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21 Cards in this Set
- Front
- Back
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Enterobacteriaceae
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Enterobacteriaceae:
- G- rods - primarly reside in intestine - saprophytes or parasites - BA, Mac 1. lactose fementors: pink on Mac - E coli, Klebsiella 2. non-lactose fermentors: no color - Salmonella, Proteus |
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Y. pestis spp
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Y. pestis spp:
1. rodents: fleas, cycle in nature 2. highly susceptible: humans,cats 3. less susceptible: dogs 4. not involved: cattle, horses, pigs |
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Plague forms
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Plague forms:
1. Bubonic: less serious/ easier to treat, drained lymph node 2. septicemic: acute, serious 3. pneumonic: serious - endemic in S. US - people: black gangrene |
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Feline plague
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Feline plague:
- transmission: ingestion of rodents, flea bites - dx: symptoms, blood/ aspirate smear (bipolar staining rods), culture, serology - tx: tetracycline - control: pop of fleas, rodents |
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Yersinia enterocolitica
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Yersinia enterocolitica:
- psychrophilic, psychrotropic - diarrhea, mesenteric lymphadenitis - normally in swine tonsils - source on infection: contaminated meat in humans, dogs |
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Shigella
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Shigella:
- bacillary dysentery: humans, monkeys - shiga toxin - resistant: food animals, horses - dogs: may excrete but resistant to clin dz - antibiotic sens testing important - shigellosis in horses: not due to Shigella |
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Yersinia spp
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Yersinia spp:
1. pestis 2. enterocolitica: enteritis (rarely dogs) and mesenteric lymphadenitis (humans) - swine: common carriers 3. pseudotuberculosis: dz not common, wild deer and bovines |
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Klebsiella gen
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Klebsiella gen:
- K. pneumoniae: LF, thick mucoid capsule - intestinal commensal: not gen a cause of diarrhea, opportunistic - drug resistance common: sensitivity testing |
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Klebsiella dz
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Klebsiella:
1. mares: metritis 2. cows: mastitis, wood shaving associated 3. dogs: UTI, otitis externa 4. companion birds: respiratory, septicemia, diarrhea |
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Salmonella gen
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Salmonella:
- Mac: NLF (no color) - Genus: Salmonella - Spp: enterica - Serotypes: typhimurium, dublin, choleraesuis - typhimurium: widest host range - slide agglutination with polyvalent antiserum to ID suspected cultures (serology) |
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Salmonella epidemiology
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Salmonella epidemiology:
- carriers: food animals, birds, rodents, fish 1. fish, bone meal, milk products 2. transmission+ stress, antibiotics, fasting 3. colonization 4. fecal shedding 5. spread to others |
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Salmonella dz
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Salmonella dz:
1. enteritis: ulcers, necrosis, diarrhea, mucous, fibrin, blood 2. septicemia: pneumonia, fever, depression, cyanosis of extremities, death 3. abortion: with septicemic dams |
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Salmonellosis cattle
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Salmonellosis catte:
1. typhimurium: most common serotype 2. dublin |
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Salmonellosis swine
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Salmonellosis swine:
1. typhimurium: enteritis 2. cholerasuis: septicemia, enteritis |
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Salmonellosis horses
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Salmonellosis horses:
- typhimurium: mostly - associated w/ stress, immunol def, - foals: diarrhea, endotoxemia, death - congested intestines |
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Salmonellosis carnivores
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Salmonellosis carnivores:
- rare! - dz in immunosupressed animals |
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Salmonellosis poultry
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Salmonellosis poultry:
- enteritis, septicemia, liver and spleen damage - not common in Can - carriers of other types 1. gallinarum 2. pullorum: fowl typhoid |
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Salmonella typhi
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Salmonella typhi:
- humans only - typhoid |
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Salmonella pathogenesis
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Salmonella pathogenesis:
1. colonize SI 2. invade enterocytes 3. inflammation of lamina propria: enterotoxin--> diarrhea 4. macs, PMNs 5. lymphatics, blood 6. endotoxin-mediated fever, vascular damage 7. complications: septicemia, pneumonia, meningitis, arthritis, abortion |
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Salmonellosis control, tx
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Salmonellosis control, tx:
1. prevent exposure to contaminated feed, environment, carriers (rodents) 2. reduce stress 3. avoid PO antibiotics 4. treat systemic inf w/ parenteral rx 5. endotoxemia: IV antiserum for horses |
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Proteus
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Proteus:
- vulgaris, mirabilis - opportunistic pathogens - localized, sporadic dz - BA: swarming growth - common pm contaminant - dogs: UTI, otitis externa - often drug resistant - smells like dirty socks |
