Food Animal Flashcards
Covers - Food Animal Parasitology - Food Animal Zoonoses - Cattle Husbandry - Small Ruminant Husbandry - Food Animal Parasite Control - Swine Husbandry - Swine Herd Health - Dairy Herd Health - Low Stress Handling - Small Ruminant Herd Health - Beef Herd Health
What are the major parasites in cattle?
(GI strongylid nematodes (trichostrongyles), coccidia, flies, and lice)
What is the primary impact of trichostrongyle infections on immature cattle?
(The subclinical impact on growth and development, they do also get clinical disease but the subclinical impact is the primary impact)
When is the best time to deworm spring born beef calves?
(Midsummer, has shown some benefits (increased gain); otherwise can also deworm at the beginning of the grazing season depending on the age of the calf and/or at weaning)
What is the purpose of deworming fall born beef calves at the beginning of the next grazing season?
(To limit the maturation of the larvae obtained in the last grazing season)
Coccidiostat treatment for Eimeria is often used routinely at points when disease is expected to occur, when are those times? Three answers.
(At weaning, post weaning, and upon entry into feedlots)
You should leave what percentage of a cattle herd untreated with anthelmintics in a selective nontreatment program?
(10-20%)
(T/F) Food animals that are euthanized with intrathecal lidocaine hydrochloride do not need to be buried nor do they pose a hazard to wildlife.
(T)
(T/F) Exsanguination is never used by itself in food animals.
(T, it is just used to ensure death after unconsciousness is achieved via other methods)
What is an appropriate method of euthanasia in food animals if you do not have access to a gun or chemical euthanasia?
(Sedation and exsanguination)
What animal products are possibly infectious to humans when the animal is infected with Mycobacterium paratuberculosis? Two answers.
(Meat and milk products)
What is the term for the non-healing painless ulcers that form in human cases of tuberculosis?
(Tuberculous chancres, will have regional lymphadenopathy in addition)
What type of inflammation is associated with tuberculosis lesions in animals?
(Granulomatous)
What is the most common diagnostic test used for tuberculosis cases in both humans and animals?
(The intradermal tuberculin test)
There is a history of Mycobacterium tuberculosis in cattle in Michigan, what animals were the source of the cross over?
(White tailed deer)
(T/F) Brucellosis can be acquired by humans from animals both directly (i.e. exposure to fetal fluids) and indirectly (i.e. ingestion of infected animal products).
(T)
What food product is brucellosis outbreaks often associated with?
(Soft, non-pasteurized mexican cheese)
How do cats and dogs acquire pseudotuberculosis?
(From ingesting infected rodents (who are the reservoir for Yersinia pseudotuberculosis))
How can humans acquire pseudotuberculosis? Two answers.
(Contact with infected animals or ingestion of food contaminated by infected animals)
Yersinia enterocolitica produces an enterotoxin similar to what other bacterial organism?
(E. coli)
Pigs are suspected to be the major reservoir for Yersinia enterocolitica but several outbreaks in humans have been associated with what other species? Two answers.
(Dogs and cats, specifically puppies and kittens with diarrhea)
(T/F) Both Yersinia pseudotuberculosis and enterocolitica are associated with appendicitis-like symptoms such as abdominal pain and diarrhea.
(T)
(T/F) Human cases of Salmonella are associated mainly with GI signs and it is usually a self-limiting disease.
(T)
What animal species are human cases of Campylobacter jejuni typically acquired from? Two answers.
(Dogs and cats, usually from shelters)
What are the two forms of leptospirosis humans can get?
(Icteric → jaundice, petechiae, hepatomegaly, renal insufficiency, and aseptic meningitis; and anicteric → flu like so fever, chills, malaise, myalgia, stiff neck, vomiting)
What animal is the main reservoir of leptospirosis?
(Rodents → also in swine, cattle, deer, raccoons and more)
How is Chlamydophila psittaci transmitted to humans?
(It is inhaled usually when clean the cage of an infected bird)
Compare and contrast the clinical signs of psittacosis in humans and birds.
(Humans → respiratory signs; birds → either inapparent infection or GI signs)
What drug class is used to treat psittacosis in birds?
(Tetracyclines, have to treat for 45 days)
What is the causative agent of chlamydiosis in sheep that causes abortion in pregnant women who can acquire this agent from fetal and uterine fluids from infected ewes?
(Chlamydophila abortus)
What is the causative agent of Q fever?
(Coxiella burnetii)
Do animals show similar signs to humans (flu-like symptoms) if they have Q fever?
(No, animals are inapparent carriers with the exception of possible abortion in goats and sheep)
How are humans infected with Erysipelothrix rhusiopathiae?
(Through wounds)
What is the term for Erysipeloid disease in pigs?
(Diamond skin disease)
What is the term for Erysipeloid disease in poultry?
(Blue comb)
Compare and contrast the symptoms of Streptococcus suis infections in suckling versus weaned pigs.
(Suckling - peracute meningitis and septicemia; weaned - arthritis and/or septicemia)
How is Streptococcus suis transmitted to humans?
