[Objective]The aim was to study the distribution of Ca in bagged apple fruit and the relationship between antioxidant enzyme activity and bitter pit disease,which will provide a basis for resolving Ca metabolism disor...[Objective]The aim was to study the distribution of Ca in bagged apple fruit and the relationship between antioxidant enzyme activity and bitter pit disease,which will provide a basis for resolving Ca metabolism disorder in apple cultivation. [Method]With Fuji Apple as the tested material,the changes of Ca2+ content and antioxidant enzyme activity in different parts of apple fruit after picking bags and storage period were determined. [Result]The results showed that Ca contents in the light surface of fruits were higher than that in the backlight surface. The Ca contents of stalk cavity were higher than that of calyx-end. The activities of SOD,POD,CAT and APX in the light surface of fruits were higher than that in the backlight surface. The activities of SOD,POD,CAT and APX of stalk cavity were higher than that of calyx-end. The contents of MDA in the light surface of fruits were lower than that in the backlight surface. The contents of MDA of stalk cavity were lower than that of calyx-end. [Conclusion]The incidence rate of bitter pit in the light surface of fruits were lower than that in the backlight surface,and the incidence rate of bitter pit of stalk cavity were lower than that of calyx-end.展开更多
[Objective] This study was to develop a live vector vaccine of goat pox virus of Peste des petits ruminants(PPR). [Method] Using PCR amplification technique, PPR H gene was obtained, then ligated into pGEM-T easy vect...[Objective] This study was to develop a live vector vaccine of goat pox virus of Peste des petits ruminants(PPR). [Method] Using PCR amplification technique, PPR H gene was obtained, then ligated into pGEM-T easy vector; the recombinants were digested by Nhe Ⅰ and Hind Ⅲ, and ligated into pEGFP-N1-P7.5, yielding the recombinant vector pEGFP-N1-P7.5-H; next the expression cassette EGFP-N1-P7.5-H was first released from recombinant vector pEGFP-N1-P7.5-H by double digestion of Hind Ⅲ and Nhe Ⅰ and ligated into pUC119-TK that was digested by Kpn Ⅰ, yielding the transfer vector pUC119-TK-EGFP-P7.5-H. [Result] Identification and double enzyme digestion showed that the transfer vector pUC119-TK-EGFP-P7.5-H was correctly constructed. From the transfer vector transfected BHK-21 cells which infected GTPV AV41, specific fluorescence was observed at 48th h of transfection. [Conclusion] The construction of goat poxvirus live vector laid a foundation for the live vector vaccine of PPR vaccine.展开更多
[Objective] The aim was to provide theoretical basis for effective prevention of goat pox disease.[Method] 5 cases of infected goats were diagnosed for goat pox with microbiology examination.The poxes on their skin,ru...[Objective] The aim was to provide theoretical basis for effective prevention of goat pox disease.[Method] 5 cases of infected goats were diagnosed for goat pox with microbiology examination.The poxes on their skin,rumen,reticulum,omasum,abomasum and submandibular lymph nodes,bronchial lymph nodes,lung and spleen were macroscopically and microscopically observed with pathanatomical and histopathological technique.[Result] Poxes on skin mainly showed ashen hemisphere state and gave prominence to the surface of skin; some cases had hemorrhage in the poxes and showed dark purplish red.Poxes on gastric mucosa showed ashen.Cytoplasmic inclusion body could be all observed in epithelial cells of the poxes and macrphages of lymph node,lung and spleen.[Conclusion] Poxes on skin,lung and the surface of gastric mucosa as well as cytoplasmic inclusion body in the epithelial cells of pox and the macrphages of lymphoid organs were the especial pathochanges of goat pox,which could be taken as the proof of goat pox's clinic diagnisis.展开更多
