Distribution of malarial parasites: effect of gender of construction workers.

The city of Mangalore in South India was having increasing number of malaria cases from 1990. Concerned over the import of cases through migrant construction workers, a screening was done among them using clinical and parasitological methods. This demonstrated 6.28% slide positivity rate with statistically insignificant difference in prevalence of infection between males and females. There were many asymptomatic individuals reporting positive only on peripheral smear examination. Yet, clinical symptoms like fever were found to have good predictive value on logistic regression. It was more so with the P. falciparum which is a relatively new entrant to Mangalore.