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What Is Hiv Transmitted Through

What Is Hiv And What Is Aids

What is HIV? | How is HIV Transmitted?

HIV/AIDS are widely known as incurable sexually transmitted diseases, but you might not know the difference between these acronyms and what they stand for.

For simplicityâs sake, HIV is the virus that causes AIDS. HIV stands for the Human Immunodeficiency Virus.

If a person takes a blood test and receives a diagnosis of HIV, then they are HIV positiveâif a person does not have HIV, then they are HIV negative. HIV causes havoc in a personâs body by weakening their immune system . HIV progressively destroys the cellular part of the immune systemâparticularly types of white blood cells called CD4 cellsâwhich, over time, makes the person become immunodeficient .

As the HIV infection develops in the body, the person will become more and more immunodeficient until they reach a point where they are classified as having Acquired Immunodeficiency Syndrome . This is often the end stage of an HIV infection, where a personâs body is so immunodeficient that they develop infections, diseases, or cancers and are no longer able to mount a immune defense and fight them off .

There is no cure for HIV . But, if a person does become infected with HIV there are treatments available which can help keep a person healthy.

How Is Hiv Transmitted

HIV is transmitted between humans through the exchange of certain types of bodily fluids. Bodily fluids that can transmit HIV include blood, semen, breast milk, and vaginal fluids .

Not all body fluids can transmit HIV. The following cannot transmit HIV:

  • Exchanging saliva, like through closed-mouth kissing or sharing drinks/utensils
  • Coming in contact with an HIV positive personâs tears, sneezes, or sweat
  • Ordinary physical contact, such as hugging, hand shaking, or touching shared objects like cutlery, cups, or toilet seats .
  • Air or water
  • Pets and insects cannot carry the virus and infect you, because transmission of HIV is only between humans .

While care needs to be taken in some situationsâlike when having sex or when open injuries are presentâthis certainly does not mean that it is unsafe to be around people with HIV. Think of how you interact with the vast majority of peopleâbodily fluids are not exchanged. Harboring discriminatory thoughts only perpetuates a fearful stigma against someone with HIV, which only hurts the person who has it.

HIV is often transmitted through sexual activity and drug use in adults in the United States . Maternal transmissionâfrom mother to childâis how the infection is spread to infants .

What Are The Most Common Hiv Symptoms

Not everyone who is positive will even experience HIV symptoms, according to Rymland. “A lack of symptoms doesn’t mean you don’t have HIV,” however, she says. Getting tested for HIV regularly if you’re at risk for the virus is important because if left undiagnosed “you can still transmit the virus, and may eventually develop symptoms,” she explains.

Some newly infected individuals will experience flu-like symptoms , she says. Generally, these symptoms take hold within three weeks of transmission, she says. “But after these initial symptoms go away, an HIV-positive person may experience no symptoms for years and years,” she says. “And again, not everyone will have symptoms at all.”

If HIV progresses to AIDs, you may experience more noticeable symptoms such as rapid weight loss, recurring fever, extreme fatigue, prolonged swelling of the lymph nodes, diarrhea that lasts more than a week, sores on the mouth, anus, or genitals, and red, brown, pink, or purple blotches on or under the skin or inside the mouth, nose, or eyelids, according to the U.S. Department of Health & Human Services. It could also mean experiencing various types of illnesses such as pneumonia, brain infection, and cancer of the lymph nodes, says Dr. Pearlman.

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Hiv Is An Infection That Can Lead To Aids

HIV stands for Human Immunodeficiency Virus. Its a virus that breaks down certain cells in your immune system . When HIV damages your immune system, its easier to get really sick and even die from infections that your body could normally fight off.

About 1.1 million people in the U.S. are living with HIV, and more than 38,000 new infections happen every year. Most people with HIV dont have any symptoms for many years and feel totally fine, so they might not even know they have it.

Once you have HIV, the virus stays in your body for life. Theres no cure for HIV, but medicines can help you stay healthy. HIV medicine lowers or even stops your chances of spreading the virus to other people. Studies show that using HIV treatment as directed can lower the amount of HIV in your blood so much that it might not even show up on a test when this happens, you cant transmit HIV through sex.Treatment is really important . Without treatment, HIV can lead to AIDS. But with medicine, people with HIV can live long, healthy lives and stop the spread of HIV to others.

Viral Load & Medications

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If someone has HIV, this does not mean that they are restricted to celibacy. Many people with HIV still continue to have safe, enjoyable sex lives without spreading the virus. Always using a condom or barrier method is an important first step to prevent the sharing of HIV containing fluids.

Antiretroviral therapy : Another way to help decrease the risk of spreading HIV is to lower a personâs viral loadâthe amount of HIV in a personâs blood. Viral loads can be lowered using medications called antiretroviral therapy . These medications can lower the HIV viral load so much that HIV may not even be detectable on a blood testâthis is called an undetectable viral load . When a person’s viral load in undetectable, they have effectively no risk of transmitting the HIV virus to a non-infected partner . Taking these medication will help keep a person with HIV healthy while also helping prevent the spread of HIV to another person. This is not a cure, however. If medication is taken incorrectly or stopped, HIV viral loads will increase again and transmission can occur. Condoms and other barrier methods should still always be used during sex .

