title: Enterically transmitted non-A, non-B hepatitis: serial passage of disease in cynomolgus macaques and tamarins and recovery of disease-associated 27- to 34-nm viruslike particles.
abstract: An experimental model of enterically transmitted non-A, non-B hepatitis (ET-NANBH) was established in tamarins (Saguinus mystax mystax) and cynomolgus macaques (Macaca fascicularis). First-passage animals were inoculated with two different stool suspensions obtained from human patients with well-defined ET-NANBH that originated from Burma and Pakistan, where epidemics of ET-NANBH occur. Both inocula contained 27- ato 34-nm-diameter viruslike particles (VLPs) that were specifically aggregated by acute-phase ET-NANBH sera. ET-NANBH was subpassaged in both tamarins and cynomolgus macaques by using pools of stool suspensions from first-passage animals. One additional passage of disease in cynomolgus macaques resulted in a significantly shortened incubation period and increased severity of disease. VLPs similar to those found in the human inocula were observed in stool specimens of first-, second-, and third-passage cynomolgus macaques and in first- and second-passage tamarins. Our findings indicate that cynomolgus macaques are particularly suitable experimental models for studies of human ET-NANBH. The 27- to 34-nm VLPs found in infected human and primate stools appear to be etiologically linked to disease.
mesh_terms: D000818:Animals; D002143:Callitrichinae; D004195:Disease Models, Animal; D005243:Feces / Q000382:microbiology; D006526:Hepatitis C / Q000382:microbiology / Q000473:pathology / Q000635:transmission*; D006518:Hepatitis Viruses / Q000302:isolation & purification / Q000648:ultrastructure; D006525:Hepatitis, Viral, Human / Q000635:transmission*; D006801:Humans; D008099:Liver / Q000473:pathology; D008252:Macaca fascicularis