‘Circumcision in the U.S. Already is very common, rendering it applicable to a limited number of males as a potential HIV prevention technique in adulthood,’ said Chongyi Wei, Dr.P.H., study author and post-doctoral associate, Pitt’s Graduate School of Public Health. ‘Our study shows that any potential advantage may likely be too small to justify implementing circumcision programs as an intervention for HIV avoidance.’.. Adult circumcision proposed for possible HIV prevention in gay men Adult circumcision has been proposed just as one HIV prevention technique for gay men, but a new research by the University of Pittsburgh Graduate School of Public Wellness presented at the XVIII International AIDS Meeting suggests it would have a very small effect on reducing HIV incidence in the United States.Total coliform and E. Coli are indicators that other disease-causing organisms could be within the water and may potentially affect public health. When sampling recognized total coliform in the drinking water of a domestic aircraft, that aircraft was disinfected and retested to make sure that the disinfection was effective. In instances where foreign flag aircraft tested positive for total coliform, those airline businesses had been notified of the positive test outcomes and suggested to disinfect and retest the aircraft. Within the first round of sampling, EPA, during and September 2004 August, randomly tested the water products on 158 aircraft nationwide. Aircraft tank water can be used in the galleys and lavatory sinks.