What does Nonfermenting mean?
Non-fermenters (also non-fermenting bacteria) are a taxonomically heterogeneous group of bacteria of the division Proteobacteria that cannot catabolize glucose, and are thus unable to ferment. They are non-sporulating bacteria and Gram-negative.
Which bacteria Cannot ferment glucose?
The glucose non-fermenting, Gram-negative bacteria use glucose oxidatively or not at all. The genera Pseudomonas, Bordetella and Moraxella, which include significant veterinary pathogens, belong to this category and these are described in other chapters.
What types of infections do Nonfermenters cause?
These organisms survive in the environment for extended periods and are reported to cause bacteremia, meningitis, pneumonia, and urinary tract and surgical wound infections in humans and companion animals.
Is Haemophilus non fermenter?
Two large groups, Enterobacteriaceae and the non-fermenters, are responsible for most clinical isolates; nevertheless, other clinically concerning gram-negative organisms exist, including Neisseria, Haemophilus spp., Helicobacter pylori, and Chlamydia trachomatis.
Is Pseudomonas aeruginosa a Nonfermenter?
Pseudomonas aeruginosa was the most common nonfermenter, accounting for 53.8%, followed by Acinetobacter baumannii (22.2%), and Pseudomonas fluorescens (10.8%).
What fermented bacteria?
Bacterial fermentation is a metabolic process in which bacterial cells use a chemical substrate to generate adenosine triphosphate (ATP), which is necessary for energy production and cell growth.
Can E coli ferment lactose?
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.
Which Nonfermenters are most commonly isolated from patients with CF?
Pseudomonas aeruginosa (PSA) remains the most common non-fermenting gram-negative bacteria isolated from CF respiratory infections.
What is non Saccharolytic?
Non saccharolytic (Negative OF result): Nonsacchrolytic bacteria give a negative OF result. The negative result is indicated by no color change in the oil-covered tube and in some cases an increase in pH (pH 7.6) changing the bromthymol blue from green to blue in the top of the open tube.
What is NLF in microbiology?
In recent years, a progressive growth in the incidence of bacteremia caused by non-lactose fermenting gram-negative bacilli (NLF GNB) has been observed. NLF GNB led to high mortality among SOT recipients with bacteremia and were difficult to treat because of their high drug resistance to commonly used antibiotics.
Which Nonfermenter is most frequently isolated in a clinical setting?
Results: A total of 193 NFGNB were isolated from 189 clinical specimens. Pseudomonas aeruginosa was the most common nonfermenter, accounting for 53.8%, followed by Acinetobacter baumannii (22.2%), and Pseudomonas fluorescens (10.8%).