Pseudomonas aeruginosa produces several enzymes and toxins that account for its virulence. Pseudomonas aeruginosa – has the most clinical significance Many species produce a water-soluble pigment and appear mucoidĪ few of the more important species include.ġ.Straight or slightly curved Gram-negative rods.As a group they have the following characteristics: Because these Gram-negative bacilli survive well in many environments in nature and in homes and hospitals, they are commonly encountered in the clinical laboratory. PSEUDOMONAS: is a genus of Gram-negative bacilli commonly found in the environment and some species are successful opportunistic pathogens. coli allow it to adhere to tissues in the urinary tract and keep it from being voided with the urine. Member of Enterobacteriaceae that are capable of causing disease, have virulence factors such as adhesins and exotoxins.
pneumoniae, which causes pneumonia in alcoholics and people with compromised pulmonary function. Klebsiella: normal gut flora, can be an opportunistic pathogen.Salmonella: typhoid fever, gastroenteritis.Proteus: opportunistic pathogen causing urinary tract infections (renal stones) Escherichia coli is the most medically relevant species and is associated with diseases such as meningitis and urinary tract infections.Ģ. Escherichia: normal gut flora, fecal indicator, can be an opportunistic pathogen. If motile - flagella are peritrichous (all around the cell)ġ.Usually have simple nutritional needs (non-fastidious) As a group they have the following characteristics:ģ. However, various strains of these bacterial groups can cause severe gastrointestinal disease. They typically inhabit the colon of warm-blooded animals as normal flora. As a group they are commonly called enterics.
THE VIRTUAL EDGE: Lab 15 Enzyme-Mediated Biochemical Activities of Bacteria: Physiological Testing IĮNTEROBACTERIACEAE is a large family of bacteria that consists of more than two dozen genera.
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