- Associated Press - Wednesday, June 4, 2014

PORTLAND, Ore. (AP) - Oregon Zoo officials in Portland say tuberculosis test results for a third zoo elephant are puzzling and they plan additional tests.

The Oregonian reports (http://is.gd/Mbk2a9 ) that results of a March trunk culture taken from 44-year-old Tusko showed the presence of an organism known to cause TB. However, a follow-up test showed Tusko had not produced the antibodies that indicate TB. Tusko is acting healthy and normal.

Two other bull elephants - 52-year-old Packy and his son Rama - were diagnosed with TB last year. Zoo vet Tim Storms says in a statement that they are being treated and have not shown any signs of illness. They have been separated from the rest of the herd since their diagnosis.

The chronic disease attacks the respiratory system and can be fatal if not treated. The zoo’s four female elephants and the 5-year-old male Samudra have tested negative.

___

Information from: The Oregonian, http://www.oregonlive.com