PubMed · 1210888
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A V Lobanov, I V Tarasevich. 1975. [Typhus in foreign countries].. https://pubmed.ncbi.nlm.nih.gov/1210888/
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In 1988, the World Health Assembly of the World Health Organization (WHO) resolved to eradicate poliomyelitis by 2000. Reported polio cases have decreased on all continents. In 2000, poliovirus was isolated from 24 countries, 13 in the African Region of WHO (AFR). This report summarizes the routine polio vaccination coverage, surveillance for acute flaccid paralysis (AFP) during 1999 and 2000, and the synchronization of national immunization days (NIDs) against polio during 2000 and early 2001 in 16 countries in west and central Africa.
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We and others have previously reported a hepatitis B virus (HBV)-like hepadnavirus strain which seemed to be indigenous to West African chimpanzees (Pan troglodytes verus). After that, we obtained an HBsAg-positive serum sample from a chimpanzee from Central Africa, named Bassi, belonging to another subspecies (P. troglodytes troglodytes). The full-genome nucleotide sequence of the hepadnavirus from Bassi showed a significant difference (9-26%) from those so far reported from primates including humans, chimpanzees and gorillas, suggesting a novel strain. More interestingly, however, the core antigen (HBcAg) deduced from Bassi's sequence showed only 78-82% similarity to known primate strains at the amino acid level, whereas the other strains shared more than 90% similarity. HBcAg expressed from Bassi HBV failed to react with monoclonal antibodies that were directed at an epitope borne by codons 135-145 of HBcAg of conventional hepadnaviruses. This could explain why Bassi was negative for anti-HBc in a routine test. Here we report the novel HBV strain presumably indigenous to P. troglodytes troglodytes in Central Africa.