A strain of chlamydia is ravaging koala populations, but ultrasound evaluation is helping curb its spread. Chlamydia causes reproductive problems and blindness in koalas, and as many as 90% of the animals in certain areas of Australia are affected. Scientists began using ultrasound evaluation to identify the telltale thickening in organ walls and other signs of disease, making the diagnosis more quickly so the 28-day course of treatment can begin.

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