Infection Terms Quiz 2

Portal of Entry

The specific route or "doorway" (such as the nose, mouth, or a break in the skin) through which a pathogen enters the host's body.

Aerosol Transmission

The spread of pathogens via very small particles (nuclei) that remain suspended in the air for long periods and can be inhaled over a distance.

Broad Spectrum vs. Narrow Spectrum Antimicrobials

effective against a wide range of diverse microbes (e.g., both Gram-positive and Gram-negative bacteria)vs. target only a specific group or family of microbes.

Mixed Infections

An infection caused by several different types of microbes establishing themselves at the same site simultaneously.

Subclinical Infections

An infection that does not produce any apparent clinical symptoms, though the individual may still be a carrier.

Leukopenia

A condition characterized by an abnormally low total count of white blood cells in the blood.

Portal of Exit

The route by which a pathogen leaves an infected host (such as through sneezing, coughing, feces, or blood) to reach a new host.

Host Resistance

The ability of an individual’s body to resist a specific disease through physical barriers and immune system responses.

First Generation vs. Second Generation Antimicrobials

original version of a drugvs.

a newer, chemically modified version of that same drug, usually designed to be more effective or resist bacterial enzymes.

Primary Infections

The initial infection that develops in a previously healthy individual.

Prodromal Period

The short stage following incubation where the patient begins to feel "off" with vague, general symptoms like fatigue or headache before specific symptoms appear.

Neutropenia

A specific type of leukopenia characterized by an abnormally low number of neutrophils, the body's primary "first-responder" white blood cells.

Direct Contact

Disease transmission through physical touch between an infected person and a susceptible host (e.g., skin-to-skin contact).

Antiseptics

Chemical agents applied to living tissue (like skin or mucous membranes) to destroy or inhibit the growth of pathogens.

Local Infection

An infection that is confined to a small, specific area of the body.

Secondary Infections

A second infection that occurs during or immediately after the treatment of a primary infection, often because the immune system has been weakened.

Incubation Period

The time interval between the initial exposure to a pathogen and the first appearance of any signs or symptoms.

Arthralgia

Pain in one or more joints, often a common symptom of systemic viral infections.

Indirect Contact

Transmission of a pathogen via an inanimate object, known as a fomite (e.g., a contaminated doorknob, towel, or needle).

Autoclaving

A method of sterilization using pressurized steam (typically at 121°C) to kill all forms of microbial life, including highly resistant spores.

Focal Infection

An infection that starts in a localized area but spreads pathogens or toxins to other specific parts of the body.

Acute Infections

Infections that appear suddenly, have severe symptoms, and typically last for a short duration.

Septicemia

A systemic condition caused by the multiplication of pathogens (usually bacteria) in the blood; also known as "blood poisoning."

Leukocytosis

An increase in the number of white blood cells in the blood, usually indicating an active infection or inflammatory response.

Droplet Transmission

The spread of pathogens through large respiratory droplets that travel only short distances (usually less than 1 meter) after coughing or sneezing.

Bactericidal vs. Bacteriostatic Antimicrobials

agents kill bacteria directly vs. agents inhibit the growth and reproduction of bacteria, relying on the host's immune system to eliminate the remaining pathogens.

Systemic Infection

An infection that has spread throughout the body, usually via the bloodstream or lymphatic system.

Chronic Infections

Infections that develop slowly, persist over a long period, and often have less severe symptoms than acute infections.

Lymphadenopathy

The swelling or enlargement of the lymph nodes, frequently occurring as a response to infection or inflammation.