# Laboratory test of ANUG is:
A. Complement fixation
B. Dark field examination
C. Tissue culture
D. Animal inoculation
The correct answer is B. Dark field examination.
- Dark field microscopy is used to examine live microorganisms that are invisible in ordinary light and cannot be stained by ordinary methods.
- It is used to study the motility in case of spirochetes.
- In ANUG, dark field microscopy, helps in visualizing the spirochetal and treponemal organisms.
- Silver impregnation technique and dark field microscopy are done to visualize spirochetes during laboratory examination.
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