Enteric Infections Lecture 13

Question 1

Watery Diahrrea. Location and organisms

Answer 1

-Located in the small intestine. Cholera, Enterotoxigenic E coli, Giardia, Clostriduim Perringes

Question 2

Dysentery. Location and Organisms

Answer 2

-Located in the Colon. Presence of blood and puss in the stool. Shigella, Campylobacter, E Coli Enterohemorrhagic, Salmonella (some strains)

Question 3

Enteric Fever

Answer 3

-Can be watery or blood/pus, but with expansion of bacteria thoughout GI and possibly other systems. With presence of fever. Salmonella typhi, Yersinia hemolyticus.

Question 4

Vibrio Cholera

Answer 4

-Contaminated drinking water. Rice water stools. ADP ribosylation of Adenylate cyclase leading to increased cAMP and excretion of K, Cl, HCO3 and loss of water. Infects the small intestine

Question 5

Vibrio Hemolyticus

Answer 5

-Most common cause of food poisoning in Japan, undercooked or raw seafood and shellfish. Causes self limited watery diarrhea of small intestine. Severe problems in those with cirrhosis.

Question 6

Enterotoxigenic E Coli

Answer 6

-Most common cause of travelers diarrhea (Shigella is second) self limiting infection in small intestine. Also E Coli Aggregative and pathogenic.

Question 7

Giardia Lambelli

Answer 7

-Picked up from unpurified drinking water camping or day cares. Parasite. Can become chronic. Includes bloating aches and fever.

Question 8

Shigella sp

Answer 8

-Soneii is most common, commonly picked up at day care centers. Causes dysentry and blood/pus in stool. Infects the large intestine.

Question 9

Clostridium dificile

Answer 9

• Most common hospital acquired, spores are very contagous, can arise because of antibiotic therapy. Usually self limited but may have to treat.

Question 10

Campylobacter

Answer 10

-Causes dysentery with blood and pus in stool. Common source of food poisoning. Risk of Rieters (arthritis) and Guillen-bare.

Question 11

Salmonella

Answer 11

-Infection can be different depending on strain. Watery, dysentery, or enteric fever. S. typhi causes epidemic typhoid fever that causes fever and sustained bacteremia. There can be a pulse/fever mismatch with a normal pulse rate and elevated fever.

Question 12

Yersinia enterolitica

Answer 12

-Causes enteric fever. Often mimics appendicitis with pain.

Question 13

Inflammatory

Answer 13

-Bacterial etiology with possible growth

Question 14

Noninflammatory

Answer 14

-Preformed toxin, viruses, or non microbial source.