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Category: Clinical Microbiology
Aerococcus, Abiotrophia, and Other Aerobic Catalase-Negative, Gram-Positive Cocci, Page 1 of 2
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This chapter examines clinically significant catalase-negative, Gram-positive cocci other than streptococci, enterococci, and the obligately anaerobic Gram-positive cocci. These bacteria form a taxonomically diverse collection of organisms that are infrequently isolated from clinical specimens and that may be misidentified as other more well-known Gram-positive cocci. The chapter discusses their taxonomy, their clinical significance, and the phenotypic and molecular methods for identification of these organisms when encountered in clinical microbiology laboratories. The genera included are Abiotrophia, Aerococcus, Dolosicoccus, Dolosigranulum, Facklamia, Gemella, Globicatella, Granulicatella, Helcococcus, Ignavigranum, Lactococcus, Leuconostoc, Pediococcus, Vagococcus, and Weissella.
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Identification of catalase-negative, Gram-positive cocci that grow aerobically with cells arranged in pairs and chains. Abbreviations: 6.5% NaCl, growth in broth containing 6.5% NaCl; bile esculin, hydrolysis of esculin in the presence of 40% bile; motility, motility in motility test medium; 45°C, growth at 45°C; 10°C, growth at 10°C; probe, reaction with commercially available nucleic acid probe for the genus Enterococcus; HIP, hydrolysis of hippurate; satellitism, satelliting growth behavior; ARG, arginine hydrolysis activity; BGUR, β-glucuronidase activity. doi:10.1128/9781555817381.ch24.f1
Identification of catalase-negative, Gram-positive cocci that grow aerobically with cells arranged in pairs and chains. Abbreviations: 6.5% NaCl, growth in broth containing 6.5% NaCl; bile esculin, hydrolysis of esculin in the presence of 40% bile; motility, motility in motility test medium; 45°C, growth at 45°C; 10°C, growth at 10°C; probe, reaction with commercially available nucleic acid probe for the genus Enterococcus; HIP, hydrolysis of hippurate; satellitism, satelliting growth behavior; ARG, arginine hydrolysis activity; BGUR, β-glucuronidase activity. doi:10.1128/9781555817381.ch24.f1
Identification of catalase-negative, Gram-positive cocci that grow aerobically with cells arranged in pairs, tetrads, clusters, or irregular groups. Abbreviations: 6.5% NaCl, growth in broth containing 6.5% NaCl; esculin, hydrolysis of esculin; BGUR, β-glucuronidase activity. doi:10.1128/9781555817381.ch24.f2
Identification of catalase-negative, Gram-positive cocci that grow aerobically with cells arranged in pairs, tetrads, clusters, or irregular groups. Abbreviations: 6.5% NaCl, growth in broth containing 6.5% NaCl; esculin, hydrolysis of esculin; BGUR, β-glucuronidase activity. doi:10.1128/9781555817381.ch24.f2
Possible identities of catalase-negative, Gram-positive cocci based on certain phenotypic reactions and cellular morphology a
Possible identities of catalase-negative, Gram-positive cocci based on certain phenotypic reactions and cellular morphology a