Mode of transmission of HIV

HIV can only be transmitted from an infected person to another through
direct contact of body fluids such as ;
·        
Blood
(including menstrual blood).
·        
Semen/Cum/precum/ejaculate.
·        
Vaginal
secretions.
·        
Breast
milk.

The World Health Organisation (WHO) Identify three main routes of HIV
transmission among the general population.
The first one is though unprotected sexual intercourse may result in the
transmission and constitute the single most important HIV transmission route. Given
the predominate role that heterosexual transmission plays in the HIV epidemic
in Africa. It is not surprising that this epidemic (Panda, 1988). Larso (1989)
has also described the role that organization of the commercial sex industry
and the availability of causal sex partner can play in the spread of HIV in the
Country.
Exposure to blood mainly through transfusion and needle sharing is the
second most common route of transmission. HIV sero-prevalence data from blood
many countries, especially in Nigeria, represent readily accessible sample for
in monitoring changes in HIV infection among population samples in several
areas raises question regarding the representativeness of the blood donor
sample (Torry & Way,1990). Donor tend to be predominantly Urban male and in
their young adult ages. In addition, female donor appears to be higher risk
group than the general population or male donors. Although blood to blood
record to that doesn’t show this group represents a valid proxy for the general
population(LUTH Unpublished).
The prenatal or substantial vertical (mother to child) transmission
constitutes the third main or major routes of HIV transmission. As of 1992,WHO
estimated that along 6.5million adults infections,750000 HIV  infected infants had been born in Africa (WHO,1992).Pregnant
women do transmit the virus(HIV) to there babies during pregnancy or birth and
also through breast milk .Nevertheless ,in Nigeria, data on pregnant women
provide the most representatives picture of HIV infection in the general
population(LUTH Unpublished).
Early case histories were separated out into risk group base on the
social behaviors and medical needs. therefore, we can classify the following
sub group demonstrated to be at risk for HIV infection .They are homosexuals
and bisexual, multiple heterosexual contact, intravenous drugs users, blood
product transfusion recipients and children those parents are at risk.
According to Center for Disease Control and Prevention(CDC 2001). The
most common ways teenagers get HIV/AIDS is having unprotected causal sex with
infected person. Some teenagers becomes infected from sharing needles and
syringes with someone who have HIV, also through blood transfusion but this is
now rare due to proper screening of blood.
The above sources has also revealed that nearly half of all HIV positive
teenager female are infected through sex with men  This source of transmission among the
teenagers is very high because teenagers use sexual behaviour to meet need of
friendship, intimacy and peer approval.
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