Is Citrobacter Freundii a lactose fermenter?

Asked By: Romana Beirle | Last Updated: 16th June, 2020
Category: medical health infectious diseases
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Displayed higher classification: Enterobacteria

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Considering this, do all Enterobacteriaceae ferment lactose?

Lactose usually is fermented rapidly by Escherichia, Klebsiella and some Enterobacter species and more slowly by Citrobacter and some Serratia species. Proteus, unlike the coliforms, deaminates phenylalanine to phenylpyruvic acid, and it does not ferment lactose. Typically, Proteus is rapidly urease positive.

Subsequently, question is, does Citrobacter Freundii ferment glucose? All strains ferment glucose under acid production and about 90% of them also under gas production.

Additionally, what is Citrobacter Freundii in urine?

[1,2] The genus Citrobacter is distinct group of aerobic, gram negative bacilli from the Enterobacteriaceae family, widely distributed in water, soil, food and intestinal tract of man and animals. UTIs caused by Citrobacter species have been described in 5 to 12% of bacterial urine isolates in adults.

What antibiotics treat Citrobacter Freundii?

Citrobacter freundii infection is usually treated with antibiotics like fluoroquinolones, carbapenems and cephalosporins.

37 Related Question Answers Found

How do I know if I have Enterobacter?

Tests for identification of members of Enterobacteriaceae family
  1. Citrate utilization Test.
  2. Indole Test.
  3. Motility Test.
  4. Methyl Red (MR) Test.
  5. Voges–Proskauer (VP) Test.
  6. Triple Sugar Iron (TSI) Agar Test.
  7. Urease Test.

What bacteria can ferment lactose?

Abstract. E. coli are facultative anaerobic, Gram-negative bacilli that will ferment lactose to produce hydrogen sulfide.

Is E coli lactose fermenting?

E. coli are facultative anaerobic, Gram-negative bacilli that will ferment lactose to produce hydrogen sulfide. Up to 10% of isolates have historically been reported to be slow or non-lactose fermenting, though clinical differences are unknown.

What is a gram negative infection?

Gram-negative bacteria cause infections including pneumonia, bloodstream infections, wound or surgical site infections, and meningitis in healthcare settings. Gram-negative infections include those caused by Klebsiella, Acinetobacter, Pseudomonas aeruginosa, and E. coli., as well as many other less common bacteria.

Is Enterobacter cloacae the same as E coli?


All Enterobacter species are found in water, sewage, soil, and vegetables. Enterobacter cloacae is the most frequently isolated Enterobacter species from humans and animals. Its role as an enteric pathogen has not been demonstrated. Enterobacter cloacae is less susceptible to chlorination than Escherichia coli.

What are 3 general characteristics of the Enterobacteriaceae?

Enterobacteriaceae is a family of Gram-negative, facultatively anaerobic, non-spore-forming rods. Characteristics of this family include being motile, catalase positive, and oxidase negative; reduction of nitrate to nitrite; and acid production from glucose fermentation.

How do you get Enterobacter?

The source of infection may be endogenous (via colonization of the skin, gastrointestinal tract, or urinary tract) or exogenous, resulting from the ubiquitous nature of Enterobacter species.

Can salmonella ferment lactose?

Salmonellae are facultative anaerobes and are catalase positive, oxidase negative and ferment glucose, mannitol and sorbotol to produce acid or acid and gas. Whilst S. arizonae is able to ferment lactose, this is the exception rather than the rule.

How is Citrobacter transmitted?

MODE OF TRANSMISSION: Citrobacter may be spread by direct contact with hospital staff members, mother to child transmission or through ingestion of environmental sources (fecal-oral route) but person-to-person transmission is more prevalent 7, 11.

Is Citrobacter Freundii common?


freundii infections. Although Citrobacter spp. are less commonly isolated, they are emerging as a common nosocomial multidrug-resistant pathogen, especially in developing countries. was the third most common urinary pathogen and 30% of the isolates were extended spectrum beta lactamase (ESBL) producers.

What disease is caused by Citrobacter Freundii?

freundii bacilli [9]. One fatal disease that C. freundii has been associated with is neonatal meningitis. Neonatal meningitis is the inflammation of the meninges (the system of membranes which surround the CNS) due to bacterial invasion [10].

Where is Citrobacter Freundii found?

freundii cells generally have several flagella used for locomotion, but some do not and are non-motile. C. freundii is a soil organism, but can also be found in water, sewage, food and in the intestinal tracts of animals and humans. The genus Citrobacter was discovered in 1932 by Werkman and Gillen.

Is Citrobacter h2s positive?

freundii is intrinsically resistant to ampicillin-sulbactam and cephalosporins. They can resemble Salmonella on agar media due to production of H2S by both genera. They are also citrate positive, however, only Citrobacter is positive for ONPG.

Is E coli Gram positive or negative?

Escherichia coli (commonly abbreviated E. coli) is a Gram-negative, rod-shaped bacterium that is commonly found in the lower intestine of warm-blooded organisms (endotherms). Most E. coli strains are harmless, but some serotypes can cause serious food poisoning in humans.

Where does Citrobacter Koseri come from?


Citrobacter koseri (formerly Citrobacter diversus) is a motile gram-negative bacillus usually arising from urinary and gastrointestinal tracts. C. koseri rarely causes infection in immunocompetent patients and, thus far, has been considered an opportunistic pathogen.

Is Citrobacter Koseri contagious?

Citrobacter koseri is a Gram-negative, non-spore-forming bacillus. It is a facultative anaerobe capable of aerobic respiration. It is motile via peritrichous flagella. It is a member of the family of Enterobacteriaceae.

Citrobacter koseri
Specialty Infectious disease

How is Citrobacter Koseri treated?

Various types of antibiotics, including amino- glycosides carbapenems, cephalosporins, chloramphenicol and quinolones, are used for the treatment of C. koseri infections. Treatment options can be monotherapy, with agents potentially active against Citrobacter spp. or combination therapy [8].