suspended in the air.
Can travel long distances.
Are transmitted through airborne particles.
Room Requirements
A negative pressure room is preferred.
PPE for Health Care Workers
Wear an N95 mask or other disease-specific respirator.
Masks must be applied before entering the room.
Examples
Tuberculosis
SARS-CoV
Rubeola virus
Varicella virus
Applying PPE: Correct Sequence
Proper PPE Application Sequence
Hand Hygiene: Perform hand hygiene first. Use soap and water or alcohol-based hand sanitizer.
Gown: Don the isolation gown ensuring full torso coverage.
Mask or Respirator: Put on the mask or respirator, ensuring a snug fit over nose and mouth.
Goggles or Face Shield: Apply eye protection ensuring complete eye coverage.
Gloves: Put on gloves last, ensuring they cover gown cuffs.
Importance of Correct PPE Application
Correct application protects:
Healthcare workers
Clients
Reduces contamination risk
Supports effective infection control
Regular training and standardized protocols ensure proper use.
Contaminated Parts of PPE
After PPE use, certain areas are considered contaminated:
Front of the gown
Sleeves of the gown
Outside of goggles or face shield
Front of the mask or respirator
Careful removal procedures are essential to avoid contamination.
Removing PPE: Correct Sequence
All PPE Must Be Removed in Order:
Remove Gloves First: Place in the appropriate waste receptacle.
Remove Goggles or Face Shield: Remove from the back and lift the headband up and over the head.
Remove Gown: Unfasten the ties, pull the gown away from the neck and shoulders from the inside, turning it inside out as you do so, and discard.
Remove Mask Last: Grasp the bottom ties first, then the top ties. Remove without touching the front, and perform hand hygiene immediately after removal.
Important Note
If hands become contaminated at any time during removal, perform hand hygiene before proceeding to the next step.
Key Terms and Definitions
Infection Control: Practices and procedures used to prevent and reduce the spread of infection.
Infectious Disease: A disease caused by a micro-organism entering the body.
Communicable Disease: An infectious disease that can be transmitted from one person to another.
Immunization: Protection against disease through administration of vaccines.
Vaccine-Preventable Disease: A disease that can be prevented through vaccination.
Hand Hygiene: Cleaning the hands using soap and water or alcohol-based sanitizer to reduce the spread of pathogens.
Standard Precautions: Basic infection-prevention measures used for all clients regardless of diagnosis or infection status.
Transmission-Based Precautions: Additional precautions used for specific infections based on how the organism spreads.
Droplet Precautions: Precautions used for organisms spread through respiratory droplets at close range.
Contact Precautions: Precautions used for organisms spread by direct or indirect contact.
Airborne Precautions: Precautions used for organisms spread through airborne particles that remain suspended and travel long distances.
Personal Protective Equipment (PPE): Protective clothing or equipment used to prevent exposure to infectious material.
Negative Pressure Room: A room designed to keep airborne contaminants from escaping into other areas.
Nationally Notifiable Disease: A disease that must be reported to public health surveillance systems.
Adverse Reaction: An unwanted or harmful response to a medication or vaccine.
High-Yield Takeaways
Communicable diseases are contagious infectious diseases spread from person to person.
Children are especially vulnerable because of:
Immature immune systems
Close contact with others
Hand-to-mouth behaviors
Immunizations are one of the most effective ways to prevent pediatric infectious disease.
Nurses play essential roles as:
Educators
Advocates
Assessors
Record keepers
Infection-control implementers
Hand hygiene is one of the most important infection-prevention strategies.
Standard precautions apply to all clients.
Transmission-based precautions include:
Contact
Droplet
Airborne
PPE must be applied and removed in the correct order to prevent contamination.
Nurses help keep children on schedule with vaccines by:
Educating parents
Tracking vaccine history
Using reminders
Monitoring for reactions.
Certain pediatric infectious diseases are nationally reportable.
Communicable Diseases - Chickenpox (Varicella) Overview
Chickenpox, also called varicella, is a highly contagious viral illness caused by the varicella-zoster virus (VZV).
The primary infection with VZV causes chickenpox, and after recovery, the virus does not fully leave the body. Instead, it becomes latent.
Later in life, the virus can reactivate, causing shingles (herpes zoster).
