Microm 443 Midterm Question and answers correctly solved 2024/2025

Microm 443 Midterm Question and answers correctly solved 2024/2025Staphylococcus aureus - correct answer Gram reaction: Gram positive cocci in clusters, tetrads and pairs Cell morphology: coccus Colony morphology: medium to large, white/creamy -> gold, possibly B-hemolytic Identification: B-hemolytic, catalase positive, most likely novobiocin sensitive, coagulase positive Normal Samples: carried in nose/nasal passage and skin of 10-40% of people Clinical samples: skin/hair follicle infection, wound infection, sputum (pneumonia), blood (sepsis) Media: Most agar (nutrient, TSY, blood, chocolate, etc.) How to distinguish: coagulase positive Staphylococcus saprophyticus - correct answer Gram reaction: Gram positive cocci in clusters, tetrads and pairs Cell morphology: coccus Colony morphology: small, white colonies with no hemolysis Identification: (no hemolysis) catalase positive, coagulase negative, novobiocin resistant Normal Samples: normal flora of female genital tract, normal flora of intestinal tract