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Doctor insights on: Human Oncogenic Viruses

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Human immunodeficiency virus--can it mutate?

Human immunodeficiency virus--can it mutate?

Yes: Hiv mutates in response to HIV therapy. If you're being treated without a complete response (partial suppression), the virus can mutate so it can replicate in the presence of the drugs. This usually happens in people who don't take their medications properly. They can then transmit the mutant virus to others. Spontaneous mutation (mutation independent of therapy) has not been a big problem. ...Read more

Virus (Definition)

A virus is a small infectious agent that can replicate only inside the living cells of an organism. Viruses can infect all types of organisms, from animals and plants ...Read more


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Is human t cell leukemia/lymphotropic virus (htlv-1) contagious?

Is human t cell leukemia/lymphotropic virus (htlv-1) contagious?

Yes: Both htlv-1 and htlv-2 are spread by sexual transmission, from mother to child, and by exposure to infective blood through transfusions and injection drug use. In this respect the virus is contagious. It does not appear it is transmitted in any other way. ...Read more

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In what viral group is human papilloma virus classified?

In what viral group is human papilloma virus classified?

HumanPapillomaVirus: Human papilloma viruses is the name of a large group of viruses. There are about 100 subtypes of human papilloma viruses; almost half can occasionally cause cancer. For example, the virus that causes ordinary skin warts (including plantar warts) is called hpv-1. Two others, hpv-16 and hpv-18, are responsible for a majority of cervical cancers and are components of both of the hpv vaccines. ...Read more

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What are human papilloma viruses (hpv)?

What are human papilloma viruses (hpv)?

DNA viruses: Hpvs are dna viruses that can cause warts, premalignancy / dysplasia, and cancers in people. Some strains are associated with skin infections and cause warts only (like warts on feet and fingers). Other strains are more commonly seen on the genitals (cervix, vagina, penis, anus, etc...) and can be spread by sexual contact. The pap test and hpv dna tests and biopsies are used to diagnose hpv. ...Read more

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What is HPV [human papilloma virus]?

An infection.: Hpv (human papilloma virus) is an infectious organism. It is a dna virus that is spread by human to human contact including sexual contacts. Some high risk strains of this virus are associated with cervical, vaginal, anal, and oral warts, precancers and cancers. ...Read more

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Can gardasil vaccine eliminate human papillomavirus?

Can gardasil vaccine eliminate human papillomavirus?

No: The goal of a vaccine is to train your immunity to be aware of an organism - viral or germ - and produce a killing response so when the real infection enters your body it will be dealt with quickly. If you already carry the HPV infection - the vaccine will not eliminate it ...Read more

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What causes the human immunodeficiency virus?

What causes the human immunodeficiency virus?

HIV: The obvious answer is that HIV causes it. But perhaps you meant "how do you get it?" you get HIV by having unsafe sex or by sharing needles/syringes by someone else who has it. ...Read more

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Human papilloma virus vaccine for boys ok?

Human papilloma virus vaccine for boys ok?

Highly recommended: The hpv vaccine has been well tolerated. It's recommended for boys at 11 or 12 through age 21 but can be given as young as 9 (and through age 26 for those at higher risk). It reduces the risk of anal cancer in boys and girls as well as the risk of cervical cancer in girls. Hopefully it will reduce some other hpv related cancers. The Gardasil hpv also reduces sexually transmitted warts by 90%. ...Read more

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Is Mycobacterium Chelonae contagious from human to human?

Not really: This bug is everywhere in our environment and only people with immune problems typically are affected/ ...Read more

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Are viruses antigens?

Are viruses antigens?

No: Infectious agent with nuclei acid molecule in a protein coat which has different antigens Antigen is a protein, toxin, or foreign substance that induces an immune response in the body like production of antibodies (humoral immunity) ...Read more

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What is the origin of human t-lymphotrophic virus? Did it originate from primates (simian viruses?)?

Probably: The human t-lymphotropic virus type i is a human RNA retrovirus that is known to cause adult t-cell leukemia and lymphoma, and a demyelinating disease called htlv-i associated myelopathy/tropical spastic paraparesis. Htlv-i is one of a group of closely related primate t lymphotropic viruses. The ones that infect old-world primates are called simian t-lymphotropic viruses. ...Read more

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What type of cell does herpesviridae (herpesvirus) infect in humans?

