1. Department of Public Health and Hygiene; University of Buea; Buea Cameroon
2. Centre for International Health; University of Munich; Munich Germany
3. Research Institute; Parker University; Dallas TX USA
4. Department of Biostatistics and Epidemiology; University of North Texas Health Science Center; Fort Worth TX USA
5. Faculty of Sciences; University of Buea; Buea Cameroon
6. Department of Microbiology and Parasitology; University of Buea; Buea Cameroon
7. Laboratory Department; Regional Hospital Buea; Buea Cameroon
8. Division of Infectious Diseases and Tropical Medicine; Medical Centre of the University of Munich; Munich Germany
9. German Centre for Infection Research, Partner Site Munich; Munich Germany