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Category: Bacterial Pathogenesis
Uncommon Enterobacterial Genera Associated with Clinical Specimens, Page 1 of 2
< Previous page | Next page > /docserver/preview/fulltext/10.1128/9781555817541/9781555813420_Chap20-1.gif /docserver/preview/fulltext/10.1128/9781555817541/9781555813420_Chap20-2.gifAbstract:
Cedecea can be separated from other members of the Enterobacteriaceae by negative tests for lysine decarboxylase (LDC), gelatinase, and deoxyribonuclease; their inability to ferment L-arabinose and L-rhamnose; and a positive test for arginine dihydrolase (ADH). In addition, some strains of Cedecea produce what is described as a distinctive potato-like odor (actually a rather pungent, unpleasant, musty smell), a trait they share with Serratia odorifera. Ewingella americana is also thought to be a possible cause of internal stipe necrosis, a browning disorder of the cultivated mushroom Agaricus bisporus. In 1981, the Centers for Disease Control and Prevention (CDC) redefined the genus Kluyvera and proposed it for a group of organisms known as enteric group 8. Kluyvera spp. utilize a wide number of substrates, ferment most sugars, and must be separated from other indole-positive, Voges-Proskauer (VP)-negative members of the Enterobacteriaceae. Typical of most enteric bacteria, Leminorella grows well on isolation media. As it does not ferment lactose or sucrose and is H2S positive, it produces colorless colonies with or without a black center resembling Salmonella. In 1986, researchers isolated three strains from 400 diarrheal stools with a medium specifically designed for Moellerella. Rahnella has been shown to be the most abundant nitrogen-fixing bacterium isolated from the rhizosphere of wheat and maize, one of two dominant bacteria present on grasses, and isolated from carrots.
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Taxonomic recap of miscellaneous genera in this chapter a
Taxonomic recap of miscellaneous genera in this chapter a
Identification of miscellaneous Enterobacteriaceae by 10 commercial systems a
Identification of miscellaneous Enterobacteriaceae by 10 commercial systems a