acid-fast

However, Ziehl-Neelsen stains were negative for acid fast bacilli (Fig.

The organism's acid-fast nature can commonly result in a misidentification of other acid fast bacterium such as M.

CT guided biopsy of an index lung lesion stained positive for acid fast bacilli with caseating granulomas, which was diagnosed Mycobacterium avium intracellulare (MAI) complex.

Also used was acid fast bacterium Mycobacterium smegmatis, the yeast Candida albicans and the mold Aspergillus niger.

This revealed miliary tuberculosis with diffuse granulomatous disease, caseation necrosis, and acid fast organisms identified at multi-organ sites including the liver, lungs, kidneys and adrenal glands.

Unlike Actinomyces organisms, nocardiae are weakly acid fast.

It is important to distinguish oocysts from artifacts that may be acid fast but do not have the all-important wrinkled internal morphology.