Candida tropicalis

Structure and Physiology

Candida tropicalis is a yeast that is closely related and often forms in biofilms with C. albicans

Staphylococcus epidermidis (MRSE)

Structure and Physiology

This bacteria is a Gram-positive, cocci-shaped, facultative anaerobe which is resistant to the penicillin-derivative antibiotic methicillin. S. epidermidis is part of normal human bacterial flora and is mostly located on skin.

Transmission and Disease

 It is an opportunistic and pathogenic; infections caused by this bacteria can be very difficult to treat.

Disinfection

Most Staphylococcus species are hardy microorganisms capable of surviving on surfaces and under dry conditions.

Notes

Staphylococcus aureus (MRSA)

Structure and Physiology

Methicillin-resistant Staphylococcus aureus (MRSA) is a Gram-positive, coccal-shaped, facultative anaerobic bacterium that is responsible for many difficult to treat infections. MRSA is any strain of Staphylococcus aureus that has developed a resistance to beta-lactam antibiotics through the process of natural selection. Beta-lactam antibiotics include penicillin, methicillin, dicloxacillin, nafcillin, oxacillin, and cephalosporins. Resistance does not increase the virulence of the microbe but does make it more difficult to treat.

Staphylococcus aureus

Structure and Physiology

Staphylococcus aureus is a Gram-positive, coccal-shaped, facultative anaerobic bacterium. During binary fission, the two daughter cells that are produced do not completely separate. Incomplete separations of the cells result in the cluster formation. S. aureus is a catalase-positive bacterium that is able to combat the electronegative oxidizing effects of reactive oxygen species (ROS).