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How Is Hiv Recognized

Doctors use laboratory tests to confirm HIV infection. The Elisa and Western Blot analyses identify people who have been exposed to HIV. These tests determine if the blood contains particular antibodies that result from contact with the virus. They do not identify who among a group of infected individuals will develop the disease. The presence of antibodies or HIV markers means the person has been infected with HIV but no one can predict when and if they will get AIDS related symptoms.

Doctors diagnose AIDS by blood tests and the presence of specific illnesses such as pneumocystis carinii pneumonia or Kaposi’s sarcoma. These diseases overcome the weakened immune system and are responsible for the high death rate among AIDS patients.

Hiv Transmission Risk Factors And Prevention

Joseph Bennington-CastroLaura Martin, MDYaroslav Danylchenko/Stocksy Everyday Health

When the human immunodeficiency virus causes infection, it attacks certain immune system cells called T helper cells, or CD4 cells. The virus replicates itself and, over time, damages its host cells, impairing the body’s ability to fight off infections and making it susceptible to other diseases. Acquired immunodeficiency syndrome, or AIDS, is the final stage of an infection with HIV.

Anyone can get HIV, but certain populations are at greater risk. There are, however, a number of ways to reduce your risk, and certain medicines and precautions can prevent the spread of the virus.

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How Can I Protect Myself

The best way to protect yourself from HIV is to not have sex and not share needles.

If you decide to have sex, reduce your risk of getting HIV by:

Understanding how HIV spreads can help you make safer choices about sex. Talk to your doctor if you have any questions about HIV and if you want to get tested.

Factors That Increase The Risk Of Sexual Transmission

Is it possible to transmit HIV through saliva?

Not every act of unprotected sex with an HIV-positive person results in HIV transmission. But other factors can make HIV transmission more likely.

If the HIV-negative person has an untreated sexually transmitted infection , the risk is greater.

Just as HIV treatment and an undetectable viral load prevents HIV transmission, a high viral load makes it more likely. Viral load refers to the quantity of HIV in a persons body fluids. It is extremely high in the first few weeks after a person is first infected with HIV. It may also be high if a person does not take HIV treatment and has advanced disease. People who have HIV without realising it cannot take HIV treatment, so there is a strong possibility that they have a high viral load.

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Blood Transfusions And Organ Donation

The risk of contracting HIV from a blood transfusion, other blood products, or organ donation is now extremely rare in the United States. All donated blood or blood products in the United States are for several types of bloodborne pathogens, including HIV.

Organ donations are also screened for HIV. Although very rare, its possible for HIV transmission to occur following an organ transplant.

However, testing of organ recipients after surgery can quickly detect transmission so that antiretroviral medications can be started promptly.

How Hiv Infects The Body

HIV infects the immune system, causing progressive damage and eventually making it unable to fight off infections.

The virus attaches itself to immune system cells called CD4 lymphocyte cells, which protect the body against various bacteria, viruses and other germs.

Once attached, it enters the CD4 cells and uses it to make thousands of copies of itself. These copies then leave the CD4 cells, killing them in the process.

This process continues until eventually the number of CD4 cells, also called your CD4 count, drops so low that your immune system stops working.

This process may take up to 10 years, during which time you’ll feel and appear well.

Page last reviewed: 22 April 2021 Next review due: 22 April 2024

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How Long Does It Take To Develop The Disease

There is no fixed period between the first contact with HIV and the development of the disease. Signs and symptoms resulting from infection with HIV develop in stages. Many infected individuals may have no symptoms for several years. But others may develop symptoms within three years from the time of infection.

Symptoms of HIV infection are fever, swollen lymph glands in the neck and armpits, sweating, aches, fatigue, unexplained weight loss and diarrhea.

Within eight years, about 50 percent of all infected people develop specific conditions categorized as AIDS. These conditions include a lung disease called “pneumocystis carinii pneumonia,” skin tumours called “Kaposi’s sarcoma,” fungal and viral infections such as candidiasis and herpes zoster, and severe diarrhea.

Some AIDS patients also suffer from dementia resulting in problems with memory and thinking. AIDS patients are prone to various infections of the brain, just as they suffer from an unusually high number of cancers, bacterial and viral infections of other parts of the body.

Lowering The Risk Of Sexual Transmission

HIV Resources &  FAQ

There are several protective measures which dramatically reduce the risk of HIV transmission during sex. You can find out more about these on other pages.

Undetectable viral load: when people with HIV take effective treatment, the amount of HIV in their body fluids falls drastically, to the point where they cannot pass HIV on to their sexual partners. An extremely low level of HIV in body fluids is referred to as an undetectable viral load. The knowledge that this prevents transmission is often referred to ‘Undetectable equals Untransmittable’ .

