These Gram-positive pleomorphic bacteria are toxin producers that cause formation of a pseudomembrane in the throat that can restrict airflow. This pathogen is
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- Which of the following is not an opportunistic enteric bacterium?a. Serratia b. Klebsiella c. Proteus d. Shigellawhat practical importance are air-borne microorganisms to the laboratory workers? What precautions should be taken to control laboratory contaminants?Within a 3-day period at a large hospital, five patients undergoing hemodialysis developed fever and chills. Pseudomonas aeruginosa and Klebsiella pnuemoniae were isolated from three of the patients. P. aeruginosa, K. pneumoniae, and Enterobacter agglomerans were isolated from the dialysis system. Why do all three bacteria cause similar symptoms?
- If an acid-fast bacterium is detected in a clinical sample, thenthe organism could bea) Cryptococcus neoformans .b) Mycobacterium tuberculosis .c) Neisseria gonorrhoeae .d) Streptococcus pneumoniae .e) Streptococcus pyogenes .Why is Salmonella typhi a gram negative bacilli? Explain.What are all the different types of infections the following antibiotic resistant microbes associated with Carbapenme-Resistant Enterobacteriaceae (CRE), Vancomycin-resistant Enterococcus (VRE), Methicillin-Resistant Staphylococcus aureus (MRSA) and Vancomycin-Resistant Staphylococcus aureus (VRSA)?
- Why are Bacillus infections commonly associated with exposureto soil and dust?Which of the following is capable of oxidizing elemental sulfur to sulfates? Bacillus GSB and PSB Thiobacillus Rhodospirillum Desulfotomaculum Rhodomicrobium AzotobacterWhat are the common pathogens isolated from stool samples? What is the difference between a coliform bacterium and a noncoliform enteric bacterium? What diagnostic test differentiates Proteus and Providencia species from other Enterobacteriaceae? How would you differentiate between serotypes of E. coli? Are the gram-negative enteric bacilli fastidious organisms? Would they survive well outside of the body? If so, what significance would this have in their transmission? Why is serotyping particularly important in Salmonella infections and typhoid fever?
- Identify the genus that best fits each of the following descriptions: a. This organism can produce a fuel used for home heating and for generating electricity. b. This gram-positive genus presents the greatest source of bacterial damage to the beekeeping industry. c. This gram-positive rod is used in dairy fermentations. d. This gammaproteobacterial genus is well suited to degrade hydrocarbons in an oil spill.At autopsy, the most prominent findings were bronchopneumonia with focal organization and hemorrhage in the right lung. Stains of the lung tissue were negative by Gram, methenamine silver, and acid-fast methods, but Dieterle silver stains revealed short bacilli. Lung cultures yielded Gram-negative bacilli, which grew aerobically on buffered charcoal-yeast extract, but not on blood or chocolate agar. The organisms resembled Legionella, but failed to stain with immunofluorescence conjugates for Legionella pneumophila and multiple other species (L minded, L longbeachae, L gormanii, L dumoffi, L bozemanii). The organism was sent to the Centers for Disease Control and Prevention, where it was eventually identified as a new species of Legionella. What is the most probable source of this man's infection? Family member Water Food Insect Bioterrorism Dark-field microscopy may be used to diagnose spirochetes in which of the following scenarios? To detect spirochetes in the blood of a…clostridium botulinum is a bacterium usually present in soil that may cause botulism. Briefly explain why one or few cells of a pathogenic bacterium, such as clostridium botulism, by itself typically does not secrete a toxin, despite the species as a whole being characterized as toxin producing.