Final Exam: Cardio/lymph/CNS/Musculoskeletal Flashcards
Which of the following organisms does not have a predilection for nervous tissue?
Cryptococcus neoformans
Histophilus somni
Listeria monocytogenes
Salmonella
Salmonella (GI tract is predilection site)
Pleocytosis is the presence of:
increased number of cells in the cerebrospinal fluid
T/F: Bacteriostatic agents are a good choice for treating infections of the CNS
FALSE
Bactericidal is best
Histophilus somni causes what dz in cattle?
Thromboembolic menigoencephalitis (TEME) or Thrombotic meningoenephalitis (TME)
*usually occurs 1-2 weeks after episode of pneumonia, blindness, ataxia, convulsions, depression and coma – death in ~ 12 hrs
What are pathognomonic lesions of Histophilus somni?
Multiple reddish necrotic foci, thrombi in blood vessels composed of leukocytes, fibrin
What time of year do you see outbreaks of listeriosis?
Winter - spring
usually occurs after ingestion of contaminated silage during winter time
What is the best sample to collect for listeriosis testing?
Brain stem
T/F: Listeria cultures need to be specifically requested; normal culture will not work well
TRUE
What is the drug of choice for listeriosis?
Penicillin
What pathogen causes sporadic bovine encephalomyelitis in feedlot cattle?
Chlamydia pecorum
Systemic infection by Salmonella dublin can cause ________ in calves
Meningitis
What fungal infection can invade the CNS, most commonly in cats?
Cyptococcus
What is the hallmark sign (at necropsy) of Clostridium perfringens type D in sheep?
Causes focal symmetrical encephalomalacia
*symmetrical necrosis and hemorrhage of the white matter
What is traumatic reticulopericarditis?
hardware dz in cattle
Multiple bacteria will be involved
T/F: the pathogen that causes black leg dz, can also cause pericarditits and myocarditis
TRUE
Edema disease in weaned pigs is due to what pathogen?
Shigatoxigenic E. coli
generalized edema, edema of the eyelids and colon**
What pathogen causes caseous lymphadenitis in sheep and goats?
Corynebacterium pseudotuberculosis
Strangles is caused by ___________ in
Streptococcus equi subsp equi
What does corynebacterium pseudotuberculosis cause in horses?
Pigeon fever - lymphangitis
What pathogen causes lymphangitis in cats and horses?
Sporothrix schenkiii - dimorphic fungus
What dimorphic fungi can cause severe osteomyelitis?
Coccidioides immitis
Arizona area
Neorickettsia have an affinity for what cells?
macrophages
They replicate in enterocytes
What causes Tropical pancytopenia? Who does it infect? What cells does it have an affinity for?
Ehrlichia canis - infects dogs
Affinity for haematopoietic and endothelial cells
*macrophages - can also colonize lymphocytes
Ehrilicia ruminantium causes what disease?
Heart water dz in cattle
What best diagnostic test for histotoxic clostridium?
DFT: direct fluorescent antibody staining test
Anaplasma platys infects what cells in what host?
Platelets in canines
What pathogens cause “tick cattle fever”?
Anaplasma Marginale (found in the periphery of erythrocytes)
Babesia (found inside erythrocytes)
What pathogen causes “hariy heel warts”?
Treponema spps in cattle
Papillomatous digital dermatitis
Clostridium piliforme causes what dz in what animals?
Tyzzer’s DZ
Lab animals and horses
Causes necrotizing hepatitis
Who is most commonly affected by Black leg disease? What is the causative agent?
Healthy, young cattle at pasture, in the summer are most at risk
Clostridium chauvoei
Malignant edema can be seen in horses, small ruminants, and swine do to an infection of _______
Clostridium septicum
Increased risk of infection after IM injections, docking, sheaing, and lambing