What type of cell does herpesviridae (herpesvirus) infect in humans?

Skin cells: The herpes virus comes in 2 types: herpes simplex (hsv) 1&2. Antibodies (igg) to both viruses can be tested to see if you have lasting immunity and (igm) short-term antibodies check to see if you have had a recent infection. Unfortunately the igg levels can not tell how long ago you were exposed. Also herpes 1 & 2 viruses can cause either oral or genital herpes. Hope that helps. ...Read more

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Can human papilloma virus cause cancer in women?

Can human  papilloma virus cause cancer in women?

HPV and cancer : Yes. Human papilloma virus is a known cause of cervical cancer, as well as some other cancers. If you had it diagnosed after a pap smear, for example, it is best to consult your gynecologist to MAP out the best plan of action for you, depending on the extent of the cellular changes and the specific species of virus involved. Some are more dangerous than others, such as types 16 & 18. ...Read more

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Are parasites contagious from human to human?

Are parasites contagious from human to human?

Depends: There are many kinds of parasites. Most are not transmitted from person to person, but some are. Giardiasis and amebiasis can be transmitted from person to person, usually during sex when there is oral-fecal or oral-anal contact. Pinworms are easily transmitted within households, especially among children. Skin parasites such as scabies and crab lice are also transmitted from person to person. ...Read more

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How did human immunodeficiency virus (hiv) evolve?

How did human immunodeficiency virus (hiv) evolve?

Evolution: It came from a simian precursor transmitted to humans by one of several mechanisms. This virus mutates continuously and the form to which it mutates which is best capable of surviving under the circumstances is the one which will be reproduced and multiply within infected cells. Unless of course you are a creationist. ...Read more

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How is human parvo virus transmitted?

How is human parvo virus transmitted?

Fifth disease: Here is a nice discussion by the cdc on your question. http://www.cdc.gov/parvovirusb19/fifth-disease.html. ...Read more

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Which type of cells does ebola virus infect?

Which type of cells does ebola virus infect?

Several types...: Ebola virus is the cause of a very serious form of hemorrhagic febrile illness that has a very high mortality rate. Ebola virus can infect several types of human cells. One of the most important of these is human lymphocytes. ...Read more

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What is the human para-influenza virus?

What is the human para-influenza virus?

CDC says....: Here's a good article to address your question: http://www.cdc.gov/parainfluenza/ ...Read more

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Explan why one human immunodeficiency virus test cannot definitely diagnose hiv?

Good question: The HIV test to which you refer is an elisa assay which is quite sensitive but not as specific as the confirmatory western blot. These measure the presence of antibodies to the HIV and these may take from 2 wks to several months to develop. If you run the test before the antibodies have appeared, it will be negative, only to change to positive once antibody formation has occurred. ...Read more

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What cause viruses in the humans body?

What cause viruses in the humans body?

Ecology of viruses: Viruses, like many other living things, are just looking for a 'home'. All of life is like that -and we can find viruses affecting not just humans but many other species of animals, even plants! The question is, 'is this virus causing a disease'? That is what doctors are for -to help you determine when to step in and take action. If you are concerned about a certain virus, ask more questions. ...Read more

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How do viruses (h5n1) transmit from the animals to the humans?

How do viruses (h5n1) transmit from the animals to the humans?

Personal contact: Research is incomplete, but so far transmission to humans from animals (mostly birds) has been uncommon (happily) and mostly personal contact. Airborne transmission does not seem important at this time, but there is fear this could change if the virus mutates. If so, and if highly transmissible (i.e. infection by only a few virus particles), the world could see major epidemics. Fingers crossed! ...Read more

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Can there be a virus or disease that only affects human beings?

Measels (rubeola).: Measels is a viral infection that is thought to infect humans only. Measles is spread through respiration (contact with fluids from an infected person's nose and mouth, either directly or through aerosol transmission), and is highly contagious. Measels can be prevented by childhood vaccination against the virus. ...Read more

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What is the human parvo virus?

What is the human parvo virus?

Parvovirus: It is a virus that causes a fever and rash in.Children. Infection causes a transient slow down in red cell formation which is important in people with hemolytic anemias like sickle cell and during pregnancy when the fetus may die. ...Read more

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How is human parvo virus transmitted?