Pathophysiology
Chickenpox starts when the varicella-zoster virus enters the body, spreading via:
Inhaling aerosolized virus
Direct contact with vesicle fluid
The primary infection occurs in the mucous membranes of the upper respiratory tract.
Within about 2 to 6 days, the virus enters the bloodstream, with a second viremia occurring about 10 to 12 days later during which the characteristic vesicular rash appears.
The body produces:
IgA antibodies
IgM antibodies
IgG antibodies (providing long-term immunity)
After the initial infection, the virus remains dormant in the sensory nerves and can later reactivate as herpes zoster (shingles).
Etiology and Risk Factors
Caused by varicella-zoster virus (VZV), which spreads through:
Aerosolized respiratory secretions
Contact with fluid from open vesicles
Chickenpox is extremely contagious, allowing rapid spread, particularly with exposure to infected individuals, especially those with active vesicles.
Clinical Presentation
Characteristic manifestation includes a skin rash with small, itchy blisters that eventually crust over, beginning on the chest and spreading:
To the back
To the face
Then to other areas such as:
Mouth
Eyelids
Genitals
Scalp
Other manifestations may include:
Fever
Fatigue
Sore throat
Headache
Symptoms typically last about 5 to 7 days.
Lab Testing and Diagnostic Studies
Diagnosis is generally based on clinical manifestations.
Chickenpox confirmation can be done by:
Taking a sample of vesicle fluid
Scraping crust from a scabbed vesicle
Blood sample to identify evidence of an acute immune response.
Treatment
Treatment is mainly supportive; antibiotics are ineffective as chickenpox is viral.
Management includes:
Acetaminophen for fever
Analgesics for discomfort
Avoid aspirin due to the risk of Reye syndrome.
Pruritus treatment can involve:
Calamine lotion
Soothing oatmeal baths
Antihistamines (oral or topical)
Hydration is crucial, especially if oral sores cause discomfort.
High-risk clients (e.g., immunocompromised children) may receive antiviral treatment under provider supervision.
Monitoring for complications like secondary bacterial skin infections is essential.
Medication: Diphenhydramine
Class: Antihistamine
Action: Blocks histamines at H1-receptor sites.
Therapeutic Use: Reduces excess histamine manifestations (e.g., pruritus, rhinorrhea, sneezing).
Adverse Effects: Drowsiness, dry mouth, hypotension, dizziness.
Interactions: Avoid use with other diphenhydramine products.
Contraindication: Hypersensitivity to previous doses.
Client Teaching: Can be given without regard to meals.
Nursing Interventions: Comfort Care for the Client
Comfort care aims to relieve itching, reduce fever, maintain hydration, and promote rest. Interventions include:
Applying calamine lotion
Giving over-the-counter antihistamines if appropriate
Providing frequent lukewarm baths with colloidal oatmeal or baking soda
Dressing the child in lightweight cotton clothing
Avoiding overheating with heavy blankets
Trimming fingernails short to mitigate scratching and reduce secondary bacterial infection risks.
Hydration support, encouraging water, oral rehydration solutions, and ice pops, is crucial.
Home isolation is required until all blisters crust over (usually about 1 week).
Protect from exposure to pregnant individuals, newborns, and immunocompromised persons.
Hospital Precautions: Enforce airborne and contact precautions until all lesions crusted. Place in a negative-air-flow room or a private room with a closed door. Staff caring for the child should already have immunity. Pregnant nurses shouldn't care for children with chickenpox.
Prevention
The best prevention is through varicella vaccination. The vaccine is:
Safe
Highly effective
Reduces incidence and severity
Children typically receive two doses during childhood; this immunization is vital for those without prior chickenpox and those at high risk of complications. Vaccination also protects the community by decreasing spread.
Additional preventive strategies:
Frequent handwashing
Avoiding close contact with infected people.
Key Terms
Viremia: Presence of viruses in the bloodstream, allowing spread throughout the body.
Pruritus: Itching.
Rhinorrhea: Mucous secretion from the nose.
Latent: Present but inactive/dormant in the body.
Vesicle: Small fluid-filled blister.
Herpes zoster: Reactivation of varicella-zoster virus causing shingles.
