A blood test for syphilis. Venereal Disease Research Laboratory is commonly abbreviated VDRL.
A negative (“nonreactive”) VDRL is compatible with a person not having syphilis. However, a person may a negative VDRL and still have syphilis since, in the early stages of the disease, the VDRL often gives negative results. This is called a false negative VDRL.
The VDRL test is sometimes positive in the absence of syphilis. For example, a false positive VDRL can be encountered in infectious mononucleosis, lupus, the antiphospholipid antibody syndrome, hepatitis A, leprosy, malaria and, occasionally, pregnancy.
The RPR (rapid plasma reagin) test is similar to the VDRL test. It is also designed to detect an antibody substance in the bloodstream when syphilis is present but, as with the VDRL, early syphilis infections may give a false negative RPR result. The RPR, like the VDRL, can also give false positive results.
- Venereal wart
A wart that is confined primarily to the moist skin of the genitals. These warts are due to viruses belonging to the family of human papilloma viruses (HPVs) which are transmitted through sexual contact. The virus can also be transmitted from mother to baby during childbirth. Most people infected with HPV have no symptoms but […]
The puncture of a vein with a needle to withdraw blood. Also called phlebotomy or, more often, a blood draw.
A poison, particularly one secreted by an animal. Examples are bee venom, snake venom, scorpion venom, and spider venom. Snake venom is also called venin.
- Venom, scorpion
The potent poison of the scorpion. A sting can be fatal to a person who is allergic to it. A scorpion is an insect that has an elongated body and a segmented, curved tail tipped with a venomous stinger. Grasping, fingerlike first appendages are other typical features. The toxicity of scorpion venom varies by species. […]
1. Full of venom. 2. Having venom, like some snakes and insects. 3. By extension, noxious, as a venomous tongue.