Washwater containing Pseudomonas was sterilized and used to wash cardiac cathete
ID: 165495 • Letter: W
Question
Washwater containing Pseudomonas was sterilized and used to wash cardiac catheters. Three patents developed fever, chills, and hypotension following cardiac catheterization. The water and catheters were sterile. Why did the patients show these symptoms? What three genera of organisms are most likely to produce enzymes which increase their virulence? PLASMIDS and LYSOGENY Plasmids often carry genes to increase virulence Lysogenic conversion Changes the characteristics of a microbe Make it immune to reinfection by same virus Some bacteria are pathogenic only because of the prophage they contain. A plasmid in a bacterial cell can increase that organism's virulence. Name 5 instance when a plasmid gene codes for a virulence factor. Name six diseases that are due to the lysogenic conversion of the causative bacteria.Explanation / Answer
10. Pseudomonas are gram negative bacteria most commonly found in the environment. They tend to affect the individuals with compromised immunity.
11. Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa produce enzymes to increase virulence.
12. pCoo encodes serine protease to increase virulence. Also pBR322 plasmid contains a gene which offers virulence factor. PAIs are clusters of genes that code for virulence factors found in bacterial chromosomes.
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