Diphtheria Overview
Diphtheria is a bacterial infection caused by Corynebacterium diphtheriae.
It primarily affects the respiratory system but can also affect the integumentary system.
The disease is dangerous because the bacteria produce toxins leading to airway obstruction and systemic complications.
Pathophysiology
Corynebacterium diphtheriae is:
Nonencapsulated
Gram-positive
Bacillus
It produces exotoxins that lead to:
Throat inflammation.
Formation of a gray pseudomembrane in the throat and pharynx that can obstruct airflow as it thickens.
The toxins can also spread via:
Lymphatic system
Bloodstream, potentially causing systemic complications like myocarditis and neuritis.
Etiology and Risk Factors
Caused by Corynebacterium diphtheriae, with humans as the only host.
The organism resides in the upper respiratory tract. It transmits by inhaling airborne particles and can also spread from asymptomatic carriers.
Major risk factors include:
Lack of routine DTaP immunizations
Lower socioeconomic status
Crowded living conditions
Non-immunized status
Travel to endemic areas
Underlying health conditions
More commonly seen in tropical regions, Southeast Asia, and parts of Africa.
Clinical Presentation
Early symptoms resemble the flu, including:
Sore throat
Fever
Malaise
Headache
Cervical lymphadenopathy.
Hallmark finding: A thick, gray pseudomembrane covering the throat and tonsils, with your incubation period lasting usually 2 to 5 days (can range from 1 to 10 days).
Most severe manifestations relate to the respiratory tract, starting from mild throat redness and possibly leading to severe airway obstruction.
Lab Testing and Diagnostic Studies
Throat swabs for bacterial cultures and microbiologic analysis are collected, and PCR testing provides rapid detection. Toxin testing determines if the bacteria produce diphtheria toxin, requiring both identification and confirmation.
Treatment
Includes:
Isolation
Antibiotics
Diphtheria antitoxin (DAT) to neutralize circulating toxins.
Clients with unknown immunization status receive a booster diphtheria toxoid.
Before administering DAT, assess for hypersensitivity and have emergency treatment available for anaphylaxis.
Antibiotics should be initiated as soon as possible; common choices:
Erythromycin
Penicillin G
If resistant, Vancomycin or Linezolid may be used.
Medication: Penicillin G (Parenteral/Aqueous)
Class: Antibiotic
Action: Interferes with bacterial cell wall synthesis causing bacterial cell death.
Therapeutic Use: Treat bacterial infections like diphtheria.
Adverse Effects: Clostridium-difficile-associated diarrhea, hypersensitivity reactions, rash, angioedema.
Interactions: IV only; interactions noted with cholera vaccine.
Contraindications: Hypersensitivity to penicillin or cephalosporins.
Client Teaching: Monitor stools for frequency and blood; notify provider if diarrhea or blood is present.
Nursing Interventions: Comfort Care for the Client
Hospitalization often required due to respiratory and cardiac complication risks. Comfort interventions include:
Soft diet
Plenty of fluids
Calm, quiet environment
Rest promotion
Fever control with acetaminophen
Emotional support from parents and healthcare professionals, with distractions such as reading or games.
Infection control measures are crucial, with close contacts possibly needing immunization.
Medication: Acetaminophen
Class: Antipyretic, non-opioid analgesic
Action: Inhibits synthesis of prostaglandins mediating pain and fever.
Therapeutic Use: Reduces fever and pain.
Adverse Effects: Hearing loss, erythema, skin rash, hepatotoxicity.
Interactions: Avoid with other acetaminophen-based products.
Contraindications: Hypersensitivity, severe hepatic impairment.
Client Teaching: Measure oral liquid with calibrated spoon/dropper, do not exceed 5 doses in 24 hours, contact provider if symptoms do not improve after 3 days.
Prevention
Preventable through routine DTaP vaccination, which combines:
Diphtheria
Tetanus toxoid
Acellular pertussis
Disease rates decreased significantly after widespread vaccination.
Key Terms
Exotoxins: Toxic peptides secreted mainly by gram-positive bacteria.
Lymphadenopathy: Enlarged lymph nodes.
Pseudomembrane: Thick false membrane that forms over mucous membranes.
Myocarditis: Inflammation of heart muscle.
