Subtypes of Hepatitis B Antigen (HBAg) in Peru

Distribution of HBsAg Subtypes in the World

“…If adw has been recognized to be widespread in North, West and Central Europe and in North and South America [l,15,18,22,23,27,31,321 it is adw, which is the prevalent subtype in these parts of Europe, as it is in the Antilles and probably also in North America as shown by Shorey and Fitzgibbons [34] with their g determinant also named x [lo]. This prevalence is not the rule in South America where adw, is more often encountered than adw, in some countries, as shown here in Argentina and as found in Chile by Castillo et al [4] where 100°/o of the 82 subtyped sera were adw,.…”

“…Dutra); Sri Lanka (20) from the Medical Research Institute in Colombo (U. T. I'itaranai; Malaysia (93) from the National Blood Transfusion Service in Kuala Lumpur fC. G. Lopez); Thailand (18) from the Blood Bank Centre in Bangkok (S. Pundhau~ong); Vietnam: 51 from Bach Mai Hospital in Hanoi (Bach Quoc Tuven), and 30 from Tudu Hospital in Hochiminh (P. Jacquier); Japan (11) from Kyushu University Hospital in Tokyo (K. Okochi); French Polynesia (229)…”

Distribution of HB(s)Ag Subtypes in the World

“…If adw has been recognized to be wide spread in North, West and Central Europe and in North and South America [1,15,18,22,23,27,31,32] it is adw2 which is the prevalent subtype in these parts of Europe, as it is in the Antilles and probably also in North America as shown by Shorey and Fitzgibbons [34] with their g determinant also named x [10], This prevalence is not the rule in South America where adw4 is more often encountered than adw2 in some coun tries, as shown here in Argentina and as found in Chile by Castdio et al [4] where 100% of the 82 subtyped sera were adw4. It is quite interesting to have also localized this adw4 subtype in the Marquesas in French Polynesia, the closest archipelagos to the South-West coast of America, from where natives of Marquesas seem to have migrated.…”