In the temperate climate zones many familiar viral and bacterial diseases are spread directly from person to person by airborne routes of transmission or by sexual contact in the tropics respiratory diseases such as measles respiratory syncytial virus tuberculosis and sexually transmitted diseases are also of great importance. Health communication and social marketing campaigns for sexually transmitted disease prevention and control what is the evidence of their effectiveness topical imiquimod 5 cream as an effective treatment for external genital and perianal warts in different patient populations. The tropical ecosystem as related to sexually transmitted diseases and their epidemiology is outlined in this article the predominance of first generation bacterial stds with more florid presentations together with a background of more covert infections such as with chlamydia and human papillomavirus are noted presentations of infections in people returning from the tropics are . Sexually transmitted diseases stds are the infections and resulting clinical syndromes caused by approximately 30 infectious organisms transmission sexual activity is the predominant mode of transmission through genital anal or oral mucosal contact epidemiology. As is the case for most other infectious diseases sexually transmitted diseases std are common in many parts of the developing world this may have multiple causes such as a larger pool of
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