According to National Institute of Health

gibe to National Institute of Health (NIH) (2006), Acquired Immunodeficiency Syndrome (acquired immune deficiency syndrome) is caused by Human Immunodeficiency Virus (human immunodeficiency virus) by gradually destroying CD4+ T cells (also called T-helper cells), which play a significant role in the immune response system.In a healthy subject the CD4+ T cells roll out between 800 to 1,200 cells/mm3 but when this count falls below 200 cells/mm3, the several(prenominal) is most vulnerable to timeserving infections and cancers typical of AIDS.From the above it is evident that remains has its own mechanism to prevent infections i.e., immune response system comprising of CD4+ T cells which ar actually attacked by HIV systematically destroying the CD4+ T cells. These cells are active in fighting back infections attacking the body, thus erstwhile their count falls abnormally the body is vulnerable to the so called timeserving infections which are typical of AIDS.Grant and Cock (2001 ) stated that general symptoms in the early acts include press release of weight, fever, sweating during nights, diarrhea and frequent skin disorders particularly of varicella zoster, fungal infections and pruriginous dermatitis pencil lead to itchy rashes solutioning into ulcerations and healing with pigmented macules.However the expanded exposition of AIDS states that in addition to the above mentioned symptoms an individual is stated to be suffering from AIDS if the test for HIV antibody gives a positive result subject to one or more of the following conditions Weight loss of more than 10% Cryptococcal meningitis Pulmonary or extra pulmonic terbium Kaposis Sarcoma Neurological impairment sufficient to prevent independent unremarkable activities. Candidiasis of the oesophagus and spoken region accompanied by dysphagia recurrent episodes of pneumonia with or without aetiological confirmation Invasive cervical cancerCandidiasis of the oesophagus and oral region is caused to infection by fungus in immunocompromised patients such as those suffering from AIDS and gradually no medication may be effective in future course of time ultimately leading to loss of appetite and weight.Cryptococcal meningitis is infection of the judgment and is due(p) to spread of fungus from lungs to the brain through blood circulation. People who have defects in their cell-mediated immunity such those suffering from AIDS, are susceptible to disseminated cryptococcosis. Cryptococcal meningitis is fatal. The fungus infects the nervous system causing sacking of the membranes covering the brain and spinal cord.The more frequent probable causes of HIV related diseases include cerebral toxoplasmosis and cryptococcal meningitis, cerebral toxoplasmosis most often presents as a space occupying lesion of the brain, and cryptococcosis as chronic meningitis thus brain gets make in particular and nervous system in general.One of the important opportunistic infections includes terbi um and may be detected at any stage in the course of immunodeficiency. Pulmonary tuberculosis is similar to non-HIV infected subjects in the initial stages of HIV infection, but the advanced stages of immunodeficiency exhibit disseminated and multibacillary nature of tuberculosis thus causing extensive damage to lungs in general and pulmonary system in particular.Pneumonia is an acute or chronic inflammation of lungs caused due to infection caused by a bacteria, virus or fungus. Patients suffering from AIDS easily get affect by opportunistic infections causing pneumocystis pneumonia or cytomegalovirus pneumonia.People suffering from AIDS are infected by different types of pneumonia affecting the lungs and respiratory system, thus respiratory system gets seriously affected along with the immune system.Kaposis Sarcoma is cancer of skin, mucous membranes and blood vessels. Kaposis Sarcoma is characterized by bleeding at different sites on patients skin with the formation of round or elliptical lesions about pull out inch to one inch in size.