By Everard L. Napier, M.R.C.S., L.R.C.P. (Lond.). In charge Kala-azar research, Calcutta School of Tropical Medicine. Second edition. 185 pages of text with 15 charts in the text, 18 plates, and an appendix of references to literature, author index and subject index. Oxford University Press. London, Bombay, Calcutta, Madras, 1927
In a survey of 4,220 human sera from five populations in the Southwest Pacific region, hepatitis B antigen (HB Ag) was detected in 362 (8.6%) and HB antibody in 19 (0.45%). The incidence of HB Ag varied significantly between geographic regions, and it occurred more frequently in males than in females. In the two populations from which the largest samples were obtained the proportion of positive sera increased with age to reach a maximum in the 2nd decade of life, and then declined.