![]() enterococci often show more antibiotic resistance than group D streptococci Streptococcus pneumoniae can be differentiated best from the viridans group of streptococci by:ĭ. enterococci often show more antibiotic resistance than group D streptococci d. several enterococci cause sever puerperal sepsisĭ. viridans streptococci are often confused with enterococciī. latex antigen typing It is important to differentiate between Enterococcus and group D streptococci because:Ī. group B Group B, beta-hemolytic streptococci may be distinguished from other hemolytic streptococci by which of the following procedures?ĭ. group A A beta-hemolytic Streptococcus that is bacitracin-resistant and CAMP-positive is:ĭ. Streptococcus agalactiae A beta-hemolytic streptococci that is bacitracin-sensitive and CAMP-negative is:ĭ. acute glomerulonephritis A gram-positive coccus isolated from a blood culture has the following characteristics: optochin susceptibility: negative/ bacitracin (0.04 U) susceptibility: negative/ bile esculin hydrolysis: negative/ hippurate hydrolysis: positive/ catalase: negativeĭ. growth of 6,800 colonies/mL of a Streptococcus, esculin hydrolysis and NaCl growth test to follow Children who have infection with beta-hemolytic streptococci can develop:ĭ. growth of 6,800 colonies/mL of a Streptococcus species, no further testing c. growth of 6,800 colonies/mL of a Streptococcus, esculin hydrolysis and NaCl growth test to followĭ. growth of 6,800 colonies/mL of a Staphylococcus species, coagulase test to followĬ. growth of 680 colonies/mL of gram-positive cocci, optochin and bacitracin susceptibility tests to followī. The preliminary report and follow-up testing would be:Ī. Testing reveals small gram-positive, catalase-negative cocci. After 48 hours, 68 colonies of a small translucent nonhemolytic organism grew on blood agar but not MacConkey. a penicillin derivative and an aminoglycoside A catherized urine is inoculated onto blood and MacConkey agar using a 0.01 mL loop. a macrolide and a penicillin derivative b. a cell membrane active agent and nalidixic acidĭ. a penicillin derivative and an aminoglycosideĬ. Staphylococcus epidermidis Which of the 2 different antimicrobial agents listed below are commonly used and may result in synergistic action in the treatment of endocarditis caused by Enterococcus faecalis?ī. Streptococcus pyogenes Of the following bacteria, the most frequent cause of prosthetic heart valve infections occurring within 2-3 month after surgery is:ĭ. group B streptococci An important cause of acute exudative pharyngitis is:Ī. growth in 6.5% NaCl broth The organism most commonly associated with neonatal purulent meningitis is:ĭ. Which of the following tests would help to determine if the organism is Enterococcus?ĭ. perform a Streptococcus group typing A beta-hemolytic steptococcus that has been isolated from an ear culture grows up to the edge of a 0.04 unit bacitracin disk. ![]() report the organism as Staphylococcus epidermidis a. report the organism as Staphylococcus aureusĭ. report the organism as Streptococcus pneumoniaeĬ. ![]() Biochemical test results of a pure culture are: bacitracin: resistant///CAMP reaction: positive/// bile esculin: not hydrolyzed/// 6.5% NaCl broth: no growthĪssuming that all controls react properly and reactions are verified, the next step would be to:ī. The bacterial colonies are small, translucent and beta-hemolytic on a blood agar plate. in the genera Granulicatella and Abiotrophia After 24 hours a blood culture from a newborn grows catalase-negative, gram-positive cocci. in the genera Granulicatella and Abiotrophia d. "Nutritionally deficient" streptococci are:ĭ. ![]()
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