Sept/Oct 2009 Quiz

Question 1 of 10

A 2007 USDA NAHMS study reported that at least 68 percent of the dairy herds in the U.S. contained Johnes infected cows. That number is higher for herds with greater than 500 animals. What is the infection rate in herds greater than 500 cows? — pg 615

75 percent

95 percent

80 percent

99 percent