IB Biology Topic C3.2.11 Transmission of HIV in Body Fluids Revision Notes (SL/HL)

IB Biology Topic C3.2.11 Transmission of HIV in Body Fluids Revision Notes (SL/HL) | RevisionDojo

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HIV Spreads Only Through Certain Body Fluids

Definition

HIV

A virus that attacks the immune system, leading to the eventual development of AIDS if untreated.

HIV is the Human Immunodeficiency Virus, and it can only pass from person to person through a few specific body fluids.
The fluids that can carry enough virus to infect someone are blood, semen, vaginal fluids, rectal secretions, and breast milk.
For infection to happen, one of these fluids must reach a mucous membrane, enter through damaged tissue, or be injected straight into the bloodstream.

Note

Once HIV gets inside, it attacks the immune system, which is covered in C3.2.12.
This article is only about how the virus gets from one person to another.

Four Main Routes Move HIV Between People

Unprotected sex is the most common way HIV spreads.
1. Tiny tears in the mucous membranes of the genitals or rectum let virus in infected fluid reach the bloodstream.
2. Anal sex carries the highest risk because the rectal lining is thin and tears easily.
Sharing needles or syringes passes infected blood directly from one person to another.

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Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

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Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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HIV Spreads Only Through Certain Body Fluids

Definition

HIV

A virus that attacks the immune system, leading to the eventual development of AIDS if untreated.

HIV is the Human Immunodeficiency Virus, and it can only pass from person to person through a few specific body fluids.
The fluids that can carry enough virus to infect someone are blood, semen, vaginal fluids, rectal secretions, and breast milk.
For infection to happen, one of these fluids must reach a mucous membrane, enter through damaged tissue, or be injected straight into the bloodstream.

Note

Once HIV gets inside, it attacks the immune system, which is covered in C3.2.12.
This article is only about how the virus gets from one person to another.

Four Main Routes Move HIV Between People

Unprotected sex is the most common way HIV spreads.
1. Tiny tears in the mucous membranes of the genitals or rectum let virus in infected fluid reach the bloodstream.
2. Anal sex carries the highest risk because the rectal lining is thin and tears easily.
Sharing needles or syringes passes infected blood directly from one person to another.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic C3.2.11: Transmission of HIV in Body Fluids Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

HIV Spreads Only Through Certain Body Fluids

Four Main Routes Move HIV Between People

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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HIV Spreads Only Through Certain Body Fluids

Four Main Routes Move HIV Between People

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account