No bigger than a freckle, the tiny deer tick has sown panic from Montauk to Minneapolis as a carrier of Lyme disease -- an illness that has struck more than 71,000 Americans and left hundreds permanently disabled. Now the minuscule pest is causing even greater alarm. Scientists say deer ticks harbor yet another pathogen, which, unlike the one responsible for Lyme disease, can-in rare cases-actually kill a person in a matter of days.
How worried should Americans be? Plenty, suggests David Quinn, 41, who lives in Briarcliff Manor, New York. An avid jogger, Quinn was stretching in his backyard when he...