202nd Malaria Survey Detachment

The 202nd was activated at Camp Ellis, Ill., on 10 December 1943, in accordance with General Orders 85, Headquarters, Camp Ellis. Enlisted personnel were drawn from various casual detachments at the camp, except for three laboratory technicians who were assigned from Fort Sam Houston, Tex. Capt. Rupert L. Wenzel, SnC, and 2d Lt. (later Capt.) Leon Jacobs, SnC, joined the organization on 13 and 17 January 1944, respectively. Captain Wenzel left the unit on 24 October 1944, and Captain Jacobs assumed command.

The unit received some preliminary training in Camp Ellis and then proceeded to Camp Plauche, La., where it received specialized malaria training from 1 March to 20 April 1944, and arrived in Recife on 3 July 1944. After 10 days of quarantine, the detachments enlisted personnel were attached to the 200th Station Hospital for rations and quarters, while the officers were quartered with Headquarters, USAFSA(USA Foreign Service Adm), officers. The 202d MSD, like the 57th MCD, was assigned a theater function, and came under Headquarters, USAFSA, for the major part of its administration, only minor details being subordinated to the base command. In addition to the theater function of malaria survey work, it was charged with malaria control responsibility in the Recife military area, mainly routine larviciding, ditching, and ditch maintenance.

However, when opportunity permitted, it performed some permanent filling operations. It managed its own survey work entirely. The laboratory staff did mosquito identifications and blood surveys. In its theater survey function, it performed malaria surveys at Amapá. and Fortaleza and assisted in survey work at Natal and Belém. It performed experimental work on DDT as a mosquito larvicide and on an A-24 airplane fitted for spraying DDT. Personnel of the unit also performed fly survey and control work on Ascension Island. The unit was inactivated on 21 September 1945.

(Much more specific info can be found here about what the 202 did along and with the 57thMCD.)

Source : http://history.amedd.army.mil/booksdocs/wwii/Malaria/chapterIV2.htm