Which bacterial virulence factor is strongly associated with neonatal diarrhoea caused by enterotoxigenic Escherichia coli in calves?
Correct answer: D. F5 or K99 fimbrial adhesion
- A. Capsular swelling by hyaluronic acid
- B. Tetanus neurotoxin production
- C. Mycolic acid formation
- D. F5 or K99 fimbrial adhesion
Explanation
F5, also called K99, fimbriae allow enterotoxigenic E. coli to attach to receptors on the neonatal calf intestine. Attachment is followed by enterotoxin-mediated fluid secretion, whereas the other listed factors belong to different pathogens or diseases.
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