HIV and AIDS Chapter 25-Lesson 3 & 4

What is HIV/AIDS?? HIV causes AIDS HIV or the human immunodeficiency virus is a virus that attacks the immune system AIDS or the acquired immune deficiency syndrome is a disease in which the immune system of the patient is weakened AIDS is the advanced stage of HIV

How HIV attacks cells HIV attaches to cell surface Virus core enters cell and goes to nucleus Virus makes a copy of its genetic material New virus assembles at cell surface New virus breaks away from host cell

How HIV is transmitted Does not survive well on surfaces such as toilets or telephones!! You are not at risk of contracting HIV if you are in the same classroom or work with someone who has HIV It cannot be transmitted by touching!

How HIV is transmitted Sexual intercourse Can be transmitted through any form of sexual intercourse During intercourse, secretions containing HIV can enter a partner’s bloodstream through tiny cuts in the body The number of sexual partners a person has and having STDs that cause sores increases the risk of HIV

How HIV is transmitted Sharing needles Used to inject drugs The needle or syringe can become infected with HIV Anyone who uses that same needle can inject HIV directly into his or her bloodstream

How HIV is transmitted Mother to baby A pregnant female who is infected with HIV can pass the virus to her baby HIV can be transmitted through the umbilical cord and during delivery Breast milk can also transfer the virus to a newborn