Diseases Caused By E. coli

Question 1

Neonatal diarrhea in piglets

Answer 1

• mortality high
• affects piglets less than 1yr
• causes watery diarrhea, severe dehydration
• endotoxins involved STa, STb, LT

Question 2

Piglet meningitis

Answer 2

• occasional septicemia caused by invasive strains
• causes piglet death within first 48 hrs of birth

Question 3

Weaning enteritis (collibacillosis)

Answer 3

• abt 2 wks after weaning
• causes diarrhea, anorexia, & fever (maybe acute meningitis and fibrous polyserositis)
• lower mortality than neonatal piglets
• enterotoxins STa, STb, LT

Question 4

Edema dsease

Answer 4

• weaning pigs
• sudden death often
• forehead, eyelids, stomach wall, and larynx edema
• can see ataxia, convulsions, and paralysis may be seen
• toxin involved: shiga toxin(Stx2e) & assc. w/ E. coli O139 and O141

Question 5

Coliform mastitis

Answer 5

• sows after farrowing
• 1+ mammary glands affected

Question 6

Mastitis-meitritis-agalactica syndrome

Answer 6

• gilts post-farrowing
• involves stress, hormonal imbalance, and coliform infection

Question 7

White scours (colibacillosis) in cattle

Answer 7

• appetite decreases as feces become more fluid
• feces are white, pasty, and around anus
• dehydration & emaciation
• if left untreated, death in 4-5 days
• enterotoxin STa

Question 8

Colisepticemia

Answer 8

• sudden death due to endotoxin shock
• diarrhea, depression, resp. distress, death
• endotoxin is the principal toxin, and then cytotoxic necrotizing factor & cytolethal distending toxin

Question 9

Septicemia/bacteremia (joint illness)

Answer 9

• e. coli in joints and/or kidneys
• can enter via umbilicus
• calves

Question 10

Coliform mastitis

Answer 10

• dairy cows post-parturition
• peracute disease
• fever, anorexia, depression, sunken eyes, death due to endotoxin shock
• less severe form more common

Question 11

Collibacillosis and coliscepticemia in ovines

Answer 11

• neonatal lambs
• similar to calves, less common
• same enterotoxic and enteropathogenic strains as collibacillosis

Question 12

Watery mouth (ovine)

Answer 12

• neonatal lambs
• dull and anorectic
• hypersalivation
• abd. Tympani
• splashing sounds in abomasum
• death within 6 to 24 hrs
• e. Coli endotoxemia

Question 13

Colisepticemia (k9)

Answer 13

• neonatal pups
• often fatal

Question 14

Pyometra (k9)

Answer 14

• assc. W/ progesterone-stimulated endometrium
• vaginal discharge 4-8 wks after oestrus
• in the closed cervix version, dog is toxaemic

Question 15

UTI (K9)

Answer 15

• Adults
• cystitis (females) most common
• e. Coli can ascend higher into urinary tract
• bacteriuria= >105 e. Coli per mL urine

Question 16

Omphalitis (chx)

Answer 16

• young chicks
• infection of vestigial yolk sac
• contents are dark, stinky, and fluid
• aka “mushy yolk disease”

Question 17

Colisepticemia (chx)

Answer 17

• all ages
• primary or secondary infection via intestines or resp tract
• many organs infected, ie air-sacculitis, peritonitis, and ovarian infection

Question 18

Coligranuloma (chx)

Answer 18

• chronic
• can follow colisepticemia
• nodules in liver and intestines

Question 19

Colibacillosis in foals & rabbits

Answer 19

• neonatal
• diarrhea
• septicemia
• less common than in cows and pigs