MAC bacteria should always be considered in a person with HIV infection presenting with diarrhea.The diagnosis requires consistent symptoms with two additional signs:
Chest X-ray or CT scan showing evidence of right middle lobe (or left lingular lobe) lung infection
Sputum culture or bronchoalveolar lavage culture demonstrating the infection is caused by MACDisseminated MAC is most readily diagnosed by one positive blood culture. Blood cultures should be performed in patients with symptoms, signs, or laboratory abnormalities compatible with mycobacterium infection. Blood cultures are not routinely recommended for asymptomatic persons, even for those who have CD4+ T-lymphocyte counts less than 100 cells/uL. HIV infection
MAC in patients with HIV disease is theorized to represent recent acquisition rather than latent infection reactivating (which is the case in many other opportunistic infections in immunocompromised patients).The risk of MAC is inversely related to the patients CD4 count and increases significantly when the CD4 count decreases below 50 cells/mm³. Other risk factors for acquisition of MAC infection include using an indoor swimming pool, consumption of raw or partially cooked fish or shellfish, bronchoscopy and treatment with granulocyte stimulating factor. Disseminated disease was previously the common presentation prior to the advent of highly active antiretroviral therapy (HAART). Today, in regions where HAART is the standard of care, localized disease presentation is more likely. This generally includes a focal lymphadenopathy/lymphadenitis. Prevention
People with AIDS are given macrolide antibiotics such as azithromycin for prophylactic treatment.People with HIV infection and less than 50 CD4 cells/uL should be administered prophylaxis against MAC.
Halls is a plural of the word hall. Halls may also refer to:

People
Walter Halls (1871–1953), British trade unionist and politician
Ethel May Halls (1882–1967), American actress
Julian Halls (born 1967), British field hockey player
Evelyn Halls (born 1972), Australian fencer
Roxana Halls (born 1974), English artist
Monty Halls (born 1976), British marine biologist and TV presenter
John Halls (born 1982), English footballer, mostly played for Stoke, Brentford and Aldershot, and model
Andy Halls (born 1992), English footballer, has played for Stockport, Macclesfield and Chester
Halls (footballer) (born 1999), Brazilian footballer
Henrique Halls (born 2002), Brazilian footballer

Places
Halls, Georgia, an unincorporated community
Halls, Missouri, an unincorporated community
Halls, Tennessee, a town in West Tennessee
Not to be confused with Halls Crossroads, Tennessee, a suburb of Knoxville sometimes colloquially referred to as "Halls"

Business
Halls (cough drop), a brand of cough drop
Geo. Hall & Sons, a defunct Australian soft drink company
Halls (department store), Kansas City, Missouri, United States