Gram positive cocci in singles, pairs, short chains and irregular grape like clusters.
Gram positive cocci in long chains.
Pneumococcus: Gram positive lanceolate cocci in pairs (diplococci).
Gram positive capsulated lanceolate cocci in pairs (diplococci) against a dark background. Negative staining by Nigrosin.
Gonococcus: Gram negative kidney-shaped cocci in pairs (diplococci) occuring intracellularly and extracellularly.
Gram positive spore bearing bacilli occuring in chains.
Gram positive bacilli with terminal spherical spore (drumstick appearance).
Pink coloured bacilli in clumps (globi) seen intracellularly and extracellularly. Stained by modified Ziehl Neelsen technique.
Pink coloured bacilli in singles or clumps along with many pus cells and few epithelial cells. Stained by Ziehl Neelsen method of acid fast staining.
Tissue section stained by H&E showing central mass (granule) surrounded by inflammatory cells.
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