When those tests show the presence of Gram-positive cocci bacteria, suggesting a dangerous staph or strep infection, Pratt tries to obtain the powerful antibiotic ceftriaxone from the pharmacy.

Experts divide them into Gram-positive cocci or bacilli, depending on their shape. Gram-negative bacteria have different structures. They have a far thinner layer of peptidoglycan, which is why ...

They are gram positive bacteria that are small round in shape (cocci) and occur as clusters appearing like a bunch of grapes on electron microscopy. Staphylococcus were earlier divided into two ...