Emergence of Mycobacterium orygis-Associated Tuberculosis in Wild Ruminants, India.

Tuberculosis caused by Mycobacterium orygis was detected in 2 spotted deer from a wildlife sanctuary in western India and an Indian bison from a national park in central India. Nationwide surveillance is urgently required to clarify the epidemiology of the Mycobacterium tuberculosis complex at the human-livestock-wildlife interface.

Polarization mode coupling in highly birefringent optical-fiber ring resonators.

The transmission characteristics of a polarization-maintaining optical-fiber ring resonator are examined. The resonator's response is found to be strongly dependent on the differential phase delay between the fiber birefringence axes. Large cross talk of as much as 40% between the fiber modes and splitting of the resonance notch can occur, even for very good (better than -35-dB) isolation between the fiber polarization modes.