Flashcards in Listeria Deck (16)
Listeria - Descriptive statement
Gram positive, *motile* *peritrichous flagella*, coccoid rod shaped, *non acid fast* catalase +, oxidase -, non-spore forming, Facultative anaerobe
Listeria CAMP positive with which species?
L. monocytogenes with Staph aureus - L. invanovii with R. equi
Facultative intracellular in macrophages
Intestinal & CNS routes (via neural sheath of trigeminal nerve)
Listeria Virulence factors
**ActA** (hijack actin cytoskeleton for intracellular movement) - *Internalins* (adhesion & entry into cell) ***Listeriolysin O*** (main facor, pore-forming)
Listeria are associated with what type of food in domestic animals? What seasons most common
Silage - Silage diseases is classic. Winter & spring most
Listeria in ruminants
"M-A-C-E" - Mastitis - Abortion - Conjunctivitis- Encephalitis (Circling Diseases, perivascular cuffing seen on histo)
When I tell you a cow is circling, you might say
Listeria! -Likely death in 2-3 days
If perivascular cuffing is seen in ruminant CNS histology, you might think...
If a fetus is aborted late-term and appears macerated, or delivered weak and moribund, you think...
What type of bacteria is risky in *unpasteurized milk*, due to it's subclinical infection of cows?
Listeria in birds
Myocardial necrosis - degenerative & serofibrinous pericarditis
Myocardial necrosis, degenerative & serofibrinous pericarditis in birds
Listeria in horses
Septicemia in neonates
Listeria in chinchillas