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Bact/Myc
Final Exam
63
Microbiology
Professional
10/12/2010

Additional Microbiology Flashcards

 


 

Cards

Term
What is administered to prevent neonatal diarrhea from E. coli?
Definition
Antibiotics (Orally)
Term
Are Enterobacteriaceae Gr + or -? What shape?
Definition
Gr - Rods
Term
What is the habitat/lifestyle of Enterobacteriaceae?
Definition
Saprophytes or Parasites
Term
What media do Enterobacteriaceae grow on?
Definition
Readily on BA; MacConkey
Term
Name some non-Lactose-fermenting Enterobacteriaceae.
Definition
Salmonella; Proteus
Term
Name some Lactose-fermenting Enterobacteriaceae.
Definition
Escherichia coli; Klebsiella
Term
What do LF & non-LF look like on Mac?
Definition
Pink; No color
Term
Describe the types of E. coli. What is used to identify pathogenic strains?
Definition
Some pathogenic, some harmless (intestinal commensal); Serotyping/Epidemiological study
Term
Give an example of a pathogenic E. coli. What does it cause?
Definition
O157:H7; Hemorrhagic colitis in humans
Term
After culture, what is done to determine if a strain of E. coli is pathogenic?
Definition
Specific antiserum is added to the bacteria; Agglutination = pathogenic strain
Term
In E. coli, what Ag is H? K? O?
Definition
H = flagella Ag
K = capsule & pili Ag
O = cell wall Ag
Term
What is the major aerobic bacteria in mammalian feces?
Definition
E. coli
Term
ETEC
Definition
Enterotoxigenic E. coli
Term
STEC
Definition
Shiga Toxin E. Coli
Term
(Generally) What does ETEC cause? What does STEC cause?
Definition
Diarrhea; Hemorrhagic Diarrhea
Term
(Specifically) What does ETEC cause?
Definition
Porcine neonatal diarrhea; White scours in calves
Term
(Specifically) What does STEC cause?
Definition
Porcine post-weaning diarrhea & edema dz
Term
What condition is caused by STEC, VTEC & EHEC?
Definition
Hemorrhagic colitis & hemolytic uremic syndrome in humans
Term
What causes Edema dz?
Definition
STEC
Term
What dz does E. coli cause in young animals & chickens?
Definition
Septicemia
Term
What dz does E. coli cause in lambs? What virulence factor causes it?
Definition
Watery mouth; Endotoxin
Term
What dz does E. coli cause in dogs?
Definition
UTI; Pyometra
Term
What may follow omphalophlebitis in calves?
Definition
Septicemia
Term
What are the virulence factors of E. coli?
Definition
Capsule; Endotoxin; Pili/Fimbriae; Enterotoxins; Shiga Toxins; Hemolysin
Term
Can capsules be seen w/ Gr stain?
Definition
No
Term
What does E. coli endotoxin cause?
Definition
Fever; Intravascular clotting
Term
Give an example of E. coli pili. What does it do?
Definition
K88, K99; Helps colonization
Term
What does E. coli enterotoxins do?
Definition
Cause fluid secretion (loss of water & electrolytes)
Term
What does E. coli Shiga toxins do?
Definition
Verotoxins incl. Edema dz toxin
Term
What does E. coli hemolysin cause?
Definition
UTI
Term
If there is an outbreak of diarrhea in piglets, is culture sufficient to determine E. coli as the cause?
Definition
No; must do Aggln test also
Term
What is the #1 cause of UTI in humans?
Definition
E. coli
Term
How does E. coli cause diarrhea?
Definition
Inf --> Attachment via pili --> Enterotoxin --> Fluid, electrolyte loss
Term
What is an important predisposing cause of E. coli diarrhea in neonates?
Definition
Not receiving colostrum
Term
W/ E. coli diarrhea, what leads to death?
Definition
Loss of water & electrolytes
Term
How does E. coli attach to intestinal villi?
Definition
Via pili or fimbriae
Term
What dz's does E. coli cause in pigs?
Definition
Neonatal enteritis (<5 day old animals); Post-weaning diarrhea; Edema dz
Term
Describe Edema dz; What animals does it affect?
Definition
Pigs of any age (more common in weanling pigs); Toxin in intestine --> Blood --> Damaged blood vessels --> Edema
Term
What does neonatal diarrhea in a piglet cause?
Definition
Dehydration, Acidosis, Death
Term
What is the Tx for neonatal diarrhea?
Definition
Fluids & Electrolytes
Term
What is one sign of Edema dz in pigs?
Definition
Edematous swelling of eyelids; Edematous stomach wall
Term
What dz's does E. coli cause in cows?
Definition
Hemorrhagic colitis in calves (STEC); White scours/diarrhea in calves --> Colisepticemia/Colibacillosis; Arthritis
Term
What may precede Colisepticemia/Colibacillosis?
Definition
Omphalophlebitis/Navel ill
Term
Is hemorrhagic colitis in calves common?
Definition
No
Term
What is navel ill? What does it lead to w/o Tx?
Definition
Navel inflammation & Fever; Death from septicemia w/i 2 days
Term
What is seen in the intestine w/ hemorrhagic colitis?
Definition
Blood
Term
What is the most common cause of Hamburger dz?
Definition
E. coli O157:H7
Term
What is unique about E. coli O157:H7?
Definition
Acid-Resistant
Term
What are common vehicles for acid-resistant E. coli?
Definition
Undercooked minced beef patties
Term
What does E. coli cause in foals?
Definition
Septicemia
Term
What does E. coli cause in poultry?
Definition
Colibacillosis
Term
What does E. coli cause in cats?
Definition
UTI
Term
What does E. coli cause in mares & cattle?
Definition
Metritis
Term
What does E. coli cause in cows & sows?
Definition
Coliform mastitis
Term
What type of pathogen is E. coli?
Definition
Versatile, Opportunistic
Term
What are some urogenital tract inf's caused by E. coli?
Definition
Cystitis; Pyelonephritis; Metritis
Term
When E. coli is detected in the urogenital tract, is Aggln Test req'd?
Definition
No
Term
Describe Coliform mastitis due to E. coli.
Definition
Endotoxic injury: hemorrhage, edema; Endotoxemia --> Fever, off feed, sometimes fatal
Term
E. coli mastitis in pigs is ______.
Definition
Gangrenous
Term
How is E. coli dz diagnosed?
Definition
Culture feces, other specimens; Slide agglutination test for fecal cultures; Quantitative culture for urine (dogs, cats)
Term
What is the Tx for E. coli?
Definition
Fluid & electrolytes for diarrhea; Antibodies orally for diarrhea, IV for septicemia, Systemic & Local for bovine mastitis
Term
How is E. coli controlled?
Definition
Vaccinate dam (pigs, cattle); Ensure colostrum for neonates (incl. watery mouth in lambs); Improve hygiene & mgmt; Vaccinate cows to reduce severity of endotoxemia
Term
What vaccine can be given to cattle to reduce the effects of endotoxemia?
Definition
J5
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