Exam questionKROK 1Medicine ยท 2010
In order to determine toxigenicity of diphtheria bacilli a strip of filter paper impregnated with antitoxic diphtherial serum was put on the dense nutrient medium. There were also inoculated a mi-crobal culture under examination and a strain that is known to be toxigenic. If the microbal culture under examination produces exotoxin, this wil result in formation of:
Answer options
- Haemolysis zones
- Precipitin ring
- Zones of diffuse opacification
- Precipitin lines
- Zones of lecithovitellinous activity
Correct answer
Precipitin lines
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