Neuritis: Inflammation of nerves.
Mumps Overview
Mumps is a viral infection caused by a virus in the Paramyxoviridae family, best known for swelling the salivary glands, especially the parotid glands.
Pathophysiology
Mumps is caused by a single-stranded RNA paramyxovirus. Primary replication occurs in the upper airway mucosal lining and regional lymph nodes before viremia occurs, causing inflammation in salivary glands, testes, ovaries, and occasionally the CNS.
Etiology and Risk Factors
Humans are the only natural host, with an incubation period of 7 to 21 days. Contagion occurs about 1 to 2 days before symptoms appear and lasts for about 5 days after symptoms begin. Spread occurs via respiratory droplets and direct contact with infected saliva, with crowded settings like schools and dormitories increasing risk.
Clinical Presentation
Hallmark manifestation includes swelling of one or more salivary glands, primarily the parotid glands. Other symptoms may include:
Fever
Headache
Anorexia
Myalgia
Fatigue
Potential complications involve orchitis, meningitis, and encephalitis.
Lab Testing and Diagnostic Studies
Diagnosis relies on exposure history and clinical findings, confirmed through RT-PCR viral culture from a buccal swab or IgM serology.
Treatment
There is no specific antiviral treatment; management is supportive, focusing on rest, hydration, pain relief, hot/cold compresses for parotitis, and cold compress with elevation for orchitis. OTC analgesics are recommended.
Nursing Interventions: Comfort Care for the Client
Encourage rest, maintain hydration, use cloth-wrapped cold compresses for swollen glands, offer a soft diet, isolate the child until the contagious period passes, and monitor closely for complications. Support and comfort from family and staff are also crucial.
Prevention
Routine MMR immunization is essential, especially during outbreaks where isolation and public health vaccination campaigns may be necessary.
Key Terms
Orchitis: Inflammation of one or both testicles.
Fomites: Objects in the environment that can carry infectious material.
Parotitis: Inflammation of the parotid gland.
Anorexia: Loss of appetite.
Myalgia: Muscle pain.
Measles (Rubeola) Overview
Measles, or rubeola, is a highly contagious, vaccine-preventable viral illness characterized by fever and rash, capable of causing immunosuppression and increasing morbidity/mortality.
Pathophysiology
Caused by Morbillivirus hominis, entering through nasopharyngeal and conjunctival mucosa. The virus affects regional lymph nodes, spreading throughout the body to lymphoreticular cells in major organs (e.g., the spleen, liver, bone marrow), leading to general replication and immune system suppression.
Etiology and Risk Factors
Incubation period is 10 to 14 days, spread through direct contact with saliva or respiratory droplets, remaining in the air for up to 2 hours. Mostly impacts unvaccinated children.
Clinical Presentation
Early symptoms include:
Fever
Cough
Rhinorrhea
Conjunctivitis
Followed by Koplik spots, with a rash beginning at the hairline and spreading downwards (pink with slight variations based on skin type).
Lab Testing and Diagnostic Studies
Diagnosis is often based on clinical presentation, with lab confirmation via serologic tests or PCR assays; the plaque reduction neutralization assay is the most accurate.
Treatment
There’s no antiviral treatment; only supportive care, with airborne precautions if hospitalized. Focus on adequate nutrition, hydration, and vitamin A supplementation.
Nursing Interventions: Comfort Care for the Client
Provide comfort, address fever, manage respiratory symptoms, promote rest and hydration, and monitor for complications.
Prevention
Centered on MMR vaccination for herd immunity; outbreaks occur during vaccine hesitancy or insufficient coverage, necessitating public health responses like case identification, isolation, contact tracing, and vaccination campaigns.
Key Terms
Koplik spots: Small red spots with white centers in the mouth, indicative of measles.
Herd immunity: Community protection from infection due to sufficient immune population presence.
Prodromal phase: Early disease stage prior to characteristic symptoms.
Conjunctivitis: Inflammation of the conjunctiva.
Poliomyelitis (Polio) Overview
Polio, caused by an enterovirus, ranges from mild illness to severe neurological damage and paralysis.
Pathophysiology
The virus enters through the mouth, replicating in the oropharynx and gastrointestinal tract, then spreading to nasopharyngeal secretions and stool for weeks post-infection. Severe cases lead to paralysis through motor neuron attacks.