Fifth disease: Here is a nice discussion by the cdc on your question. http://www.cdc.gov/parvovirusb19/fifth-disease.html. ...Read more

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What does a virus do to the human body?

What does a virus do to the human body?

Virus: attaches to cell membrane, cross membrane then depending on type of virus makes you sick. Great wikipedia question. ...Read more

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How does the oropouche virus affect humans?

How does the oropouche virus affect humans?

Oropouche virus: The Oropouche virus (OROV) is one of the most common orthobunyaviruses. When OROV infects humans, it causes a rapid fever illness called Oropouche fever. Much more detail at Wikipedia ...Read more

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How did the ebola virus start to invade humans?

How did the ebola virus start to invade humans?

Wbola: 1 theory is that bats are the reservoir for Ebola. Partially eaten fruit dropped by bats may be eaten by Diuker antelopes, monkeys, apes or other mammals. Eating or handling bush meat from them can transmit the disease to humans. ...Read more

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What is the parvo virus and what can it do to a human?

What is the parvo virus and what can it do to a human?

Fifth Disease: Parvo b19 virus causes upper respiratory symtpoms and low grade fever which resolve promptly, to be followed by a facial rash with a "slapped cheek" appearance. The remainder of the body soon develops rashes, sparing the palms and soles. The rash will soon show central clearing, which has a "lacy, fishnet" appearance. The illness is mild and self-limited, and the rash waxes & wanes. No treatment. ...Read more

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Is it possible for a human to be immune to all kind of virus?

Is it possible for a human to be immune to all kind of virus?

No: Viruses constantly change. Humans become immune to viruses by making antibodies. Antibodies are made only after exposure to the virus. Since there are an infinite number of possibilities of viruses the human body could potentially make antibody against all of them but the person has to be exposed to them. Unlikely that a person could live long enough to be exposed to an infinite number of viruses. ...Read more

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Does the human body even use the complement system at all to fight-off viruses?

Yes: If viral antigens or epitopes are expressed on the surface of the infected cell, then yes. They may "fix complement" leading to lysis. ...Read more

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How Nipah virus affecs on human & how it kills? What are the symptoms of affected with virus? Pls describe me about this

How Nipah virus affecs on human & how it kills? What are the symptoms of affected with virus? Pls describe me about this

See links: http://www.cdc.gov/vhf/nipah/ http://www.who.int/csr/disease/nipah/en/ NiV infection in humans has a range of clinical presentations, from asymptomatic infection (no symptoms) to acute respiratory (lung infection) syndrome and fatal encephalitis (infection of brain) ...Read more

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Is there a test that detects "reverse transcriptase" (not a specific virus) in humans?...Just as a general test to rule-out certain kinds of viruses?

No, I don't think so: I have not seen a test like that for use in patients. Although, it could be being developed or used as a part of a research study. ...Read more

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What is the origin of human t-lymphotrophic virus? Did it originate from primates (simian viruses?)?

Probably: The human t-lymphotropic virus type i is a human RNA retrovirus that is known to cause adult t-cell leukemia and lymphoma, and a demyelinating disease called htlv-i associated myelopathy/tropical spastic paraparesis. Htlv-i is one of a group of closely related primate t lymphotropic viruses. The ones that infect old-world primates are called simian t-lymphotropic viruses. ...Read more

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How can humans contract the HIV virus?

HIV: Hiv can be transmitted via anal ; oral sex, blood transfusion, use of contaminated needles, breastfeeding ; during pregnancy ; delivery. ...Read more

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How are humans infected by west nile virus?

How are humans infected by west nile virus?

Mosquito bite: West Nile Virus is a mosquito borne infection that originated in the tropics. It causes a flu-like syndrome in 20% of those infected . It causes neuroinvasive disease in ...Read more

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What is the human T-lymphotropic (HTL) virus?

What is the human T-lymphotropic (HTL) virus?

HTLV: HTLV stands for "Human T-cell Lymphotropic Virus" -essentially a family of viruses that could cause a certain cancer -- adult T-cell leukemia/lymphoma. There's another disease too called HTLV-I associated myelopathy/tropical spastic paraparesis that is serious. An infectious diseases specialist can help you get evaluated for this, if you are concerned. Some populations are at risk- like Caribbean. ...Read more