Theory:

Sexually transmitted diseases can be caused by pathogen such as virus, bacteria or parasites.  These diseases are transmitted through sexual contact from one person to another person. Sometimes sexually transmitted infections can be transmitted through a non sexually way too.
Non sexual ways of transmission includes:
  • From mother to child during  pregnancy or breastfeeding
  • Through blood transfusions
  • Shared needles
Important!
1. Sexually transmitted diseases (STD) cannot be transmitted through physical contact.
2. STD is also called sexually transmitted infection (STI) or venereal disease (VD).
In this subtopic, we will learn about the following diseases in detail
  • Gonorrhoea
  • Syphilis
  • Genital herpes
  • Genital warts 
  • AIDS
Sexually transmitted diseases by bacteria:
Disease: Gonorrhoea
 
Causative organism: Gonorrhoea Neisseria
  
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Gonorrhoea Neisseria
  
Mode of transmission: Sexual contact

Tissue/Organ affected: Urethra is affected
 
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Gonorrhoea infection

Symptoms:  Discharge from genital openings, pain during urination.
 
Treatment: Gonorrhoea infection can be treated and cured with antibiotics such as ceftriaxone which is given in the form of an injection, and azithromycin via oral.
 
Disease: Syphilis
  
Causative organism: Treponema pallidum

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Treponema pallidum
 
Mode of transmission: Sexual contact

Tissue/Organ affected: Minute abrasion on the skin or mucosa of the genital area.
 
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Different stages of Syphilis

Symptoms:
  • Ulceration on genitals
  • Skin eruption
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Treatment and prevention of syphilis
 
Treatment: Syphilis can be treated and cured with antibiotics such as penicillin, doxycycline, azithromycin and ceftriaxone.