GI Pathogens Pictures

Question 1

Answer 1

E. Coli = Gram- bacilli, lac+, glucose fermenter w/H2 gas

Question 2

Answer 2

Salmonella Enteritidis, Typhimuium = Gram- Frank Pathogen Lac-, ferment glucose w/gas + production of H2S

Salmonella Typhoid = Lac-, ferment glucose w/out gas + H2S

Question 3

Answer 3

Yersinia Enterocolitica = Gram- coccobacilli ~ Safety Pin (bipolar stain)

Question 4

Answer 4

Shigella = Frank Pathogen Lac-, no gas, glucose+, non-motile, H2S-

Question 5

Answer 5

Rotavirus = Segmented, ds-RNA

• ↑Antigen diversity (G-P serotypes)
• Non-enveloped: ↑Survival
• 2-3 Concentric icosahedral capsids

Question 6

Answer 6

Norovirus = Non-segmented, +RNA, Nonenveloped

Question 7

Answer 7

Helicobacter Pylori = Slender curve Gram- Rod, Microaerophillic

Question 8

Answer 8

Vibrio Cholerae =

1. Motile (polar flagella) 2. Gram-, oxidase+ curved bacilli 3. Grow in ↑pH 4. Found in aquatic ecosystems

Question 9

Answer 9

Campylobacter Jejuni = 1. Gram-, Oxidase+ spiral rods (“Seagulls”) 2. Microaerophilic (grow only in ↓O2) 3. Grow at 42 C (bird temperature) 4. Small dose = massive death