Blood cultures drawn when she was admitted grew three organisms: Staphylococcus aureus, Peptostreptococcus anaerobius, and Gram-positive cocci in chains. The Gram-positive cocci had pinpoint growth, ...

These bacteria are Gram-positive cocci about 0.5 – 1.0 μm in diameter. They are present as grape like clusters. They may also occur in pairs and occasionally in short chains.

Gram-positive bacteria can cause a range of infections, from food poisoning to serious respiratory diseases. Some Gram-positive bacteria produce toxins that can cause lethal illnesses.

Gram stain showed a positive predictive value (PPV) of 84.7% for gram-negative rods in urine culture; however, the PPV was only 38.4% for gram-positive cocci.

Anaerobic isolates were tested for bacterial inhibitory activity. Of 144 isolates, 102 were from oropharyngeal washings, and 42 were from clinical specimens. Thirteen facultative bacterial species ...