Truc Dever, spokeswoman for the vector-control district, said the Africanized bees in Southern California are now mostly a hybrid strain between the African killer bees and the European honeybees that most people are familiar with. “The hybrid bees aren’t as aggressive as the original killer bees were, but their more aggressive than the European honeybees,” Dever said. “Sometimes you hear of attacks, like those dogs, but it’s rare now.” The two different types of bees look identical to the naked eye. Only a microscopic or molecular genetic analysis can distinguish them, according to the district’s Web site. Dever said if someone is attacked by a swarm of Africanized bees, they should run away in a straight line, ideally for cover indoors. “There’s a myth that if you jump in a pool they’ll go away, but it’s not true,” Dever said. “They’ll just sit on the top until you come up for air. You don’t want to mess with them. They’re known to chase people for up to a quarter mile.”165Let’s talk business.Catch up on the business news closest to you with our daily newsletter. Something went wrong. Please try again.subscribeCongratulations! You’re all set! WHITTIER – Elizabeth Duggan was bathing her dog in her back garden recently when he suddenly began vigorously squirming and shaking his head. Duggan said she looked down and saw a bee stinging the dog on the eyelid. A moment later she felt one sting her on the head. It was then that Duggan saw the swarm of bees coming out of a hole in the brick wall – the second hive bees have built there in the past six months, she said. Three dogs in San Bernardino were killed earlier this month by a swarm of Africanized honeybees. Duggan worried that some of the “killer bees” had taken up residence in her back yard. “I became concerned after I heard about the three dogs that were killed by the African killer bees,” said Duggan, 83. “Those bees have been coming into California. I don’t know if that’s what [these bees] are, but I thought I better call someone.” Statistically, there is a good possibility that Duggan’s bees are indeed the Africanized honeybees, according to officials from the Los Angeles County Vector Control District, Aapproximately 90 percent of bees in Southern California now are the Africanized bees, the agency says. The killer bees are descended from escaped African bees that were imported from Brazil to increase honey production in the early 1950s. Over the years they migrated north through South America, Central America and Mexico – arriving in the United States in 1990. The bees have been responsible for 175 human deaths in Mexico and 14 in the U.S. since 1985.