Final Exam (Quiz 5) - Animal Health

Which one of the following is a potentially adverse effect of growth hormone (such as bST)?

Increased risk of mastitis

Which of the following is NOT present on a disinfectant label?

Veterinarian’s name

What is the term used for "the physical removal of visible contamination of microbes and other organic debris from surfaces and equipment"?

Cleaning

Vinegar is a commonly used disinfectant that is effective against many bacteria and fungi. Which of the following adverse reactions can occur with its use?

Corrosive to some surfaces

What is the predominant mode of action for probiotics?

Enhances digestion and nutrient availability

A biofilm is a single layer of bacteria highly vulnerable to disinfection

False

Which of the following pathogens is most resistant to disinfection?

Prion

Which one of the following is NOT an allowed use of antibiotics by the FDA?

To promote the growth of animals

Which one of the following is a potentially adverse effect of reproductive hormone analogs (such as trenbolone acetate)?

Reproductive abnormalities

What is the term used for "the chemical or physical process that destroys pathogens on inanimate surfaces and objects"?

Disinfection

Direct sunlight can be an effective form of disinfection for some microorganisms

True

Which of the following disinfectants is highly toxic in aquatic animals?

Bleach

Which of the following is included on all U.S. disinfectant labels?

EPA Reg. No.

What is the predominant mode of action for estradiol?

increases growth hormone and insulin-like growth factor (IGF-1)

Which of the following factors does NOT influence the effectiveness of a disinfectant?

Flavor

What is the natural analog of melengesterol acetate?

Progesterone

Boot baths are commonly used to prevent disease agent transmission in animal settings. Which of the following practices may cause boot baths to be ineffective and increase transmission of disease agents?

Letting the disinfectant solution sit for a week without fresh replacement.

Which of the following would be considered “risks” of using growth promotants in food animals?

Can be fatal if accidentally administered to unintended animal, Some markets prohibit their use, Possible need for withdrawal period for meat/milk products

Which of the following would be considered “benefits” of using growth promotants in food animals?

Reduced need for natural resources (feed), Controlled reproductive behaviors, Meet growing demands of human population

Which of the following is NOT considered a physical disinfectant?

Lye

What is the predominant mode of action for progesterone?

Suppresses the estrus cycle

Order the steps for effective disinfection

Dirty animal pen/crate

Remove all organic material

Wash and scrub with a detergent

Rinse

Dry

Apply disinfectant

Allow proper contact time

Rinse and allow to dry

Antimicrobial growth promotants are typically provided in what form?

Oral feed additive

What is the predominant mode of action for testosterone?

Stimulates protein synthesis in muscle cells

Probiotics foster healthy gut microbial populations

True

What is the term used for “the elimination of all forms of microbial life”

Sterilization

Which one of the following is a potentially adverse effect of beta agonists (such as Clenbuterol)?

Cardiac and skeletal muscle abnormalities