Etiology and Risk Factors
Before vaccination, polio was endemic; the last US case was in 1979. Virus can still be imported; high-risk groups include infants, young children, and immunocompromised individuals, especially unvaccinated ones.
Clinical Presentation
Most infections manifest mild flu-like symptoms, whereas a minority progress to CNS involvement with:
Muscle weakness or paralysis (often in legs)
Severe cases leading to respiratory failure.
Lab Testing and Diagnostic Studies
Diagnosis entails clinical examinations for weakness or paralysis, with samples taken from the throat, stool, or cerebrospinal fluid (CSF) identifying polio virus presence.
Treatment
There’s no specific cure; supportive care varies in intervention requirement based on severity, with physical therapy and hydration support as primary focuses.
Nursing Interventions: Comfort Care for the Client
If hospitalized or suspected of having polio, place clients on contact precautions with essential supportive care for rest, balanced diet, physical therapy, and potential respiratory support.
Prevention
Routine immunization with IPV (inactivated polio vaccine) is key, contributing to significant infection rate reductions. Global eradication efforts continually progress toward reducing polio incidences.
Key Terms
Paralysis: Loss of muscle function.
Motor neurons: Nerve cells controlling muscle movement.
EMG (electromyography): Test evaluating muscle and nerve function.
IPV: Inactivated polio vaccine.
OPV: Oral polio vaccine.
SARS-CoV-2 (COVID-19) Overview
COVID-19 is caused by SARS-CoV-2, showing milder manifestations in children but still presenting severe outcomes.
Pathophysiology
SARS-CoV-2 can affect multiple body systems. Following entry, viral replication leads to tissue damage and involves:
T-lymphocytes
Monocytes
Neutrophils
Cytokines.
Severe cases can involve excessive cytokine response, resulting in systemic inflammation.
Etiology and Risk Factors
The virus spreads primarily through direct and respiratory droplets, with analyzes showing fecal-oral transmission potential in children.
Clinical Presentation
Children may exhibit:
Fever
Cough
Respiratory symptoms, often asymptomatic or mild.
A major concern is MIS-C, which occurs weeks after infestation, leading to organ inflammation.
Other long-term issues may arise like Long COVID or PASC with lingering symptoms of fatigue and respiratory problems.
Lab Testing and Diagnostic Studies
Diagnostic tools include:
PCR testing
Rapid antigen testing, typically via nasopharyngeal swab.
Treatment
Supportive care is the standard, with severe cases requiring respiratory support. NIH recommendations provide antiviral options based on age/writing weight:
Ritonavir-boosted nirmatrelvir for nonhospitalized children aged 12+ weighing at least 40 kg (88 lb).
Remdesivir for hospitalized children requiring supplemental oxygen, approved for those 28 days old and above.
Medication: Remdesivir
Class: Antiviral
Action: Inhibits SARS-CoV-2 RNA-dependent RNA polymerase.
Therapeutic Use: Manages COVID-19 in hospitalized clients.
Adverse Effects: Rash, nausea, anaphylaxis, elevated liver function tests, hypotension, and bradycardia.
Interactions: Hydroxychloroquine and chloroquine should be avoided.
Nursing Interventions
Monitor vital signs, manage respiratory symptoms, ensure hydration, and hospitalize if severe.
Interventions may require oxygen therapy or mechanical ventilation.
Comfort Care for the Client
Create a restful environment, encourage fluid and nourishing meal access, OTC meds may be administered for symptom management, while ensuring isolation procedures.
Prevention
Children can still transmit the virus. CDC recommends:
Returning to normal activities as symptoms improve, being fever-free for 24 hours without fever-reducing meds.
Hand hygiene practices, masking in high-risk settings, and vaccination guidance based on age/immune status.
Key Terms
MIS-C: Multisystem inflammatory syndrome in children.
PASC: Post-acute sequelae of SARS-CoV-2 infection; long COVID.
Cytokines: Immune signaling molecules.
Nasopharyngeal swab: Sample from upper throat behind the nose.
Meningitis
Viral Meningitis Overview
Viral meningitis, or aseptic meningitis, is usually self-limiting but can seriously impact newborns, children younger than 5, and immunocompromised individuals.
