Coliforms - E. coli ), lower respiratory tract ( Klebsiella...

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Coliforms ORGANISM: Genus: Escherichia , Enterobacter , Klebsiella , Serratia , Cit robacter , Proteus Species: many GENERAL CONCEPTS: Collectively, this group of Gram-negative bacilli (with the exception of Proteus ) are referred to as "coliforms" because they share similar morphological and biochemical characteristics. With the exception of Proteus , these organisms ferment lactose, which is a useful characteristic for differentiating them from Salmonella and Shigella . Most of these organisms are members of the normal flora of humans and/or animals and are considered opportunistic pathogens. Diseases produced by the coliforms and Proteus can be grouped into three general categories: 1. Nosocomial or hospital-acquired infections: Forty percent of all nosocomial infections involve coliforms or Proteus . The primary sites for infection include the urinary tract ( E. coli ), surgical wound (
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Unformatted text preview: E. coli ), lower respiratory tract ( Klebsiella ), and primary bacteremia ( E. coli ). 2. Infections in compromised patients: E. coli is responsible for 40% of neonatal bacterial meningitis infections. 3. Community acquired infections: E. coli accounts for 85% of urethrocystitis cases, 80% of chronic bacterial prostatitis cases and 90% of acute pyelonephritis cases. Proteus , Klebsiella and Enterobacter may produce urinary tract infections. Proteus may also be responsible for some renal infection stones, due to the production of the enzyme urease and subsequent alkalinization and supersaturation of urine. In addition, K. pneumonia is responsible for approximately 3% of bacterial pneumonia cases and is more severe than that produced by S. pneumoniae . E. coli can also produce several different types of diarrheal disease...
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Coliforms - E. coli ), lower respiratory tract ( Klebsiella...

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