Disclaimer:

The treatment offered here is for medical professional’s note and not a prescription for a specific patient. Don’t take medicines without a doctor’s prescription. Incorrect medication can cause severe health issues and even death.

Remember that S. Pneumonia is a single species while S. Viridans is a large group of species.

Category

Morphology

S. Pneumoniae

Lancet shaped

S. Viridans

Elongated, oval, or rounded

Capsule

Present

Absent

Quellung Test

Positive

Negative

Gram Stain

Gram positive

Gram positive

Bile Solubility

Soluble

Insoluble

Optochin Sensitivity

Sensitive

Resistant

Hemolysis

Beta hemolytic

Alpha Hemolytic or non hemolytic

Lancefiled Class

None

None

Important Diseases

C-MOPS.

Conjunctivitis

Meningitis

Otitis Media

Pneumonia

Sinusitis

Penicillin (resistance is common 40%
or more patient are resistant)

Subacute infective endocarditis (SBE)

Dental Carries

Liver and Brain Abscesses

SBE (S. Viridans)

IV Benzyl Penicillin 1.2 g 6 times daily

Treatment

Ceftriaxone (not in children < 2 years)

Cefotoxime in children < 2y
Vancomycin

4 weeksIV Gentamicin 1 mg/Kg 3 times daily

2 to 4 weeks Mind the penicillin allergies.

Here is a visual mnemonic for you. Can you find the two pathogens?

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