Disease of Livestock Animals

Etiology is the study of disease while pathology is the study of the cause of the disease.

• True

• False

Which of the following is the correct definition for a disease?

• An alteration of the body which interrupts the body’s normal function

• Factors making an animal more susceptible to an illness

• The body’s ability to maintain a stable internal environment

• An imitated immune response

Match the following pathogen with the correct description.

• Virus

• piece of genetic code protected by a coating of protein

• Parasite

• organism which lives in or on another organism

• Fungi

• single celled microorganism varying in shape and size

• Bacteria

• spore-producing organism

Which of the following is NOT a category of predisposing factors?

• Environmental

• Producer

• Stress

• Animal

A cow was noticeably ill after being exposed to hot summer temperatures. The producer takes her to the vet where they notice a toxin has caused a disruption in her respiratory cell’s normal functions. Which of the following best describes the cause of the illness?

• A. Direct transmission

• B. Indirect transmission

• C. Both direct and indirect transmission

• D. Neither direct or indirect transmission

Which of the following is NOT considered a vector?

• Rodent

• Mosquito

• Boots

• Feral Cat

The difference between direct transmission and vector-borne transmission is the consistent external carrier organism of a different species in direct transmission.

• True

• False

Which of the following is the definition for pathogen?

• The body’s ability to maintain a stable internal environment

• An alteration of the body which interrupts the body’s normal function

• An organism responsible for causing disease

• The ability to form resistance

Match the following diseases with the correct spreading method by which each was caused.

• Direct Contact

• West Nile

• Vector-born

• Porcine respiratory disease

• Oral

• Brucellosis

• Formite

• Foot & Mouth Disease

• Aerosol

• Most Diseases

Determine if the following daily tasks are possible pathways of transmission by selecting Yes or No.

Using the same needle on multiple animals.​ (a)   ​

Leaving the barn door open and allowing birds to fly in.​ (b)   ​

Providing cattle dirty or contaminated water.​ (c)  

Animals kept close together and coughing on one another.​ (d)  

• Yes
• No