HIV/AIDS: Causes, Symptoms, Types & Tests

HIV (Human Immunodeficiency Virus) is a virus that causes infection of the immune system. If someone does not receive the proper medical treatment, HIV slowly makes a person's body more susceptible to other infections and can eventually cause AIDS (Acquired Immunodeficiency Syndrome), a late stage of the HIV infection. Molecular Diagnostics and Therapy offers diagnostic services that help identify disease accurately for the doctor and assist in the diagnosis of infections and other health problems. 

Knowing how to recognize symptoms of HIV, the causes of HIV, HIV testing, AIDS symptoms, and the diagnosis of HIV can lead to informed choices about getting the right medical care. Healthy living requires consistent HIV medical care, and with contemporary medical management, HIV can be effectively managed. Early diagnosis is crucial because, once it is known, further treatment and monitoring will start.

What Is HIV/AIDS?

HIV is a virus that attacks cells in the immune system, especially CD4 cells. HIV weakens the immune system over time, to the point where the body cannot handle infections or some diseases. The final stage of HIV infection is AIDS. AIDS will not develop in everyone who has HIV, especially if HIV is diagnosed and treated properly. HIV is NOT spread by using social contact like hugging, shaking hands, sharing meals, or being in the same room.

HIV Causes and Transmission

The primary HIV causes are related to contact with specific bodily fluids from a person with HIV. Under certain conditions, HIV can be passed on through blood, semen, vaginal fluids, and breast milk. The most frequent ways of becoming infected are through exposure to HIV from an infected person, sharing needles or other injection drug equipment, and mother-to-fetus infection during the time of pregnancy, delivery, or breastfeeding. 

HIV may also be passed on by transfusions of blood or other blood products if proper safety practices aren't practiced or by sharing injectable drugs, syringes, needles, and other similar instruments. This has been greatly minimized with modern screening and safety procedures that occur in a healthcare setting. HIV isn't passed on by sharing toilets, ordinary social interactions, sharing utensils, sharing cups, or mosquito bites.

HIV Symptoms

The symptoms caused by HIV can greatly differ from person to person and may also vary depending on the stage of HIV infection. A few weeks after infection, some develop all the symptoms of the flu. Some of these may include symptoms such as a fever, sore throat, swollen lymph nodes, tiredness, headache, or a skin rash. Early-stage symptoms can be unnoticeable for others. A person can experience only minimal or none of the symptoms despite the presence of the virus in the body during the chronic stage. Hence, HIV testing is valuable if exposure to the virus is suspected. If HIV is left untreated, it can make you vulnerable to other infections and diseases as well as weaken your immune system.

AIDS Symptoms

When HIV causes severe attacks on the immune system, AIDS symptoms begin. Symptoms might include frequent or repeated infections, loss of weight, high fever or night sweats, and constant diarrhea, fatigue, or other severe conditions. The above symptoms do not just occur in AIDS and may be associated with other medical problems. So don't assume that the presence of symptoms proves that an individual is infected with HIV or that the person has AIDS. Medical evaluation and testing are required.

Types and Stages of HIV Infection

The course of the infection, and the health of the immune system, has been divided into stages to describe HIV infection. The acute stage is the immediate onset of infection and can be accompanied by a high viral load in the blood. Others may end up having some flu-like symptoms during this time, or they may not have any symptoms at all.

The chronic stage can last for many years. With effective antiretroviral treatment, HIV can remain controlled during this phase indefinitely; without treatment, the chronic stage will generally progress toward AIDS over time. AIDS is the late-term stage of HIV infection and is connected with extreme damage to the immune system. HIV treatment does a lot to dampen the risk of the disease progressing to AIDS.

HIV Test and Diagnosis

The only sure way to diagnose whether someone has HIV is by getting an HIV test. The tests detect various markers of HIV infection, such as antibodies, antigens, or the virus itself. Antibody tests are used to detect antibodies generated by the body in response to HIV infection. There are antigen/antibody tests that identify a viral protein known as the p24 antigen as well as HIV antibodies. In some cases, especially if it is suspected that infection has been recent, nucleic acid tests (NATs) can be used to detect HIV genetic material in the blood. The time of testing is important because HIV may not be detectable by a test for some time after a person is infected. A health care provider can refer to a test that may be appropriate and can tell if it would be necessary to repeat a test.

Importance of HIV Diagnosis

If a person is diagnosed with HIV, he or she can receive proper medical treatment and surveillance. With proper treatment, HIV levels can be lowered and the immune system protected using modern treatments for HIV. With effective treatment, people living with HIV who achieve an undetectable viral load do not transmit HIV through sex–this is called U=U, or “Undetectable = Untransmittable.” Testing can also deepen people's understanding of their health and take actions to ensure their health and the health of others.

When Should You Consider HIV Testing?

HIV testing may be recommended following an exposure, post-exposure, or if advised by a health care provider. Some at-risk individuals should also have periodic tests. It is not possible to determine that someone has HIV just by how they feel, because HIV could be present for a great deal of time without any obvious symptoms. If you think you may have recently been exposed to HIV, see a healthcare provider as soon as possible (some preventive actions, such as post-exposure prophylaxis, are time-sensitive).

Conclusion

Appropriate diagnosis and treatment of HIV is a manageable viral illness. Knowing about the causes of HIV, the signs and symptoms of HIV, symptoms of AIDS, tests for HIV, and diagnosis of HIV can help individuals appreciate the need for a prompt medical evaluation. There is no way to determine HIV status based on how someone looks or feels; rather, if the person thinks he may have been exposed to the virus, then he or she should consult a qualified health care professional for appropriate testing. Molecular Diagnostics and Therapy promotes laboratory and diagnostic services for healthcare evaluation that are capable of contributing to infectious disease and/or other health condition detection and investigation.