Leo Correa/AP PhotoBrazil's health minister says the country will mobilize some 220,000 troops to battle the mosquito blamed for spreading a virus suspected of causing birth defects, but he also was quoted Tuesday as saying the battle already is being lost. Marcelo Castro said that nearly 220,000 members of Brazil's Armed Forces would go door-to-door to help in mosquito eradication efforts ahead of the country's Carnival celebrations, according to Rio de Janeiro's O Globo newspaper.