1. Vector Control Research Centre, (Indian Council of Medical Research) Medical Complex, Indira Nagar, Pondicherry 605006, India (sssahu1961@gmail.com; k_guna@yahoo.com; krishnamoorthyen@gmail.com; pvanamail@gmail.com; esmathi@gmail.com; ammanonmani@yahoo.com; pcsaja@gmail.com),
2. Corresponding author, e-mail: sssahu1961@gmail.com