Micro Lesson 7 - Bacteria in the Dental Environment DEA...

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Bacteria in the Dental Environment DEA 1135 Introduction to Microbiology Bacterial Infections I. SYPHILIS II. GONORRHEA III. TUBERCULOSIS IV. ACTINOMYCOSIS V. TETANUS I. Syphilis Syphilis is a complex sexually transmitted disease (STD) caused by the bacteria Treponema pallidum . If detected and treated, syphilis can be cured with _____________. If untreated, syphilis may linger and progress in a stepwise fashion to later stages. The most common way syphilis bacteria enter the body is through ______ _________. Once infected, a person can pass the disease to others (is contagious) whenever a sore or a rash is present. Symptoms of syphilis may be unnoticed or may mimic many other diseases. This may cause an infected person to delay seeking medical care or may make diagnosis difficult. Different stages of syphilis have different symptoms. The 4 distinct stages of syphilis are referred to as primary, secondary, latent (hidden), and tertiary (late). Sores mainly occur on the external genitals, vagina, anus, or rectum. Sores can also occur on the _____ and in or around the ___________. The bacteria most commonly enter the body through mucous membranes, usually in the area around the genitals and urinary system. Other, rare ways syphilis can enter the body include through openings in the skin, such as cuts and scrapes or even through wet kisses, if the infected person has a sore on the mouth or lips. 1
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Syphilis may also be transmitted by using a needle previously used by an infected person. Syphilis can be transmitted through a blood transfusion, but this is very rare. Transmission depends on _______ contact with active lesions. T. pallidum enters the body through abrasions and penetrates mucous membranes, migrating to the lymphatic system. The organism incubates for 10-90 days after which a ________ develops at the site of inoculation. Syphilis (Primary stage) •The first symptom of syphilis is a sore called a chancre (pronounced shanker) that is usually painless. The sore begins at the site of infection as a small, solid, raised skin sore less than1 cm (0.39 in.) across. It develops into a red, usually ___________ open sore with a scooped-out appearance. The sore usually does not bleed. Two or more chancres may develop at the same time, usually in the __________ area, but sometimes on the hands, mouth, or other body surfaces. Chancres contain ____________ of syphilis bacteria and are highly contagious. This primary lesion heals typically within 3 to 6 weeks. The patient may feel that the infection is over but about 6-8 weeks after the appearance of the chancre, the secondary stage begins. Syphilis (secondary stage) During this stage, there are cutaneous and mucous membrane lesions that contain the T. pallidum organism that appear on the lips, throat, penis, vagina and other _______ surfaces. Mucous patch
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This note was uploaded on 08/19/2011 for the course DEA 1135 taught by Professor Guilford during the Spring '05 term at Gulf Coast Community College.

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Micro Lesson 7 - Bacteria in the Dental Environment DEA...

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