Enumerar las principales especies pertenecientes a la familia Enterobacteriaceae, señalando su importancia en salud publica y en los laboratorios farmacéuticos Familiarizarse con las caract…Descripción completa
extremely strong cross-reactivity with Shigella dysenteriae.
PROTEUS :
MORPHOLOGY • shape : rod • Gram Negative • motile
CULTURE • Facultative anaerobes • Do not form endospores • Exhibit swarming behavior - form concentric rings as they spread across the surface of agar plates.
SEROLOGY • Treatment with ampicillin and aminoglycosides
Belong to gammaproteobacteria Gram negative Non-spore forming Rod-shaped bacteria Mostly surrounded by flagella Motile Facultative anaerobes Culture
Most will grow in wide temperature range in ordinary culture media including nutrient agar and blood agar. On BA, enterobacteria produce large, shiny, grey colonies that may be haemolytic. A coliform & fecal coliform
Biochemical test
Indole test: posite. Ability to convert tryptophan to indole. ferment lactose, and use malonate.
Serology test
Some produce Vi (virulence) antigen
K.pneumoniae
morphology
- gram ngtve bact -non motile -slimy grayish white colonies on NA/muccoid appearance -small size ( 1-2 um) coccobacilli capsulated -arranged in pairs n cluster
culture
-facultative anaerobes -growth on NA - produce distinctive yeasty odor serology test - prodce nzyme (carbapenemase) makes it ressintant to drug carbapenem -inhibit growth of similar related strains bact by prodcng proteinaceous toxins
biochemical test -gram stain (-ve) -simmon citrate agar (+ve)