Microbiology CSMLS Review Questions With 100% Correct Answers!!

The pulmonary form of anthrax is known as - Valley fever - Walking pneumonia - Farmers' lung - Woolsorters disease - Answer-Woolsorters disease Streptococci are unable to synthesize the enzyme - Catalase - Kinase - Hyaluronidase - Lipase - Answer-Catalase (Organisms that synthesize the enzyme catalase are able to protect themselves from the killing effects of H2O2 by converting it to H2O and O2. Streptococci are unable to do this) Which of the following is NOT appropriate when describing Streptococcus pneumoniae - Bile-resistant - Alpha hemolytic - Lancet-shaped, Gram positive diplococcus - Virulent strains are encapsulated - Answer-Bile-resistant Streptococcus pyogenes can be presumptively ID'd using a(an) - PYR disk - ONPG disk - SPS disk - Optochin disk - Answer-PYR disk (The ID of Group A strep can be achieved through the PYR disk test)A gram positive coccus that is catalase positive, nonmotile, lysostaphin resistant, and modified oxidase positive is best identified as - Micrococcus - Lactococcus - Streptococcus - Staphylococcus - Answer-Micrococcus (Staphylococci and Micrococci are both Catalase positive. Micrococci are oxidase positive, whereas staphylococci are negative) In the CAMP test, a single streak of streptococcus is placed perpendicular to a streak of Staph. aureus. After incubation, a zone of increased lysis in the shape of an arrow is noted. This indicates? - S. agalactiae - S. bovis - S. equinus - S. pyogenes - Answer-S. agalactiae (They can be presumptively ID'd by the demonstration of a CAMP reaction) Staphylococcus saprophyticus, a recognized pathogen, is a cause of - Furuncles - Impetigo - Otitis media - UTI - Answer-UTI (The recovery rate of coagulase-negative Staph saprophyticus from the urinary tract infections in young females is second only to that of E.coli) Exfoliatin produced by Staphylococcus aureus is responsible for causing - Enterocolitis - Toxic shock syndrome - Scalded skin syndrome - Staphylococcal pneumonia - Answer-Scalded skin syndrome (Scalded skin syndrome is a form of dermatitis produced by Staph. aureus)The etiologic agent most commonly associated with septicemia and meningitis of newborns is - S. agalactiae - S. bovis group - S. pneumoniae - S.pyogenes - Answer-S. agalactiae (This organism is part of the indigenous microbial flora of the vagina) A common member of the normal flora of the upper respiratory tract is - Corynebacterium jeikeium - Lactobacillus - Staphylococcus epidermidis - Viridans streptococcus - Answer-Viridans streptococcus (They are the most common NF in upper respiratory cultures and are opportunistic pathogens) Streptococci obtain all their energy from the fermentation of sugars to - Formic acid - Lactic acid - Succinic acid - Valeric acid - Answer-Lactic acid (whether growing aerobically or anaerobically, streptococcus obtain all their energy from the fermentation of sugar to lactic acid) The production of H2S is one characteristic used to differentiate which of the aerobic gram-positive bacilli? - Corynebacterium - Erysipelothrix - Lactobacillus - Nocardia - Answer-Erysipelothrix