1. Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK.
2. School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool L3 3AF, U.K.
3. LSTM Research Unit at the Organisation de Coordination pour la lutte contre les Endémies en Afrique Centrale (OCEAC), P.O. Box 288, Yaoundé, Cameroon.
4. Centre for Research in Infectious Diseases (CRID), P.O. Box 13591, Yaoundé, Cameroon.
5. Department of Biochemistry, Bayero University, PMB 3011, Kano, Nigeria.
6. Centre for Medical Research, Institute of Medical Research and Medicinal Plants Studies (IMPM), P.O. Box 13033, Yaoundé, Cameroon.
7. International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin.