Unit 2- Salmonella Flashcards
Enterobacteriaceae
Gram negative, rod shaped, catalase positive, oxidase negative, facultative anaerobe, non fastidious, non spore forming, grow on bile, most motile
Ceek Group
Lactose fermenters; Citrobacter, E. coli, Enterobacter, Klebsiella
SPY-Sh Group
Lactose non fermenters, highly pathogenic; Salmonella, Proteus, Yersinia, Shigella
Enterobacteriaceae Diagnostics
Lactose test for CEEK vs SPY-Sh, gas production, motility, IMVic test
Enterobacter Tests
Lactose fermenter, fast growth, CO2 producer, urease negative
Klebsiella Tests
Lactose fermenter, fast growth, CO2 producer, urease positive
Citrobacter Tests
Lactose fermenter, slow growth, H2S producer, urease positive
Proteus Tests
Non lactose fermenter, H2S producer on TSI, urease positive
Salmonella Tests
Non lactose fermenter, H2S producer on TSI, urease negative
Yersinia Tests
Non lactose fermenter, no gas production, urease positive
Urease Negative Enterobacteria
Salmonella and enterobacter
H2S Gas on TSI Enterobacteria
Salmonella, proteus, citrobacter
Enterobacteria Habitat
Small and large intestine
Enterobacteria Transmission
Oral-fecal transmission, commensal of digestive but can cause disease
Enterobacteriaceae Disease
GI infection, diarrhea, liver abscess, UTI, bacteremia, meningitis, mastitis
Enterobacteriaceae Surface Structures
Capsule, flagella, fimbriae, adhesins, invesins, LPS
Enterobacteriaceae Enzymes
Catalase and superoxide dismutase
Enterobacteriaceae Toxins
Hemolysin, siderophores, pathogenicity island, type 3 secretion system
Pathogenicity Island
Area of genome encoding toxins, enzymes, and type 3 secretion system
Type 3 Secretion System
Syringe apparatus on the cell wall to inject enzymes, toxins, and cytokine inhibitors
Enterobacteriaceae Antigenicity
Wide diversity due to LPS, flagella, and capsular antigen