19thcentury 2009g-121 2010f-173 20thcentury americancivilwar confederatestatesofamerica control culicidae diseases healthaspects history insecticides insectsascarriersofdisease insectvectors malaria militarypersonnel mosquitocontrol mosquitoes pathogens qx11aa1p317m2009 soldiers unitedstates wc11aa1b433m2010 yellowfever