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The micro-organism tests: Indole-negative and nitrate reductase-positive (no gas bubbles produced) Methyl red-positive and Voges-Proskauer negative (Can be both MR- and V-P-positive) Catalase positive and cytochrome oxidase-negative; Phenylalanine deaminase-positive; Tryptophan test-negative; Urea test- positive; Casein test-negative; Starch ...
Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. [1] Their defining characteristic is that their cell envelope consists of a thin peptidoglycan cell wall sandwiched between an inner ( cytoplasmic ) membrane and an outer ...
Morganella morganii is a species of Gram-negative bacteria. [2] It has a commensal relationship within the intestinal tracts of humans, mammals, and reptiles as normal flora. [ 2 ] Although M. morganii has a wide distribution, it is considered an uncommon cause of community-acquired infection, and it is most often encountered in postoperative ...
Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria and gram-negative bacteria. It may also be used to diagnose a fungal infection. [1] The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique in 1884. [2]
The citric acid cycle is incomplete and lacks several enzymes that are found in a fully functioning cycle. The enzymes missing from the TCA cycle are citrate synthase, aconitate hydratase, and isocitrate dehydrogenase. [26] H. influenzae has been found in both aerobic and anaerobic environments, as well as environments with different pH's. [27]
While cramps are a common period-related pain, “it is not uncommon for people to have cramps outside of their menstrual cycle,” explains Kiarra King, M.D., F.A.C.O.G., board-certified ...
When some otherwise non-hemolytic bacteria, such as strains of the cholera-causing bacteria Vibrio cholerae, are plated on blood agar, no clearings are observed surrounding isolated colonies, but the blood surrounding larger areas of growth turns green. This process, called hemodigestion, is caused by the metabolic by-products of the bacteria ...
When should you worry about blood clots during your period? Menstrual bleeding that lasts more than seven days, known as menorrhagia , can be a signal of a larger health issue.