Sexually Transmitted Infections (STIs) – JSS1 Basic Science Lesson Note (Second Term)

Sexually transmitted infections (STIs) are infections that spread from one person to another through sexual intercourse with an infected person. Examples include gonorrhoea, chlamydia and syphilis, which are caused by bacteria. They can damage the reproductive organs and harm babies born to infected mothers. Abstinence, early treatment and avoiding multiple sexual partners help to prevent them.

Behavioural objectives

By the end of the lesson, students should be able to:

• give the full meaning of STIs;
• name three examples of STIs and their causative agents;
• state the symptoms and ways of spreading gonorrhoea, chlamydia and syphilis;
• list the effects of STIs;
• state ways of preventing STIs.

What are sexually transmitted infections?

Sexually transmitted infections (also called sexually transmitted diseases) are infections that can be spread from one person to another through sexual intercourse with an infected person.

What are examples, causative agents and symptoms of STIs?

What are the effects of STIs?

• They can damage the reproductive organs.
• They can break down the immune system.
• They can be associated with cancer of the reproductive organs.
• Premature labour or stillbirth (gonorrhoea).
• Blindness and birth defects in new babies (syphilis and gonorrhoea).

How can STIs be prevented?

• Public enlightenment
• Abstinence
• Early treatment in identified cases
• Strengthening the immune system
• Avoiding multiple sexual partners

Evaluation

• Give the full meaning of STIs.
• Mention three STIs that you know.
• State three methods of preventing STIs.

Assignment

1. Write down two effects of STIs on babies.
2. Name the causative agent of syphilis.