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Question

An STD showing early symptom of characteristic chancre (a skin sore) on the genitals is caused by the infection of

A
Treponema pallidum
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B
Neisseria gonorrhoeae
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C
Human immunodeficiency virus
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D
E.coli
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Solution

The correct option is A Treponema pallidum

Syphilis is a bacterial disease caused by Treponema pallidum which usually spreads by making sexual contact with the infected person. It starts with a painless sore –typically on the genitals, mouth or rectum. The disease spreads to people when they come in contact with an infected person’s syphilitic sores.
Neisseria gonorrhoeae is a bacterium that causes a disease called gonorrhoea in humans. Its symptoms include increased frequency of urination which is painful, a pus-like discharge from the tip of the penis, testicular swelling, vaginal bleeding between periods in females and consistent soreness of the throat. Many are asymptomatic, however, if left untreated with antibiotics it invariably leads to infertility in both males and females. Acquired immunodeficiency syndrome (AIDS) is a syndrome caused by the HIV virus that interferes with the body's ability to fight infections by making the individual immunodeficient.
E.coli is a common bacterium occuring in the intestines of animals and humans. Most E.coli are harmless but some strains can cause diarrhoea, UTI, etc.


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