THE Tennessee State Health Department program is essentially a county health department program. With this in mind, our county-wide malaria control programs have been built up around the full-time county health departments, and the malaria program has been made an active part of their work and sponsored locally by them. The local health departments do not do malaria control work exclusively, but carry it along as one of their major activities in their general health work. There are 9 full-time county health departments in that section of the state in which malaria is of public health significance, 5 of them located in the counties having the highest malaria morbidity and mortality.The principal malaria control problem lies in the western third of the state between the Tennessee River, which traverses the entire width of the state, and the Mississippi, our western boundary. This area is approximately 100 miles long and 100 miles wide, mostly flat, with many low hill sections. Streams are sluggish, and there are many places for mosquitoes to breed in easy flight range of most of the houses. In this section the Tennessee Department of Public Health has concentrated its major malaria control activities. Screening and other mosquito proofing of houses have been the major activities. These are important methods of malaria control, particularly where other methods of county-wide control are not economically feasible, or have not been developed far enough to demonstrate that they will insure fair results for money spent.Screening alone must not be confused with mosquito proofing. In a large percentage of tenants' homes in Tennessee screening of the doors and windows is only part of the job of preventing the ingress of anopheles. Carpenter work is often necessary, floor cracks have to be stopped up or covered, walls papered to cover cracks or holes, naphthalene put into the chimneys and other work done. In addition, inten-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.