practical exercises

Illustrations of bacteria

  • StaphylococcusGram positive cocci in singles, pairs, short chains and irregular grape like clusters.
  • StreptococcusGram positive cocci in long chains.
  • Streptococcus pneumoniaePneumococcus: Gram positive lanceolate cocci in pairs (diplococci).
  • Streptococcus pneumoniaeGram positive capsulated lanceolate cocci in pairs (diplococci) against a dark background. Negative staining by Nigrosin.
  • Neisseria gonorrhoeaeGonococcus: Gram negative kidney-shaped cocci in pairs (diplococci) occuring intracellularly and extracellularly.
  • Bacillus anthracisGram positive spore bearing bacilli occuring in chains.
  • Clostridium tetaniGram positive bacilli with terminal spherical spore (drumstick appearance).
  • Mycbacterium lepraePink coloured bacilli in clumps (globi) seen intracellularly and extracellularly. Stained by modified Ziehl Neelsen technique.
  • slider html5Pink coloured bacilli in singles or clumps along with many pus cells and few epithelial cells. Stained by Ziehl Neelsen method of acid fast staining.
  • ActinomycosisTissue section stained by H&E showing central mass (granule) surrounded by inflammatory cells.
Staphylococcus1 Streptococcus2 Streptococcus pneumoniae3 Streptococcus pneumoniae4 Neisseria gonorrhoeae5 Bacillus anthracis6 Clostridium tetani7 Mycbacterium leprae8 Mycobacterium tuberculosis9 Actinomycosis10
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