Hapten sulfaguanidine （SG） was coupled with carrier protein bovine serum albumin （BSA） to form a full antigen SG- BSA by diazotization and glutaraldehyde methods. Ovalbumin （OVA） was used as protein carrier to c...Hapten sulfaguanidine （SG） was coupled with carrier protein bovine serum albumin （BSA） to form a full antigen SG- BSA by diazotization and glutaraldehyde methods. Ovalbumin （OVA） was used as protein carrier to couple with Hapten SG by glutaraldehyde method. Then, the immunogen and the coating antigen were purified by dialysis and gel exclusion chromatography. The conjugated ratio of SG to BSA in artificial antigen was 5.3 （using diazotization method） and 6.5 （glutaraldehyde method）, and the conjugated ratio of SG to OVA in coating antigen was 2.3 （glutaraldehyde method） by UV-visible spectrophotometer. The coupling was successful according to the analysis of sodium dodecyl sulphate polyacrylamide gel electrophoresis （SDS-PAGE）. BALB/c mice were immunized with the antigen （SG-BSA）, and the titers of antiserum were tested to be 1 ： 6 400 and 1 ： 400 after three periods of immunities by indirect ELISA, which further identified the success of the synthesis of both immunogen SG-BSA and coating antigen SG-OVA.展开更多
Banana streak virus (BSV) and Sugarcane bacilliform virus (SCBV) are two badnaviruses commonly found in all banana growing areas of the world. It is a threat to the production and improvement of Musa germplasm. In Bur...Banana streak virus (BSV) and Sugarcane bacilliform virus (SCBV) are two badnaviruses commonly found in all banana growing areas of the world. It is a threat to the production and improvement of Musa germplasm. In Burkina Faso, the presence of badnaviruses was reported in banana producing regions. The objective of this study was to determine the prevalence of BSV and SCBV in banana production areas of Burkina Faso. A survey followed by a symptomatologic study was conducted in banana plantations in 27 localities of the nine main banana producing regions from July to October 2018 and September to December 2020. In all, 251 leaf samples were collected and analysed for BSV and SCBV infection by Indirect Antigen Coated Plate Assay-ELISA followed by amplification of the RT/RNase H region using Polymerase chain reaction with Badna FP/RP and SCBV F/R primers, respectively. A variety of symptoms were observed on almost all plant organs which were revealed due to BSV by symptomatologic study. The results of serological and molecular diagnosis revealed a high overall prevalence of BSV in 80.48% of the samples tested. BSV was distributed in seven survey regions out of nine with prevalence ranging from 10% to 100% in North, Centre, Centre West, Hauts Bassins, Cascades, Centre East and Boucle of Mouhoun regions. Very low prevalence was recorded for SCBV in Cascades and East Centre region with 4.35 and 12.5%, respectively. Species detection using specific primers to each species revealed three main species: Banana streak Obino l’ewaï virus (BSOLV), Goldfinger virus (BSGFV) and Imové virus (BSIMV) in the samples tested, respectively in the proportions of 23%, 8% and 0.8%. Co-infection between BSV species was also detected.展开更多
文摘Hapten sulfaguanidine （SG） was coupled with carrier protein bovine serum albumin （BSA） to form a full antigen SG- BSA by diazotization and glutaraldehyde methods. Ovalbumin （OVA） was used as protein carrier to couple with Hapten SG by glutaraldehyde method. Then, the immunogen and the coating antigen were purified by dialysis and gel exclusion chromatography. The conjugated ratio of SG to BSA in artificial antigen was 5.3 （using diazotization method） and 6.5 （glutaraldehyde method）, and the conjugated ratio of SG to OVA in coating antigen was 2.3 （glutaraldehyde method） by UV-visible spectrophotometer. The coupling was successful according to the analysis of sodium dodecyl sulphate polyacrylamide gel electrophoresis （SDS-PAGE）. BALB/c mice were immunized with the antigen （SG-BSA）, and the titers of antiserum were tested to be 1 ： 6 400 and 1 ： 400 after three periods of immunities by indirect ELISA, which further identified the success of the synthesis of both immunogen SG-BSA and coating antigen SG-OVA.
文摘Banana streak virus (BSV) and Sugarcane bacilliform virus (SCBV) are two badnaviruses commonly found in all banana growing areas of the world. It is a threat to the production and improvement of Musa germplasm. In Burkina Faso, the presence of badnaviruses was reported in banana producing regions. The objective of this study was to determine the prevalence of BSV and SCBV in banana production areas of Burkina Faso. A survey followed by a symptomatologic study was conducted in banana plantations in 27 localities of the nine main banana producing regions from July to October 2018 and September to December 2020. In all, 251 leaf samples were collected and analysed for BSV and SCBV infection by Indirect Antigen Coated Plate Assay-ELISA followed by amplification of the RT/RNase H region using Polymerase chain reaction with Badna FP/RP and SCBV F/R primers, respectively. A variety of symptoms were observed on almost all plant organs which were revealed due to BSV by symptomatologic study. The results of serological and molecular diagnosis revealed a high overall prevalence of BSV in 80.48% of the samples tested. BSV was distributed in seven survey regions out of nine with prevalence ranging from 10% to 100% in North, Centre, Centre West, Hauts Bassins, Cascades, Centre East and Boucle of Mouhoun regions. Very low prevalence was recorded for SCBV in Cascades and East Centre region with 4.35 and 12.5%, respectively. Species detection using specific primers to each species revealed three main species: Banana streak Obino l’ewaï virus (BSOLV), Goldfinger virus (BSGFV) and Imové virus (BSIMV) in the samples tested, respectively in the proportions of 23%, 8% and 0.8%. Co-infection between BSV species was also detected.
