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 |  Human Biology, 7/e Dr. Sylvia S. Mader
Sexually Transmitted Diseases
Chapter Outline
17.1 Viral Infectious DiseasesViruses are noncellular and they have to reproduce inside a living host. 340When viruses reproduce, copies of their genetic material are enclosed within protein coats. When an animal virus bursts from the cell, it receives an envelope. 340-41Viruses cause many human diseases, such as measles and mumps, which are not sexually transmitted. 341AIDS, genital warts, herpes, and hepatitis B are sexually transmitted diseases caused by viruses. 342-44 |
| | | 17.2 Bacterial Infectious DiseasesBacteria are functioning cells, but they lack the nucleus and membranous organelles found in human cells. 345Bacteria reproduce on their own by binary fission. 345-46Bacteria cause many human diseases, such as tuberculosis and tetanus, which are not sexually transmitted. 346Chlamydia, gonorrhea, and syphilis are sexually transmitted diseases caused by bacteria. 346-49 |
| | | 17.3 Other Infectious DiseasesProtozoa are unicellular but their single cell does have the organelles found in human cells. Yeasts are unicellular fungi but other fungi and animals are multicellular. 351Protozoa, fungi, and animals have an independent reproductive cycle. 351Malaria is a prime example of a protozoan disease which is not sexually transmitted. Trichomoniasis is sexually transmitted. 351A fungus is the cause of athlete's foot, an infection of the skin, and one form of vaginitis, an infection of the vagina. 351 Many different types of animals cause infections in humans. Pubic lice are sexually transmitted. 352 |
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2002 McGraw-Hill Higher Education