Ohio State Navbar

Quick Links

Microbiology Laboratory Terminology


Gram positive cocci in groups or clusters - Staphylococcus species

Gram positive cocci in chains - Streptococcus species or Enterococcus species

Gram positive diplococci - Streptococcus pneumoniae

Gram positive bacilli producing spores - Bacillus species

Gram positive bacilli not producing spores - Listeria monocytogenes, Corynbacterium species, Lactobacillus species, Nocardia

Anaerobic Gram positive bacilli producing spores - Clostridium species

Anaerobic Gram positive bacilli not producing spores - Propionibacterium, Actinomyces

Anaerobic Gram positive cocci - Peptostreptococcus

Lactose fermenting Gram negative bacilli - Enterobacteriaceae

Non-lactose fermenting Gram negative bacilli - non-Enterobacteriaceae

Non-lactose fermenting, oxidase negative Gram negative bacilli - Stenotrophomonas maltophilia

Non-lactose fermenting, oxidase negative Gram negative coccobacilli - Acinetobacter species or Haemophilus species

Non-lactose fermenting, oxidase positive Gram negative bacilli - Pseudomonas species

Branching Gram positive rods, modified acid fast stain positive - Actinomyces species or Nocardia species

Acid fast bacilli - Mycobacterium species

Budding yeast - Candida species or Cryptococcus species

Germ tube positive yeast - Candida albicans or Candida dublinesis

Germ tube negative yeast - Candida glabrata, Candida tropicalis, Candida parapsilosis, Candida krusei

Fungal elements or hyphal elements - mold