An expert Working Group from NSW Health and Taronga Zoo has been conducting investigations into the discovery in September of a tuberculosis (TB) infection in a chimp at the zoo. Confirmation that it was the same type of infection as found in an Asian Elephant last year has guided their investigation to try to identify plausible pathways for transfer. This has involved testing of staff and contractors, as well as checking for any common equipment, food matter or soil. No link has been found to date.As a precaution the chimp group have all been placed on an antibiotic treatment and the elephant, which has been treated for over a year, is in excellent health. The Working Group met again last week and reconfirmed that there is no increased risk to visitors to the zoo. No other animals have been found to have the infection.