Cattle Flashcards
(135 cards)
What is Foot and Mouth Disease (FMD)?
An acute viral and extremely contagious disease of cloven footed animals such as cattle, sheep, goats, pigs and antelope characterized by vesicles and erosions in various parts of the body.
FMD strains include A, O, C, SAT 1, SAT 2, SAT 3, and ASIA-1.
What are the main transmission routes for FMD?
Direct and indirect contact with infected animals and their secretions, aerosol droplet dispersion, infected animal by-products, swill, and fomites.
FMD can spread through saliva, blood, urine, feces, milk, and semen.
What are the antemortem findings for FMD?
- Incubation: 1 - 5 days or longer
- Morbidity: Nearly 100%
- Mortality: Variable, 50% in young animals, 5% in adults
- Fever up to 41°C
- Dullness
- Lack of appetite
- Drastic drop in milk production
- Uneasiness and muscle tremors
- Vesicle formation
- Extensive salivation and drooling
- Shaking of feet and lameness
Vesicles commonly found on the muzzle, tongue, oral cavity, teat, and skin between hooves.
What are the postmortem findings in FMD?
- Necrosis of heart muscle (tiger heart)
- Ulcerative lesions on tongue, palate, gums, pillars of the rumen, and feet.
Postmortem findings can vary based on the strain and severity of the disease.
What is the judgement for carcasses in FMD free zones?
Diseased or suspect animals are prohibited from being admitted to an abattoir or slaughtered.
If FMD is suspected, the carcass and viscera are condemned.
What is Rinderpest (RP)?
An acute, highly contagious, fatal viral disease of cattle, buffalo, and wild ruminants with symptoms including inflammation, hemorrhage, erosions of the digestive tract, and bloody diarrhea.
Rinderpest virus is not transmissible to humans.
What are the transmission methods for Rinderpest?
Direct contact with infected animals or their excretions and secretions, and fomites.
The virus can be present in blood and secretions prior to clinical signs.
What are the antemortem findings for Rinderpest?
- Incubation: 3 - 10 days or longer
- Morbidity: Up to 100%
- Mortality: 50% to 90-95%
- High fever (41-42°C)
- Nasal discharge and excessive salivation
- Punched out erosions in the mouth
- Loss of appetite and depression
- Constipation followed by bloody diarrhea
- Dehydration and rough hair coat
- Marked debility
- Abortion
The disease can cause severe gastrointestinal symptoms.
What are the postmortem findings in Rinderpest?
- Punched out erosions in the esophagus
- Edema or emphysema of the lungs
- Hemorrhage in spleen, gallbladder, and urinary bladder
- Hemorrhagic or ulcerative lesions in the omasum
- Severe congestion and hemorrhage in the intestine
- Necrotic Peyer’s patches
- Emaciated carcass
These findings are indicative of advanced disease.
What is Vesicular Stomatitis (VS)?
A viral disease of ruminants, horses, and swine characterized by vesicular lesions of the mouth, feet, and teats.
VS virus has two serotypes: Indiana and New Jersey.
What are the transmission routes for Vesicular Stomatitis?
Contamination of abrasions with saliva or lesion material, ingestion of contaminated pasture, and mechanical transmission by biting arthropods.
The virus can be isolated from various insect vectors.
What are the antemortem findings for Vesicular Stomatitis?
- Fever
- Mouth lesions in cattle and horses
- Marked weight loss and cessation of lactation in dairy cows
- Chewing movements and profuse salivation
- Refusal of food but acceptance of water
- Lameness
Foot lesions occur in about 50% of cases in cattle.
What is Malignant Catarrhal Fever (MCF)?
An acute viral disease characterized by inflammation of mucous membranes, nasal discharge, and enlargement of lymph nodes.
MCF is not communicable to humans.
What are the transmission methods for Malignant Catarrhal Fever?
Close contact between cattle and wildebeest or sheep.
In European MCF, cattle are infected from sheep.
What are the antemortem findings for Malignant Catarrhal Fever?
- Incubation: 9 - 44 days
- Increased temperature
- Bilateral ocular and nasal discharges
- Dyspnea and cyanosis
- Loss of appetite
- Erosions on lips, tongue, gums
- Enlarged body lymph nodes
Symptoms can include severe ocular and nasal symptoms.
What is Rabies?
An acute infectious viral disease of the central nervous system in mammals, typically transmitted through saliva via bites from rabid animals.
The most common carriers are dogs and jackals.
What are the antemortem findings for Rabies?
- Furious form: restlessness, aggression, bellowing, paralysis
- Paralytic form: sagging hind quarters, drooling, paralysis
Incubation can range from 2 weeks to 6 months.
What is Lumpy Skin Disease?
An acute pox viral disease of cattle characterized by sudden appearance of nodules on the skin.
It is transmitted by insect vectors and can occur through direct and indirect transmission.
What is lumpy skin disease?
An acute pox viral disease of cattle characterized by sudden appearance of nodules on the skin.
Transmission occurs via insect vectors through direct and indirect means.
What are the incubation and antemortem findings for lumpy skin disease?
Incubation: 4 - 14 days; findings include fluctuating fever, diarrhea, nasal discharge, salivation, and cutaneous nodules.
First lesions appear in the perineum.
What postmortem findings are associated with lumpy skin disease?
Ulcerative lesions in mucosa, reddish to whitish lesions in lungs, edema, and thrombosis of skin vessels.
Skin lesions may show scab formation.
What is the judgment for carcasses of animals with mild cutaneous lesions and no fever?
Conditionally approved pending heat treatment; affected parts condemned.
Generalized acute infection with fever leads to condemnation.
What are some differential diagnoses for lumpy skin disease?
- Allergies
- Screw-worm myiasis
- Urticaria
- Dermatophilosis
- Bovine herpes dermophatic infection
- Vesicular disease
- Bovine ephemeral fever
- Besnoitiosis
- Bovine farcy
- Skin form of sporadic bovine lymphomatosis
What is bovine herpes dermophatic disease (BHD)?
A herpes virus infection of cattle and sometimes sheep and goats characterized by cutaneous lesions and fever.
Transmission occurs via biting insects and mechanical milking.