NEET BIOLOGY

Detailed explanation-1: -Staphylococcus is a genus of Gram-positive bacteria in the family Staphylococcaceae from the order Bacillales. Under the microscope, they appear spherical (cocci), and form in grape-like clusters. Staphylococcus species are facultative anaerobic organisms (capable of growth both aerobically and anaerobically).

Detailed explanation-2: -Streptococci are facultative anaerobic organisms or obligate anaerobes that are spherical or ovoid and found in pairs or chains.

Detailed explanation-3: -Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli, and spiral-shaped bacteria are spirilla.

Detailed explanation-4: -S. aureus cells are Gram-positive and appear in spherical shape. They are often in clusters resembling bunch of grapes when observed under light microscope after Gram staining. The name ‘Staphylococcus’ was derived from Greek, meaning bunch of grapes ( staphyle ) and berry ( kokkos ) [1].