Abstract
Eleven members of two resident families in Mangalore city suffered from Plasmodium falciparum, P. vivax and mixed infections of both parasites in a sequential manner despite using bed nets regularly. Malarial symptoms of febrile illness started with chills and rigors at the schools for children and at work places for adult members. Five members of first family are from the central part of the city, and six members in the second family reside ∼10 km away from the central city, their live locations as well as community health care (CHC) center were mapped using QGIS software, respectively. Interestingly, first infection started with P. falciparum followed by P. vivax in the first family. However, P. vivax appeared first in the second family followed by mixed infection, and the last infection was P. falciparum. Both the families reside in close proximities of construction sites, which correlate with the role of mosquito breeding sites and indoor biting in ongoing malaria transmission in the city.