(Via butchering/necropsy)
Which species of Streptococcus is a common cause of human neonatal septicemia?
(Streptococcus agalactia → but not the same as what is found in cows)
What species of Streptococcus is associated with Strep throat?
(Streptococcus pyogenes)
(T/F) Animals are essential for transmission of Bacillus anthracis to humans.
(T)
What are the three forms of anthrax infections in people?
(Cutaneous → vesicle at the inoculation sight, develops into a black depressed area with a thick crust; pulmonary → initially mild and resembles a mild URI, 3-5 days later present with acute fever, shock, and death; GI → vomiting, bloody stool)
What are the two ways that humans can contract ovine contagious ecthyma?
(Virus enters broken skin or iatrogenic inoculation when vaccinating animals with the live vaccine)
What is the main clinical sign of new castle disease in humans?
(Conjunctivitis)
What disease results in calve infections with the same parapoxvirus that causes pseudocowpox?
(Bovine papular stomatitis → humans can get milkers nodules from both adult cattle and calves)
(T/F) Human to human transmission is very, very rare for H1N1/swine flu.
(F, it is very rare for AVIAN influenza to pass from human to human but that is actually how it is spread for swine flu, swine do not appear to play a role in transmission of swine flu)
Is H1N1 or H3N2v associated with disease in adults between the ages of 20-40, young children, and pregnant women?
(H1N1; H3N2v is typical influenza → most susceptible being at risk such as young, old, and compromised immune systems)
How do you know if a cow is over the age of 30 months (which changes what is removed to prevent the transmission of BSE to humans)?
(If one of the second incisors are present, they are over the age of 30 months)
What two species can transmit Nipah virus to humans?
(Pigs and bats)
What are the three major contaminants of water that is provided to cattle?
(Blue-green algae, sulfur, and feces)
What populations of cattle is the BCS best used for?
(Cows, it was not designed for bulls or heifers)
How long should small ruminants be quarantined to prevent disease from entering a herd?
(30 days)
Animals should be at least how old prior to serological testing to make sure they are actually indicating disease instead of colostral immunity?
(6 months old)
How many small ruminants equate to one cow/calf unit?
(5)
How much acreage of pasture does a single cow/calf unit require?
(2 acres → i.e. 5 small ruminants need 2 acres)
What percentage of a small ruminant’s maintenance diet should be protein?
(8%)
What percentage of their body weight will a small ruminant eat on a dry matter basis?
(2% of the BW → if lactating 4% and if growing 5%)
When should artificially fed lambs and kids be weaned?
(When they achieve a BW of 20lbs and are eating 0.5 lbs of creep feed)
How much milk in percent of body weight do lambs and kids consume?
(20%, depending on age this amount is split up into multiple feedings)
What is the age range that lambs and kids who are naturally feeding wean off of mom?
(8-12 weeks of age)
(T/F) You should avoid adding calcium to a small ruminant diet when in late gestation.
(F, should ADD calcium to the diet during late gestation to avoid hypocalcemia)
What is the purpose of maintaining a calcium:phosphorus ratio of 2:1 in mineral rations fed to small ruminants?
(To avoid urolithiasis)
(T/F) Shearing prior to lambing can decrease pregnancy toxemia.
(T)
What treatment should be done concurrently to shearing?
(Lice treatment)
What solution is used for foot baths in small ruminants?
(10% zinc sulfate solution)
What is the best strategy used for choosing animals for targeted selected treatment in sheep?
(FAMACHA scoring)
What is the best strategy used for choosing small ruminants to breed that will have worm resistance?
(Fecal egg count)
(T/F) There are no FDA approved drugs for treatment of coccidiosis in sheep and goats.
(T)
(T/F) Sheep are more susceptible than goats to Haemonchus infections i.e. a higher proportion of them show clinical haemonchosis, even in adults.
(F, goats are more susceptible than sheep)
(T/F) You should assume that on ANY farm, Haemonchus is at least partially resistant to one or more drug groups.
(T)
What is the goal of integral parasite management?
(Keep worms at a level that does not have a detrimental health effect)
(T/F) Targeted selective treatment is the practice of treating only individuals that seem to suffer consequences of parasitism or are likely to benefit from receiving a treatment.
(T)
Do you want a higher or lower FAMACHA score?
(Lower; 1 → not anemic; 5 → severely anemic)
The addition of what type of wire particles with your anthelmintic treatment can boost the activity of your drug of choice even if the Haemonchus is resistant?
(Copper oxide)
Increase of what diet component (protein, carbohydrates, or fat) may have a beneficial effect on parasite levels in young or lactating animals?
(Protein)
What is the name of the fungus that feeds on nematodes and can reduce the number of larvae on pasture?
(Duddingtonia flagrans)
What time period (range in weeks) should BCS be performed on late gestation cows?
(6-8 weeks prior to calving)
What are the two most important times to check BCS on beef cows?
(6-8 weeks prior to both breeding and calving)