Karim Hegazi spends his days in a Cairo clinic taking care of animals long considered a menace in Egypt. Stray dogs roam in almost every Cairo neighborhood _ lurking in construction sites, scavenging through trash and howling nightly atop parked cars. The government says there's around 15 million of them. They bite some 200,000 people a year, according to the World Health Organization, and spread rabies, one of the world's most lethal diseases.