Etiology and Risk Factors
Common causes include enteroviruses (e.g., Coxsackie, echovirus), herpesviruses, and adenoviruses, entering via the mouth/nose.
Spread occurs via direct/indirect contact with infected secretions, with increased risk seen in crowded settings during summer/fall.
Clinical Presentation
Symptoms occur due to inflammation of the meninges and increased intracranial pressure, with presentation varying by age:
Infants and young children: Fever, irritability, vomiting, lethargy, full or bulging anterior fontanel.
Older children and adolescents: Fever, nausea, photophobia, headache, nuchal rigidity, irritability, and diplopia.
Viral meningitis generally presents milder courses than bacterial meningitis.
Lab Testing and Diagnostic Studies
Diagnosis is based on clinical symptoms, with lumbar puncture needed for:
CSF analysis to identify the viral pathogen.
Treatment
Due to symptom similarities (viral/bacterial), lumbar puncture is critical and empirical antibiotics may be started until bacterial meningitis is ruled out.
Nursing Interventions
Assist with diagnostic assessments while monitoring hydration and potential complications. Comfort measures include:
Managing fever/discomfort with weight-based antipyretics/NSAIDs.
Utilize cool compresses for fever management.
Prevention
Good hygiene practices and thorough handwashing to limit contact with infected individuals.
Key Terms
Aseptic meningitis: Viral meningitis.
Photophobia: Sensitivity to light.
Nuchal rigidity: Neck stiffness.
Diplopia: Double vision.
Bacterial Meningitis Overview
Bacterial meningitis is a serious, potentially life-threatening infection of the meninges, usually more severe than viral meningitis and can rapidly result in complications such as sepsis, hearing loss, hydrocephalus, and death.
Etiology and Risk Factors
Common pathogens are Neisseria meningitidis, Streptococcus pneumoniae, and Group B Streptococcus, with transmission through respiratory droplets and saliva.
Risk factors include close contact with infected individuals, communal living, and being unvaccinated.
Clinical Presentation
Presents similarly to viral meningitis but with onset severity differences. Notable findings may include:
Petechial rash with meningococcal infection, positive Brudzinski and Kernig signs are critical for diagnosis.
Lab Testing and Diagnostic Studies
Diagnosis necessitates a lumbar puncture for CSF analysis to determine infection and severity, including CBC and blood cultures.
Treatment
Requires prompt hospitalization with immediate IV antibiotics and supportive care to manage both fever and hydration levels.
Prophylactic antibiotics for close contacts during outbreaks are indicated.
Nursing Interventions
Prioritize safety through constant monitoring of vital signs, hydration levels, and neurologic status while maintaining droplet precautions.
Prevention
Vaccination is crucial against major pathogens, with developmental awareness aiding in prevention strategies against respiratory infections.
Key Terms
Brudzinski sign: Passive neck flexion leading to involuntary knee flexion.
Kernig sign: Pain/resistance when extending the knee with hips flexed.
Petechial rash: Pinpoint red/purple spots due to bleeding under the skin.
High-Yield Comparison: Viral vs. Bacterial Meningitis
Viral:
Generally milder.
Often self-limiting.
May still be serious for newborns/immunocompromised.
Droplet precautions initially.
Bacterial:
More severe.
Rapid progression possible.
Risk for serious conditions including death.
Requires urgent IV treatments.
Master Key Terms and Definitions
General Infectious Disease Terms:
Aerosolized virus: Suspended virus in tiny airborne particles.
Viremia: Virus in the bloodstream.
Latent: Inactive but still present.
Contagious: Capable of spreading from person to person.
Incubation period: Time between exposure and symptoms onset.
Manifestations: Signs/symptoms of diseases.
Prodromal phase: Early symptoms before major disease signs appear.
Immunocompromised: Having a weakened immune function.
Supportive care terms:
Antipyretic: Drug that mitigates fever.
Analgesic: Drug for pain relief.
Antiviral: Drug that inhibits viral replication.
Antibiotic: Drug treating bacterial infections.
PCR: Test detecting pathogen genetic material.
Serology: Blood test examining antibodies.
Prophylaxis: Preventive treatment measures used.