Agricultural Animal Health Care: Drug Control, Housing, and Biosecurity

What is the role of FARAD in veterinary medicine?

FARAD provides information on over-the-counter products, alerts for veterinary assistance with prescription drugs, and estimates of meat and milk withdrawal times for extra-label drug use.

What are the key storage conditions for pharmaceuticals intended for food-producing animals?

Pharmaceuticals should be stored in a clean, dry area protected from temperature changes, sunlight, dust, moisture, and vermin.

What should be done with damaged pharmaceutical containers?

Damaged containers or those with missing or illegible labels should be disposed of properly.

Why is record-keeping important in the use of pharmaceuticals for food animals?

Record-keeping ensures compliance with label directions, confirms that drugs are not outdated, and maintains records of use and disposal.

What is the minimum duration for maintaining records of pharmaceutical use?

Records should be maintained for at least 2 years or in accordance with state and federal requirements.

What does extra-label drug use (ELDU) entail?

ELDU involves using different dosages, formulations, or routes of administration not specifically mentioned on the product label.

What are the major principles guiding extra-label drug use (ELDU)?

1) Valid veterinarian-client-patient relationship (VCPR); 2) ELDU in feed is illegal; 3) The compound must be FDA-manufactured; 4) Records of ELDU must be maintained for 2 years; 5) Adequate safety margin in withdrawal time.

What must be done before processing meat, eggs, or milk from animals given investigational drugs?

Authorization must be granted by the FDA or USDA, and an appropriate INAD exemption must be obtained.

What is the USDA National Organic Program's stance on treating sick animals?

Producers must not withhold medical treatment from sick animals to preserve organic status; all appropriate medications must be used.

What types of chemicals can lead to residues in animal products?

Pesticides, herbicides, rodent poisons, wood preservatives, and disinfectants can result in residues in meat, milk, or eggs.

What is the purpose of physical restraint in agricultural animal care?

Physical restraint is used to restrict an animal's movements for examination, sample collection, drug administration, or other clinical procedures.

What devices can be used for physical restraint of agricultural animals?

Devices include stocks, head gates, stanchions, halters, squeeze chutes, and snares.

What should be considered when using restraint devices on animals?

Devices should be suitable in size and design for the animal and operated properly to minimize stress and avoid pain and injury.

What is the significance of the Animal Medicinal Drug Use Clarification Act (AMDUCA) of 1994?

AMDUCA regulates extra-label drug use in veterinary medicine to ensure animal health and safety.

What should personnel be informed about regarding hazardous chemicals?

Personnel must be informed of potential hazards and required to wear appropriate protective equipment.

What is the recommended method for disposing of animal products treated with investigational drugs?

Disposal methods may include incineration, burial, or other procedures ensuring safety and sanitation.

What is the importance of segregating pharmaceuticals by indicated use?

Segregation reduces the chance of treatment errors and ensures proper use according to age or production state of the animals.

What changes occurred regarding the marketing status of medically important antimicrobials in 2016?

The marketing status changed from over-the-counter (OTC) to prescription (Rx) or veterinary feed directive (VFD).

What should be done if an animal is treated with a drug not specifically labeled for its condition?

A licensed veterinarian may consider ELDU if the animal's health is immediately threatened.

What is the purpose of evaluating the integrity of product containers?

To assess for potential leakage or contamination of stored pharmaceuticals.

What is the recommended action if a pharmaceutical product is outdated?

Outdated products should be disposed of properly to prevent use.

What is the significance of the FDA in the context of extra-label drug use?

The FDA regulates ELDU and ensures that it adheres to safety and health standards.

What is the role of the veterinarian in managing extra-label drug use?

The veterinarian must ensure a valid VCPR and maintain records of ELDU for compliance.

What is the purpose of training personnel on hydraulically operated restraint devices?

To prevent potential injury to animals.

What does prolonged physical restraint involve?

Restriction of normal animal movements for an extended period, typically hours or days.

How should animals be conditioned to restraint equipment?

Through a gradual process, increasing the time of restraint on each occasion.

Who must review and approve extended physical restraint protocols?

The Institutional Animal Care and Use Committee (IACUC).

What should be used when compatible with protocol objectives instead of restrictive systems?

Less restrictive systems that do not limit an animal's ability to make normal postural adjustments.

What is euthanasia?

A method of killing that minimizes pain, distress, and anxiety experienced by the animal before loss of consciousness.

What guidelines should euthanasia protocols follow?

The American Veterinary Medical Association (AVMA) Guidelines for the Euthanasia of Animals.

What must be ensured when performing euthanasia?

That death has occurred, confirmed by criteria such as lack of pulse and breathing.

Who is authorized to perform euthanasia?

Trained personnel in accordance with applicable regulations and policies.

What is the purpose of the AVMA Guidelines for the Humane Slaughter of Animals?

To outline procedures for the humane treatment of livestock before and during slaughter.

What must be accessible to livestock at all times in holding pens?

Water.

What does depopulation refer to?

The rapid destruction of a population of animals in response to urgent circumstances.

What is essential for the welfare of animals in research and teaching?

Proper management and sound animal husbandry.

What are the two types of environments agricultural animals may be kept in?

Extensive environments (e.g., pasture) and intensive environments (e.g., pens or cages).

What factors influence animal well-being?

Environmental variables such as physical surroundings, nutritional intake, and social interactions.

What is the difference between macroenvironment and microenvironment?

Macroenvironment includes the overall physical conditions, while microenvironment refers to the immediate surroundings.

What should be managed to minimize stress and illness in animals?

Environmental conditions including temperature, humidity, light, and space.

What should be considered when accommodating different genetic strains of animals?

