Weil-Felix is a nonspecific agglutination test that detects anti-rickettsial antibodies in patient’s serum. Weil-Felix test is based on cross-reactions that occur between antibodies produced in acute rickettsial infections with antigens of OX (OX 19, OX […]
Instructions for female patients to collect midstream urine for bacterial culture Remove undergarments. Wash hands thoroughly with soap and water, rinse them, and dry them on a disposable paper towel or shake off excess water. […]
Prophylaxis: Vaccines are available for yellow fever and Argentine hemorrhagic fever that can protect against these diseases to some extent. Prevention of Viral Hemorrhagic Fever can be achieved by either control of rodents, or protecting from bite […]
Bacterial Transformation is one of the three horizontal gene transfer mechanism found in Bacterial cells. The other two horizontal gene transfer mechanism are conjugation (Transfer of F Plasmid & Transfer of Chromosomal DNA) and transduction […]
The F+ strain which contains plasmid gene as an episome (i.e. F plasmid becomes integrated into the host cell genome at one of the several possible sites chromosomal gene) induce more than thousand times the number of […]
Conjugation is one the three mechanism of DNA exchange between bacteria, the other being transformation and transduction. Conjugation occurs between two living cells, involves cell to cell contact, and requires mobilization of either a plasmid […]
In bacterial population DNA can be transferred from one organism to another by the horizontal transfer mechanism (apart from vertical inheritance). The DNA thus transferred by lateral/horizontal method can be stably incorporated in the recipient […]
In Transduction, DNA is transferred from one cell to another through the agency of viruses. Genetic transfer of host gene by bacteriophage occurs in two ways-Generalized transduction and specialized transduction. Specialized transduction occurs only in […]
In Transduction, DNA is transferred from one cell to another through the agency of viruses. Genetic transfer of host gene by bacteriophage occurs in two ways-generalized transduction and specialized transduction. In generalized transduction, virtually any […]
Thiosulfate citrate bile salts sucrose (TCBS) agar is a selective as well as differential culture medium used for selective isolation of Vibrio spp from a variety of clinical and nonclinical specimens. Vibrio cholerae is the […]
Microbiologists work in public health laboratories, hospital laboratories, reference or independent laboratories, and physician office laboratories. Microbiologist must be aware of what the physician needs and as well as what the laboratory needs. At an […]
Bacteria grow on solid media as colonies. A colony is defined as a visible mass of microorganisms all originating from a single mother cell. Key features of these bacterial colonies serve as important criteria for […]
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