The hair perforation test, also known as an in vitro hair perforation test, is a laboratory test used to help distinguish the isolates of dermatophytes, such as Trichophyton mentagrophytes and its variants.[1] The test is performed by placing an organism into a Petri dish containing water, yeast extract, and hair. After incubation for 4 week, they are examined under microscopy T.mentagrophyte would have produced erosions on the Hair while T. Rubrum will not produce any change. Hence they are used to differtiate dermatophytes.
The Mayo Clinic's mycology laboratory has identified five common dermatophytes; Microsporum gypseum, Microsporum canis, Trichophyton rubrum, Trichophyton mentagrophytes, and Trichophyton tonsurans.
[2]
^"Hair Perforation Test for Dermatophytes". School of Molecular & Biomedical Science. The University of Adelaide. Archived from the original on 4 October 2009. Retrieved 2 January 2010.
^Caddell, Jeremy R (2002). "Differentiating the dermatophytes". Clinical Practice: Microbiology. 15 (1). Clinical Laboratory Science: 15(1):13. PMID 12778950. Retrieved 2 January 2010.
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confirming the identity of the isolate as M. canis. The In vitro hairperforationtest, commonly used to differentiate many dermatophytes, is not particularly...
Negative test results occur for the urease test, hairperforationtest, and casamino acids erythritol albumin agar. In conjunction to physiological tests, contact...
scalp is not present, overall hair density is normal, and a hair pull test is negative (the hair does not pull out easily). Hair is often pulled out leaving...
In living individuals, the test is covered by a skin of velvet-textured spines which are covered with very small hairs (cilia). Coordinated movements...
diagnosis. However, their absence does not preclude it. In severe cases with perforation, an adjacent phlegmon or abscess can be seen. Dense fluid layering in...
gum, but rather the perforation edges. The edges will be somewhat hairy on an original gummed stamp, but on a regummed stamp the hairs will be glued together...
biliary surgery, liver biopsy, abdominal trauma, and, rarely, spontaneous perforation. Cancer of the gallbladder is uncommon and mostly occurs in later life...
two counter-rotating drums, the first of its type. Each drum had 5,000 perforations to help evacuate water. Dyson's next washing machine, in 2004, was the...
Control have experienced and/or reported adverse effects, including: perforation of the uterus and/or fallopian tubes, identification of inserts in the...
rhinitis is typically triggered by environmental allergens such as pollen, pet hair, dust, or mold. Inherited genetics and environmental exposures contribute...
cholangitis. Taenia saginata has been reported as a cause of gallbladder perforation if left untreated in some cases. Taenia saginata adult worms can live...
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characteristics including gastric giant and multiple ulcers, stenosis, perforation, and fistula. For example, gastric ulcers combined with entogastric fungal...
rear, midway up the hock with the canine teeth. These leave gaping skin perforations over 4 cm (1+1⁄2 in) in diameter. Although blood loss, muscle damage...
blood clots in the lungs, and bleeding in the respiratory tract, GI perforation, bleeding in the stomach and intestines, pancreatitis, hemorrhoids, anal...
bloody cough, lung infiltrates GI tract: abdominal pain, bloody stool, perforations (hole in the GI tract) Kidneys: inflammation of the kidney's filtration...
neovascularization, corneal scarring, corneal thinning, and even corneal perforation. Another contributing factor may be lacritin monomer deficiency. Lacritin...
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