Clemidia is caused by a different type of bacteria, and the symptoms can be really severe. Clemidia an quales causes conjunctivitus, and that can get super severe, and it can lead to blindness and bad cases. If the infection gets up into a coalas kidneys, it can be fatal. And the survivors are often made sterile by the infection as well. So it's a massive, massive problem for coalas. How widespread is it? Very, very widespread. There are very few now in australia that are totally free of clamidia. Michael pyne: The epidemics growing the arais where thee's very high levels of comidia tend