Deer ticks in Wisconsin and Minnesota recently have been found to carry new species of Lyme and ehrlichiosis bacteria, which can cause fever, chills, muscle pain, headache, fatigue and other symptoms.

“It seems like every year we have more people getting infected with tick-borne disease and more kinds of tick-borne disease,” said Susan Paskewitz, a UW-Madison entomologist.

In confirming there is no doubt that the mosquito-borne Zika virus can cause severe birth defects such as microcephaly, a small brain, Dr. Sonja Rasmussen of the Centers for Disease Control and Prevention said pregnant women and others should wear long pants and long sleeves, or use repellent, and get rid of pools of standing water.

“It’s always important for pregnant women, and actually for everybody, to not get bitten by mosquitoes,” Rasmussen said. “It’s really important to make sure there isn’t standing water that is a breeding place near houses.”

At least 358 Americans, including 31 pregnant women, have developed Zika by traveling to affected countries such as Brazil, according to the CDC. In U.S. territories such as Puerto Rico, at least 475 cases have been acquired, including 58 in pregnant women.