| A | B |
|---|
| Gram + cocci in clusters; SSSS | Staphylococcus aureus |
| Gram + cocci in chains, Meningitis in newborns | Streptococcus agalactiae |
| Gram + cocci in chains, meningitis in adults | Streptococcus pneumoniae |
| Gram + cocci in chains, erysipelas | Streptococcus pyogenes |
| Gram + cocci in chains, subacute endocarditis | Streptococcus sanguis/S. oralis |
| Gram + bacillus; meningitis in adults & newborns | Listeria monocytogenes |
| Gram + bacillus, gas gangrene | Clostridium perfringens |
| Gram + bacillus, lock jaw | Clostridium tetani |
| Gram + bacillus, food poisoning | Clostridium botulinum |
| Gram – bacillus; meningitis in 1-6 yr olds | Haemophilus influenzae |
| Gram - bacillus; meningitis in newborns | Escherichia coli |
| Gram – diplococci; most serious meningitis | Neisseria meningitidis |
| Gram – diplococci; neonatal conjunctivitis | Neisseria gonorrhoeae |
| Spirochete; Lyme disease | Borrelia burgdorferi |
| Gram stain not useful; conjunctivitis in newborns | Chlamydia trachomatis |
| Mold; tinea skin infections | Trichophyton, Microsporum, Epidermophyton |
| Mold with spores in rectangle shapes called arthrospores; meningitis | Coccidioides immitis |
| Yeast with capsule – visible in India Ink preparation of cerebral spinal fluid (CSF) | Cryptococcus neoformans |
| Primary Amoebic Meningoencephalitis | Naegleria fowleri |
| Granulomatous Amoebic Meningoencephalitis | Acanthamoeba |
| Sporozoan; Zoonosis related to cats | Toxoplasma gondii |
| Gram + cocci in clusters; normal skin flora | Staphylococcus epidermidis |