PrEP: if the HIV-negative person takes antiretroviral medications as pre-exposure prophylaxis , this significantly reduces the risk of acquiring HIV. The most common form of PrEP is in a tablet, but it can also be provided as a vaginal ring or an injection.

Condoms: if male condoms or female condoms are used, this significantly reduces the risk of acquiring HIV.

Male circumcision: if you are circumcised, this partially lowers your risk of acquiring HIV during vaginal sex.

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Tattoos And Body Piercings

  • There are no known cases in the United States of anyone getting HIV this way.
  • However, it is possible to get HIV from tattooing or body piercing if the equipment used for these procedures has someone elses blood in it or if the ink is shared. This is more likely to happen when the person doing the procedure is unlicensed because of the potential for unsanitary practices such as sharing needles or ink.
  • If you get a tattoo or a body piercing, be sure that the person doing the procedure is properly licensed and that they use only new or sterilized needles, ink, and other supplies.

How Does Hiv Affect The Body

The human immune system involves many types of cells which guard against germs responsible for most diseases. The immune system’s most important guard cells are B-cells and T-cells, which are special white blood cells. B-cells and T-cells cooperate to fight any germ that attacks the human body.

B-cells produce particular proteins, called antibodies, that try to neutralize the invading germ. After a person recovers from an infection, these antibodies continue to circulate in the bloodstream, acting as part of the immune system’s “memory.” Immune system memory explains why a person rarely suffers a second attack from an infectious disease such as measles. If the same germ is encountered again, the antibodies will recognize and neutralize it. T-cells attack the germ directly and try to kill it.

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What Is The Future For Hiv

Trends continue toward simplifying drug regimens to improve adherence and decrease side effects. In addition, the availability of multiple new drugs in new classes has made it possible to suppress viral load to undetectable levels even in many of the most treatment-experienced patients. Moreover, many are virologically suppressed taking a single well-tolerated pill per day. Another major advance could emerge with the availability of every one to two month injections of long-acting therapies.

The report of the so-called “Berlin patient” has stimulated a great deal of interest in cure research. This HIV-infected man had leukemia, which was treated with a bone marrow transplant. His health care providers were able to identify a tissue-matched donor who happened to be one of the rare individuals who carried a genetic defect resulting in the lack of CCR5 on the surface of their cells. CCR5 is required for certain types of HIV to enter the cells, and these unique individuals are relatively resistant to infection. After the bone marrow transplant, the patient was able to stop antiretroviral therapy and for years has not had detectable HIV in his body. It is worth noting that this individual experienced far more than the engraftment of unique bone marrow. He underwent intensive chemotherapy and radiation treatment to destroy most immune cells in the body, as well as graft-versus-host disease, which could have also further destroyed residual HIV-infected cells.

How Long Can Hiv Survive Outside The Body

How is HIV Transmitted? Episode 2

Once outside the body, HIV usually cant survive for very long. Coming into contact with blood or semen that has been outside the body doesnt generally pose a risk for HIV transmission.

Similarly, the risk of passing on HIV to someone else if you have a detectable viral load and cut yourself is also very low. Wash away any blood with soap and hot water and cover the wound with a sticking plaster or dressing.

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Hiv: How Its Transmitted

HIV is spread through certain body fluids, such as blood, semen , rectal fluids, vaginal fluids, and breast milk, according to the U.S. Department of Health and Human Services AIDS.gov website. The virus can be transmitted when these fluids in an infected person come into contact with mucous membranes in the rectum, vagina, penis, or mouth of another person.

While HIV can be spread during anal or vaginal sex, anal sex is riskier because there is more trauma and irritation to the mucous membranes, says Beverly Sha, MD, professor of medicine in the division of infectious diseases at Rush University Medical Center in Chicago.

Although the risk is low, HIV can also be spread through oral sex. HIV transmission can happen during ejaculation into the mouth, or if there are mouth ulcers, bleeding gums, genital sores, or other sexually transmitted diseases present, according to the Centers for Disease Control and Prevention.

Using condoms during sex lowers the risk of HIV transmission. When they are used properly, its clear they offer significant protection, Dr. Sha says. However, condoms can fail when they break, if theyre too old, or if they are not used correctly.

The virus can also spread if infected fluids come into contact with damaged tissue, such as a cut in the skin, or if infected blood is transferred from a needle or syringe. Doing injection drugs with someone who is infected and sharing equipment is high risk. HIV can be found in a used needle for as long as 42 days.

How Do You Get Aids

You need to have been infected with HIV before you can have AIDS. AIDS is a condition, as its name implies, which develops when the immune system is severely damaged by HIV. HIV is commonly transmitted by sexual behaviors with an infected partner, the sharing of needles with a person with HIV or through mother to child transmission. HIV can be spread by sexual activities that include vaginal sex, anal sex, and oral sex. HIV is spread by bodily fluids which include semen, preseminal fluid, vaginal fluid, blood and breast milk. The virus that causes AIDS is spread by breast milk during nursing or can be passed from mother to baby through birthing.

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