A reverse transcription polymerase chain reaction (RT PCR) was used for detection of infectious hypodermal and haematopoietic necrosis virus (IHHNV) from the gills and subcutaneous tissue of Penaeus vannamei (10-15cm ...A reverse transcription polymerase chain reaction (RT PCR) was used for detection of infectious hypodermal and haematopoietic necrosis virus (IHHNV) from the gills and subcutaneous tissue of Penaeus vannamei (10-15cm in body size) without clinical signs. With primers 77012R and 77353F, a fragment of 356bp of IHHNV was amplified in RT PCR. The amplified product was sequenced and showed more than 98% homologue with the sequences of other IHHNV strains in Gene Bank.展开更多
Based on the reported Big liver and spleen disease virus （BLSV） gene sequence, a pair of primers was designed and a 375bp product was amplified from the total RNA extracted from homogenates of BLSV-infected livers. ...Based on the reported Big liver and spleen disease virus （BLSV） gene sequence, a pair of primers was designed and a 375bp product was amplified from the total RNA extracted from homogenates of BLSV-infected livers. Twenty liver samples were randomly collected from two commercial broiler breeder flocks in Nanjing.One of ten liver samples was positive reaction in RT-PCR in one flock but not in another. The RT-PCR detection for cDNA from BLSV was specific with the sensitivity of 4.16×10-3μg/μL. Phylogentic tree analysis suggested that the 338bp sequence of the isolated strain （BLSV-NJ2002） shared 97.3% and 83.6% nt hemologue indentities with that of Australia strain and avian HEV respectively.展开更多
文摘A reverse transcription polymerase chain reaction (RT PCR) was used for detection of infectious hypodermal and haematopoietic necrosis virus (IHHNV) from the gills and subcutaneous tissue of Penaeus vannamei (10-15cm in body size) without clinical signs. With primers 77012R and 77353F, a fragment of 356bp of IHHNV was amplified in RT PCR. The amplified product was sequenced and showed more than 98% homologue with the sequences of other IHHNV strains in Gene Bank.
文摘Based on the reported Big liver and spleen disease virus （BLSV） gene sequence, a pair of primers was designed and a 375bp product was amplified from the total RNA extracted from homogenates of BLSV-infected livers. Twenty liver samples were randomly collected from two commercial broiler breeder flocks in Nanjing.One of ten liver samples was positive reaction in RT-PCR in one flock but not in another. The RT-PCR detection for cDNA from BLSV was specific with the sensitivity of 4.16×10-3μg/μL. Phylogentic tree analysis suggested that the 338bp sequence of the isolated strain （BLSV-NJ2002） shared 97.3% and 83.6% nt hemologue indentities with that of Australia strain and avian HEV respectively.
