Which of the following is a characteristic of the human immunodeficiency virus which causes AIDS
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AIDS/HIV in ChildrenWhat is HIV?Human immunodeficiency virus (HIV) is the virus that is responsible for causing acquired immune deficiency syndrome (AIDS). The virus destroys or impairs cells of the immune system and progressively destroys the body's ability to fight infections and certain cancers. In adults and adolescents, HIV is most commonly spread by sexual contact with an infected partner. In the U.S., nearly all HIV infections in children under the age of 13 are from vertical transmission, which means the virus is passed to the child when they are in their mother's womb or as they pass through the birth canal, or through breastfeeding. Before 1985, a small group of children were infected with the virus by contaminated blood products. Routine screening of blood products began in 1985. Not every child born to an HIV-infected mother will acquire the virus.
How is HIV transmitted or spread?The following are the means by which the HIV virus is spread:
No known cases of HIV/AIDS have been spread by the following:
What are the symptoms of HIV?The symptoms vary depending on the age of the child. The following are the most common symptoms of HIV infection. However, each infant, child, or adolescent may experience symptoms differently. Symptoms may include:
Persistent or severe symptoms may not surface for 10 years or more, after HIV infection first enters the body in teens and adults. This "asymptomatic" period of the infection is highly variable from person to person. But, during the asymptomatic period, HIV is actively infecting and killing cells of the immune system. Its most obvious effect is a decline in the blood levels of CD4+ cells (also called T4 cells)--the immune system's key infection fighters. The virus initially disables or destroys these cells without causing symptoms. An HIV-infected child is usually diagnosed with AIDS when the immune system becomes severely damaged or other types of infections occur. As the immune system deteriorates, complications begin to develop. The following are some common complications, or symptoms, of the onset of AIDS. However, each child may experience symptoms differently. Symptoms may include:
Some people develop frequent and severe herpes infections that cause mouth, genital, or anal sores, or a reactivation of chickenpox known as shingles. The symptoms of an HIV infection may resemble other medical conditions. Always consult your child's doctor for a diagnosis. How is HIV diagnosed?Diagnosis of HIV infection during infancy depends on the detection of the virus. Since all infants born to HIV-infected mothers have a positive antibody test at birth because of the passive transfer of the HIV antibody across the placenta, virological testing is used to confirm the diagnosis. For infants born to HIV-infected mothers, viral diagnostic testing is usually performed within the first 2 days of life, at 1 to 2 months of age, and at 4 to 6 months of age. A diagnosis of HIV infection can be made with two positive virologic tests obtained from different blood samples. For children over 18 months, adolescents, or adults, diagnosis is made by testing the blood for the presence of HIV antibody. Is it safe for children with HIV to receive routine immunizations?
Always consult with your child's doctor regarding immunizations for an HIV-infected child. What is the treatment for HIV?Individuals who are HIV positive will likely need to see a specialist. As with many other conditions, early detection offers more options for treatment. Today, there are medical treatments that can slow down the rate at which HIV weakens the immune system. However, there are other treatments that can prevent or cure the conditions associated with HIV. Anti-retroviral drug therapy may be given to a pregnant woman, which has proven to greatly reduce the chance of an infant developing HIV. A cesarean section may be recommended to reduce infant transmission from the birth canal. In the U.S., where other feeding options are available, an infected mother should be discouraged from breastfeeding her infant. Consult your child's doctor for more information regarding various drug therapies. Which of the following is the cause of AIDS?HIV or Human Immunodeficiency virus is a retrovirus that was first found in 1983. The virus is responsible for causing AIDS (acquired immunodeficiency syndrome). Once within the body the HIV infects cells of the immune system that form the body's defence system and makes them unable to fight off infections.
What are characteristics of human immunodeficiency virus?HIV isolates can be distinguished by their ability to infect and replicate to high titers in cells, to kill those cells, and to down-modulate the CD4 protein on the cell surface. In addition, their sensitivity to serum neutralization or enhancement of infection can be appreciated.
Which of the following is the characteristic of AIDS virus?Human immunodeficiency virus has certain characteristics: High selectivity. It infects only cells of the immune system, and only those that have CD4 receptors: mainly T-lymphocytes as well as monocytes, macrophages and some other cell types. The ability of the virus to mutate.
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