Lab Test


A laboratory (informally, lab) is a facility that provides controlled conditions in which scientific research, experiments, and measurement may be performed. The title of laboratory is also used for certain other facilities where the processes or equipment used are similar to those in scientific laboratories. These notably include:

Fungus (KOH) test for hair, skin or nails.

Skin Biopsy: A piece of skin deceased part is taken out under local anesthesia and send it to the histo pathologist for further confirmation.

Smear for gonococci: a gram-negative intracellular diplococcus of the species Neisseria gonorrhoeae, the cause of gonorrhea; a nonmotile aerobic microorganism of the species N. gonorrhoeae. It is a parasite of the mucous membrane.

AFB Smear: Acid-fastness is a physical property of some bacteria referring to their resistance to decolorization by acids during staining procedures.

Acid-fast organisms are difficult to characterize using standard microbiological techniques (e.g. Gram stain – if you gram stained an AFB the result would be an abnormal gram positive organism, which would indicate further testing), though they can be stained using concentrated dyes, particularly when the staining process is combined with heat. Once stained, these organisms resist the dilute acid and/or ethanol-based de-colorization procedures common in many staining protocols—hence the name acid-fast.

Fungus Tzank test: In dermatopathology, the Tzanck test, also Tzanck smear, is scraping of an ulcer base to look for Tzanck cells. It is sometimes also called the Chickenpox skin test and the herpes skin test.

Tzanck cells (multinucleated giant cells) are found in:

* Herpes simplex
* Varicella and herpes zoster
* Pemphigus vulgaris
* Cytomegalovirus

RPR Test: Rapid Plasma Reagin (RPR) refers to a type of test that looks for non-specific antibodies in the blood of the patient that may indicate that the organism (Treponema pallidum) that causes syphilis is present. The term "reagin" means that this test does not look for antibodies against the actual bacterium, but rather for antibodies against substances released by cells when they are damaged by T. pallidum.

In addition to screening for syphilis, an RPR level (also called a "titer") can be used to track the progress of the disease over time and its response to therapy.

Wood's Lamp Test: This is a ultra violate lamp test used for Vitiligo and fungus also to find other deseases

Fungal and bacterial infections, It is also helpful in diagnosing:

*fungal infections (Microsporum audouini). Some forms of tinea, such as Trichophyton tonsurans, do not fluoresce.
*bacterial infections (Corynebacteriium minutissimum, Pseudomonas)
*Propionibacterium acnes, the bacteria responsible for acne, exhibits an orange glow under a Wood's lamp.
(Reference: Wikipedia.org)