1.   Gorgas and his sanitation crews went house to house and building to building, getting rid of every potential mosquito breeding site for Aedes aegypti in the entire city.

2.   Scientists say these lands are essential because they provide the frog with the necessary habitat for food, water, shelter and breeding sites to grow the population.

3.   The county keeps tabs on likely breeding sites and tries to treat them.

4.   The largest known breeding site is in Mexico.

5.   We went climbing through backyards, looking in carports, peering amid the tropical flowers, looking for breeding sites.

6.   With rain and flooding, the mosquito population increases because the insects have many suitable breeding sites.

7.   Breeding sites are increasing as forests are cleared and irrigation put in place.

8.   Breeding sites of the mosquitoes that spread malaria were also being sprayed with insecticide.

9.   But many of the mosquitoes and their larvae were destroyed in an early campaign to eliminate breeding sites.

10.   Forests were cleared and sunlit still waters became mosquito breeding sites.