| distribution of antibodies to influenza a virus in chickens in japan. | a serological surveillance was carried out to detect antibody against influenza a virus in chicken sera. a total of 8,850 field samples were collected from 47 prefectures in japan. initially, all the sera were screened by agar gel immunodiffusion and those sera showing positive reaction were investigated for haemagglutination-inhibition (hi) and neuraminidase-inhibition antibodies against influenza viruses. only 6 samples had antibodies; 4 sera had antibodies against human subtype h1n1 virus; wi ... | 1995 | 8720048 |
| a rare appearance of influenza a(h1n2) as a reassortant in a community such as yamagata where a(h1n1) and a(h3n2) co-circulate. | to find a new influenza subtype a(h1n2), 383 isolates identified as h1 by hemagglutination inhibition test between the 1998-1999 and 2001-2002 seasons in yamagata, japan, were screened by reverse transcription polymerase chain reaction. as a result, 3 strains from the 1999-2000 season were identified as possibly being a(h1n2). although several of their clones were found to be a(h1n2), a(h1n1) and a(h3n2), we could not confirm the origin of the a(h1n2) clones without the original specimens. these ... | 2003 | 12825897 |
| [epidemiological study of health impact on influenza outpatients during 2008-2009 influenza season, shonai, yamagata]. | to make up for the lack of data on influenza-like illness (ili), we studied patterns among 6,828 ili patients seen at 34 healthcare facilities during the 2008-2009 influenza season in shonai, yamagata, japan. healthcare facilities were classified into 1) hospitals, 2) pediatric clinics, 3) internal medicine and pediatric clinics, 4) internal medicine clinics, and 5) others. the majority went to hospitals, but the highest percentage in all outpatient visits was 13.7% seen at pediatric clinics dur ... | 2010 | 20170015 |