About 642 household/contact members were identified and tested for Malaria. Majority were peasants (35.4%). The median age was 20 years (IQR = 10-31). Female contributed (51%) where majority of the contacts came from Arusha region (73%). Of the tested contacts, 24(4%) tested mRDT positive. Introduced cases were majority of the tested contact cases (58%). Children under five years accounted for least of mRDT positive cases. Contact members who had no history of fever 3 days prior to testing had 96% lower odds of testing mRDT positive than those who had fever (AOR=0.04; 95%CI; 0.01–0.15, p&amp;lt;0.001) whereas, individuals who had no history of contact with a known malaria case had over 99% lower odds of testing positive for malaria than those who had history of contact (AOR=0.01; 95% CI; 0.004–0.04, p&amp;lt;0.001). 

