| prevalence of "norwalk-like virus" infections in outbreaks of acute nonbacterial gastroenteritis observed during the 1999-2000 season in osaka city, japan. | we have investigated the incidence of norwalk-like viruses (nlvs) associated with outbreaks of acute nonbacterial gastroenteritis in osaka city, japan, since april 1996 using reverse transcription (rt)-pcr and electron microscopy methods. from the results of the first 3 years, between april 1996 and march 1999, we previously reported that multiple genetic types of nlvs were detected in 71.9% of outbreaks using rt-pcr with ando's primers except for one outbreak [iritani et al., 2000]. however, du ... | 2002 | 11748669 |