What Gram-negative rods are lactose fermenting?
What Gram-negative rods are lactose fermenting?
E. coli are facultative anaerobic, Gram-negative bacilli that will ferment lactose to produce hydrogen sulfide.
Are lactose fermenting bacteria motile?
MacConkey: Ferments lactose (striking pink colony). Glucose tube: Ferments glucose with gas production (yellow with a bubble in the Durham Tube). SIM: Does not produce H 2S gas, indole positive (rose ring), and may or may not be motile. SIM: Does not produce H 2S, indole negative, and non-motile.
Are Gram-negative rods motile?
Klebsiella, enterobacter, proteus and other enterobacteria ictaluri belong to a group of enterobacteria with distinctive properties, originally described as the ‘Asakusa group’. Members of the genus are small, motile, facultatively anaerobic Gram-negative rods.
What antibiotics treat Gram-negative rods?
These antibiotics include cephalosporins (ceftriaxone-cefotaxime, ceftazidime, and others), fluoroquinolones (ciprofloxacin, levofloxacin), aminoglycosides (gentamicin, amikacin), imipenem, broad-spectrum penicillins with or without β-lactamase inhibitors (amoxicillin-clavulanic acid, piperacillin-tazobactam), and …
Is Salmonella non lactose fermenting?
To differentiate Salmonella from other Enterobacteriaceae, bacteriologists use lactose fermentation as a key biochemical test. As early as 1887, it was known that Escherichia coli was a lactose fermenter and that Salmonella was not a lactose fermenter.
Do all Gram-negative bacteria ferment glucose?
This is a test commonly used when trying to identify Gram-negative enteric bacteria, all of which are glucose fermenters but only some of which produce gas. Escherichia coli is capable of fermenting glucose as are Proteus mirabilis (far right) and Shigella dysenteriae (far left).
What are the names of Gram negative rods?
LACTOSE FERMENTERS NON-LACTOSE FERMENTERS E. coli Klebsiella pneumoniae Eterobacter cloacae Oxidase negative Shigella* Salmonella* Proteus Serratia ENTERIC GNR Oxidase positive Pseudomonas aeruginosa, Burkholderia cepacia* YES NO ENTERIC GNR NON-ENTERIC GNR OXIDASE TEST *Not a urinary pathogen Title
What are some examples of non lactose fermenting bacteria?
Non lactose-fermenting (Lactose negative): ● Oxidase (-): Acinetobacter spp , Burkholderia spp, E. coli Proteus spp, Salmonella spp, Shigella spp, Serratia spp*, Stenotrophomonas maltophilia ● Oxidase (+): P. aeruginosa, Aeromonas spp. Anaerobic Bacteroides spp, Fusobacterium spp, Prevotella spp. ● Small, pleomorphic:
Which is an oxidase negative Gram negative fermenter?
coliforms (enterobacilli) Comprises the following bacterial groups Oxidase negative Enterobacteriaceae •a. Lactose-fermenters •Escherichia spp. •Klebsiella spp. •Enterobacter spp. •Citrobacter spp. •b. Non-lactose fermenters •Salmonella spp. •Shigella spp. •Proteus spp
What kind of Gram negative rods grow on MacConkey?
Figure 1 A BRIEF CLASSIFICATION OF GRAM NEGATIVE RODS Grow on MacConkey Agar LACTOSE FERMENTATION LACTOSE FERMENTERS NON-LACTOSE FERMENTERS E. coli Klebsiella pneumoniae Eterobacter cloacae Oxidase negative Shigella* Salmonella* Proteus Serratia ENTERIC GNR Oxidase positive Pseudomonas aeruginosa, Burkholderia cepacia* YES NO