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In both sexes, disseminated gonococcal infection (DGI) can occur, leading to multiple distant sites of infection which can include the brain, heart and joints. Diagnosis of gonorrhea Doctors or other health care workers usually use three laboratory techniques to diagnose gonorrhea: staining samples directly for the bacterium, detection of bacterial genes or DNA in urine, and growing the bacteria in laboratory cultures. Many doctors prefer to use more than one test to increase the chance of an accurate diagnosis. The staining test involves placing a smear of the discharge from the penis or the cervix on a slide and staining the smear with a dye. Then the doctor uses a microscope to look for bacteria on the slide. You usually can get the test results while in the office or clinic. This test is quite accurate for men but is not good in women. Only one in two women with gonorrhea have a positive stain. It turns out that legume plants guide the evolution of rhizobia towards greater mutualism by reducing the oxygen supply to nodules that fix less nitrogen, thereby reducing the frequency of cheaters in the next generation. Frankia and Azospirillum, are genera of similar bacteria that do not live on legumes. Agrobacterium is a genus of bacteria that cause tumors in plants. Agrobacterium tumefaciens is the most commonly studied species in this genus. Agrobacterium is well known for its ability to transfer DNA between itself and plants, for this reason it has become an improtant tool for plant improvement by genetic engineering. Taxonomic note: The Agrobacterium genus is quite heterogeneous, recent taxonomic studies have reclassified all of the Agrobacterium species in to new genera, such as Ruegeria, Pseudorhodobacter and Stappia. But most species have been reclassified as Rhizobium species. Click on following items to see more information: Achromobacter, Antibacterial, Antibiotic, Antibiotic treatment, Antibacterial, Bacilli, Bacterium, Bacterium, Antibacterial, Phages, Biodegradation, Campylobacter, Cell culture, Cholera, Corynebacteria, E. coli, E. coli, E. coli, E. coli, E. coli, E. coli, Erythromycin, Flavobacteria, Yeast, Growth medium, Klebsiella, Meningococci, Bacterial, Micrococcus, Multidrug resistance, Pasteurella, Prokaryote, P. aeruginosa, Saccharomyces cerevisiae, Saccharomyces cerevisiae, Salmonella, Salmonella, Staphylococci, S. aureus, Streptococcus, Streptococcus, Vibrio The first indications of problems with the influenza vaccine produced by Chiron Corporation in 2004 involved S. marcescens contamination. Shigella are Gram-negative, nonmotile, nonsporeforming rod-shaped bacteria. They are pathogens of humans and other primates, causing shigellosis. Depending on age and condition of the host, as few as 10 cells depending on age and condition of host can be enough to cause an infection. The disease is caused when virulent Shigella organisms attach to, and penetrate, epithelial cells of the intestinal mucosa. After invasion, they multiply intracellularly, and spread to contiguous epitheleal cells resulting in tissue destruction. Some strains produce enterotoxin and Shiga toxin (very much like the verotoxin of E. coli O157:H7). Ciliates are covered in part or entirely with what look like little bristles called cilia (the Latin word for eyelash.) The cilia are used for locomotion, and to snag bacteria, algae and other food and direct it into the ciliate’s mouth-like opening. Ciliates include both grazers that dine on algae and bacterial cells and predators that attack and gulp down other protozoa. Grazers include Paramecium and Vorticella. An example of a predatory ciliate is Didinium. Ciliates are among the most complex of all single-celled creatures, with a diverse array of structures and organelles that perform a range of activities, from finding and catching food, digesting it, excreting it, moving about, respiring, sensing environmental conditions, and balancing the fluids inside their cells.
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