Although annual infection rates of cystic echinococcosis is believed to be very low in the United States, exact figures are not known because the disease is often misdiagnosed.
According to cystic echinococcosis expert Dr. Enrico Brunetti, Assistant Professor, Department of Internal Medicine, at the University of Pavia School of Medicine, the problem is that, until recently, the only basis for diagnosis was surgery, and reporting systems are sporadic at best.
In the United States, transmission of E granulosus in the dog-sheep cycle is known to occur most frequently in California, Arizona, New Mexico and Utah. However, an increasing number of wolves in states like Idaho and Montana have some biologists and medical professionals concerned that outbreaks will increase.
Infected persons may go months or even years before cysts become large…