Their specific needs and the purpose for which they are being used.

What should be available to personnel performing euthanasia?

All equipment and materials required to perform the procedure.

What is the role of the program veterinarian in euthanasia procedures?

To ensure that all personnel have demonstrated proficiency in the techniques selected.

What is the importance of training personnel in euthanasia techniques?

To ensure the technique is performed humanely and effectively.

What should be done to confirm death after euthanasia?

Use a combination of criteria including lack of pulse, breathing, and rigor mortis.

What must be done with protocols for euthanasia?

They should be made available to all personnel who euthanize animals.

What is the significance of the AVMA guidelines?

They are considered the primary standard for euthanasia practices.

What should be done when animals are exposed to extreme weather events?

Ensure that animals have access to shelter.

What is the goal of sound animal husbandry?

To provide systems of care that allow animals to grow, mature, reproduce, and be healthy.

What should be provided if trees or geographic features do not offer enough protection for animals?

Artificial shelters, windbreaks, or sunshades.

What are some methods to combat heat stress in animals?

Direct wetting, evaporative cooling, and providing fans.

What are clear signs that cattle are experiencing heat stress?

Open-mouth panting and drooling.

How do cattle showing signs of heat stress compare to those that are not?

They have higher respiration rates and body temperatures.

What genetic differences may affect the stress susceptibility of agricultural animals?

Some strains may carry alleles causing malignant hyperthermia under mild stress.

What factors determine the space requirements for animals?

Enclosure shape, floor type, ceiling height, and other physical and social elements.

What should be considered when determining area requirements for domestic animals?

Body size, head height, stage of life cycle, behavior, health, and weather conditions.

What happens when animals are crowded?

Body weight gain and performance traits may be depressed, and aggressive behavior may increase.

What is the 'thermoneutral zone'?

The range of environmental temperatures where animals use the minimum amount of energy to control body temperature.

What factors affect the thermal balance of agricultural animals?

Air temperature, water vapor pressure, air velocity, and animal health and genetics.

What is the effective environmental temperature?

The combined effects of air temperature, vapor pressure, air speed, and other variables on animal comfort.

What is the temperature-humidity index (THI)?

An index used to classify thermal environments for animals based on temperature and humidity.

What categories of heat stress are defined by the THI?

Alert, danger, and emergency.

How does heat stress vary among different animal species?

Different species have different sensitivities to temperature and humidity.

What is the role of ventilation in animal housing?

To remove heat, water vapor, and pollutants while introducing fresh air.

Why is adequate ventilation important in animal facilities?

It prevents respiratory diseases and maintains acceptable air quality.

What may be required in ventilation systems where temperature control is critical?

Cooling or heating systems, and possibly filtration or air conditioning.

What is the primary means of maintaining air temperature and water vapor pressure in animal microenvironments?

Ventilation.

What factors determine the amount of ventilation needed in animal housing?

The size, number, type, age, dietary regimen of the animals, waste management system, and atmospheric conditions.

What is the primary goal of hot-weather ventilation in animal housing?

To remove heat and maintain relative humidity below 80%.

How does the ventilation rate change from cold to hot seasons?

It increases from a cold-season minimum to a hot-season maximum, usually around 10 times the minimum rate.

What is the significance of relative humidity in animal housing?

It describes the air moisture content and affects animal health.

What is the recommended air speed past very young animals during cold weather?

Less than 0.25 m/s (50 ft/min).

What are the main sources of water vapor and heat in animal housing?

The animals themselves.

What is the purpose of using fans in hot weather for animal housing?

To promote air movement when natural air movement is insufficient.

What can cause death in poultry when trying to reduce heat stress?

Inappropriate application of direct wetting.

What is the role of mechanical ventilation in animal housing?

To provide better control of air exchange and maintain uniform conditions.

What is natural ventilation and how does it function?

It uses thermal buoyancy and wind currents to vent air through openings in outside walls or at the ridge of the building.

What should be considered when designing a ventilation system for animal housing?

The relative air pressures between animal areas and service areas to minimize airborne disease agents.

What are the pollutant gases of most concern in animal facilities?

Ammonia, hydrogen sulfide, carbon monoxide, and methane.

What is the ideal concentration of ammonia for animal exposure?

Less than 10 ppm, not exceeding 25 ppm.

What is the maximum allowable concentration of carbon monoxide in air breathed by animals?

150 ppm.

What is the purpose of an automatic warning system in animal housing?

To alert personnel to power failures and out-of-tolerance environmental conditions.

What is the recommended action when waste pits beneath the floor are emptied?

Special ventilation is required due to potentially lethal hazards from hydrogen sulfide.

What should be done to protect waterers and water pipes from freezing?

They should be insulated.

What is the effect of high relative humidity on animal health?

It can cause health concerns unless managed properly.

What is the practical low operating temperature for animal housing?

The point at which manure freezes.

What are some methods to enhance natural ventilation systems?

Automatic curtains, vent panels, insulated ceilings, and circulating fans.

What is the primary function of ventilation in enclosed animal houses?

To maintain acceptable air quality and environmental temperature.

What should be done to ensure air quality in animal facilities?

Good ventilation, waste management, and husbandry practices.

What is the impact of atmospheric humidity on effective environmental temperature?

It becomes significant when air temperature approaches the animal's surface temperature.

What is the recommended practice for designing ventilation equipment?

Seek advice from a qualified agricultural engineer or specialist.

What is the goal of ventilation during cold weather?

To remove moisture without chilling the animals.

How can trees be utilized in animal housing?

As effective sunshades to reduce solar radiation load.

What is the role of mechanical ventilation in colder climates?

It provides better control of air exchange than natural ventilation.