Final Exam Flashcards
What glands in cattle empty mucinous secretions at 2ml/kg/hr beneath the tongue?
Mandibular
Sublingual
What gland in cattle empties alkaline aqueous secretions on the buccal side of the cheek at 4ml/kg/hr?
Parotid
What is the normal HR for cattle?
60-80bpm
What does the positive Wither’s pinch (scootch test) indicate?
This is a test done with cattle to evaluate if there is cranial abdominal or caudal thoracic pain
What diseases can cause cranial abdominal pain in cattle?
- Traumatic reticulitis (Hardware disease)
- Ruptured liver abscess
- Ruptured abomasal ulcer
What diseases can cause caudal thoracic pain in a cow?
- Pleuritis
2. Pleuropneumonia
What type of bacteria is salmonella?
Gram negative anerobe/facultative anerobe/facultative intracellular pathogen
What are the two antigens are used to describe the types of salmonella?
O: somatic
H: flagellar
What serotypes of salmonella are important in cattle?
S. typphimurium
S. Newport
S. Dublin
What species of large animals are susceptible to Salmonella typhimurium, Salmonella anatum, S. newport, and S. agona?
Horses
What serotypes of salmonella infect both cattle and horses?
S. typhomurium
S. newport
What is the difference between host-adapted and non host-adapted strains of salmonella?
Host-adapted can only colonize one or a few species while unadapted species tend to cross species lines easily and are more zoonotic.
What serotypes of salmonella are host-adapted?
S. dublin
S. abortusequi
S. abortusovis
How are most infections of salmonella acquired?
Fecal-oral transmission from the bacteria being recently shed in the feces of an infected animal. Can also occur by direct contact or contact with fomites and even respiratory transmission.
What is the most common fomite that is thought to infect animals with salmonella?
Infected feed, fertilizer, and plant materials
Why is incidence in salmonellosis increasing in large animals?
- Changes in stocking rates
- Feeding practices
- Enhanced detection techniques
What is the most important factor in preventing salmonellosis?
Adequate space between animals in a herd
What population of large animals is most likely to be infected with salmonellosis?
Dairy cattle on large diaries
Which strains of salmonella persist in lifelong shedders?
Host adapted
How does salmonella cause deep, ulcerative inflammation in the GI tract?
It attaches to enterocytes and the lamina propria via fimbriae causing cell death and inflammation
How is is possible that some strains of salmonella can persist in an animal?
It travels to lymphoid tissue and hides in lymphocytes
How does salmonella cause secretory diarrhea and toxemia?
Salmonella releases enterotoxins that cause the diarrhea and endotoxins that can cause toxemia
When do clinical signs generally start after an animal is infected with salmonella?
1-9 days and as little as 15 minutes in neonates
What population of large animals are most at risk to salmonellosis? Why?
Neonates and sick animals
Due to maternal shedding, contaminated colostrum and poor immunity