COALINGA, Calif. — When any of the 5,300 inmates at Pleasant Valley State Prison begin coughing and running a fever, doctors do not think flu, bronchitis or even the common cold. They think valley fever; and, more often than they would like, they are right. In the past three years, more than 900 inmates at the prison have contracted the fever, a fungal infection that has been both widespread and lethal. At least a dozen inmates here in Central California have died from the disease, which is on the rise in other Western states, including Arizona, where the health department...