Viral Diseases and Immunity

HPV-16 is the highest-risk oncogenic type for cervical cancer progression. High-grade SIL carries more risk than low-grade, but HPV-16 positivity (whether in low or high-grade lesions) confers the greatest risk of progression to invasive carcinoma. HIV increases risk but HPV-16 is the direct driver.

Antiretroviral therapy (ART) is the standard treatment for HIV/AIDS, which works by suppressing the replication of the HIV virus in the body. This therapy helps people with HIV live longer, healthier lives and reduces the risk of transmission. The other diseases listed have different treatment approaches - cancer uses chemotherapy/radiation, tuberculosis uses antibiotics, and malaria uses antimalarial drugs.

Epstein-Barr virus (EBV) is a herpesvirus that causes infectious mononucleosis, also known as glandular fever or 'kissing disease'. It is transmitted through saliva and does not cause the blood disorders listed in the other options.

Ring enhancing lesions in HIV patients are associated with Toxoplasma gondii infection.

When body cells are infected with viruses, they produce interferon - a group of signaling proteins that interfere with viral replication. Interferons trigger immune responses and help protect neighboring cells from infection. Properdin is part of complement system, gamma globulins are antibodies, and hybridoma is a laboratory-produced cell hybrid.

Ultra vires is a Latin phrase meaning "beyond the powers" - if an act requires legal authority and it is done with such authority. In corporate law, ultra vires describes acts attempted by a corporation that are beyond the scope of powers granted by the corporation's objects clause in articles of incorporation.

Both CMV and EBV are reported in symptomatic periapical lesions.

Cryptococcus neoformans is the most prominent medically important species. It is best known for causing a severe form of meningitis and meningo-encephalitis in people with HIV/AIDS. It may also infect organ transplant recipients and people receiving certain cancer treatments.

Patients with primary immunodeficiencies are susceptible to aspergillus species infections particularly when cell-mediated immunity is compromised.

 A person suffering from AIDS finally dies due to other infections because the AIDS virus- HIV weakens the immune system.

The HIV envelope protein gp120 binds to CD4. This targets the virus to this T-cell subset.

Pan Troglodytes Endogenous Retrovirus-1 is a retrovirus that putatively infected the chimpanzees about 4 million years ago and may have been involved in the process of speciation, making the chimpanzee and human lines diverge.

Antibody-based immune responses form a first layer of protection of the host from viral infection; however, in many cases a vigorous cellular immune response mediated by T-cells and NK-cells is required for effective viral clearance. When cellular immunity is unable to clear the virus, the infection can become chronic, and serum antibodies to the viral pathogen are used as first indicator for the diagnosis of the disease.

CD8 numbers are largely unaffected. It is the ratio of CD4:CD8 that falls dramatically.

it thereby prevents effective presentation of antigen peptides to the T-cell receptor