[Objective] The study aimed to clone RPO30 gene from Sheeppox virus (SPPV) and predict the structure and function of the sequence. [Method] RPO30 gene of SPPV was cloned with PCR, linked into pMD18-T simple vector a...[Objective] The study aimed to clone RPO30 gene from Sheeppox virus (SPPV) and predict the structure and function of the sequence. [Method] RPO30 gene of SPPV was cloned with PCR, linked into pMD18-T simple vector and then transformed into E. coli DH5a. In blue-white screen, the white colonies were selected to prepare plasmids. The positive plasmids were selected by double digestion and PCR, and then sequenced. Finally, the structure and function of the sequence obtained were predicted by bioinformatics methods. [Results] The RPO30 gene was successfully obtained; its ORF was 585 bp, encoding 193 amino acids and containing a recognition site for Hind III. Moreover, the SPPV RPO30 gene shared different homologies with the RPO30 gene sequences of other pox virus strains from GenBank database. Further analysis by biological software showed that in RPO30 protein, amino acids 4-12, 18-26, 50- 61, 68- 92 and 176-190 had a high possibility to form the active center, and acting to these regions was likely to inactivate the enzyme encoded by the sequence, thus to inhibit viral replication efficiently. [Conclusion] This study will lay foundation for further study on the structure and function of RPO30.展开更多
Differential susceptibility SIR epidemic models with time delay and pulse vaccination is studied in this paper. We show that there exists an infection-free periodic solution by using the comparison method, which is gl...Differential susceptibility SIR epidemic models with time delay and pulse vaccination is studied in this paper. We show that there exists an infection-free periodic solution by using the comparison method, which is globally attractive provided that R1 〈 1, and that R2 〉 1 implies the disease is permanent, which means that after some period of time the disease will become endemic.展开更多
Tea is a perennial and evergreen plant. Cultivated tea trees provide a habitat for insect pests and their natural enemies. In Japan, granuloviruses (GVs) have successfully controlled two of the most important pests of...Tea is a perennial and evergreen plant. Cultivated tea trees provide a habitat for insect pests and their natural enemies. In Japan, granuloviruses (GVs) have successfully controlled two of the most important pests of tea, Adoxophyes honmai and Homona magnanima (Tortricidae: Lepidoptera). The GVs are produced in vivo and a single application sustains pesticidal efficacy throughout a year, which encompasses 4 to 5 discrete generations of both species. A. honmai and H. magnanima also have various natural enemies, especially hymenopteran parasitoids. Such resident natural enemies also play a role in reducing the pest density in virus-controlled fields, but the effect of virus infection on parasitoids sharing the same host larva has not been well studied. Survival of one of the major parasitoids of A. honmai, Ascogaster reticulata (Braconidae: Hymenoptera), is reduced by virus infection of the host. Viruses, including GV and entomopoxvirus (EPV), and certain koinobiont endoparasitoids, including A. reticulata, are both known to regulate host endocrinology. However, the GV and EPV have distinct host regulation mechanisms, and consequently have different impacts on the survival of A. retuculata, when A. reticulata parasitizes a host that is infected with either GV or EPV. These additional effects on host regulation displayed by both viruses and parasitoids affect the outcome of virus-parasitoid interactions.展开更多
In the present study,the partial gene sequences of P32 protein,an immunogenic envelope protein of Capripoxviruses (CaPV),were analyzed to assess the genetic relationship among sheeppox and goatpox virus isolates,and r...In the present study,the partial gene sequences of P32 protein,an immunogenic envelope protein of Capripoxviruses (CaPV),were analyzed to assess the genetic relationship among sheeppox and goatpox virus isolates,and restriction enzyme specific PCR-RFLP was developed to differentiate CaPV strains.A total of six goatpox virus (GTPV) and nine sheeppox virus (SPPV) isolates of Indian origin were included in the sequence analysis of the attachment gene.The sequence analysis revealed a high degree of sequence identity among all the Indian SPPV and GTPV isolates at both nucleotide and amino acid levels.Phylogenetic analysis showed three distinct clusters of SPPV,GTPV and Lumpy skin disease virus (LSDV) isolates.Further,multiple sequence alignment revealed a unique change at G120A in all GTPV isolates resulting in the formation of Dra I restriction site in lieu of EcoR I,which is present in SPPV isolates studied.This change was unique and exploited to develop restriction enzyme specific PCR-RFLP for detection and differentiation of SPPV and GTPV strains.The optimized PCR-RFLP was validated using a total of fourteen (n=14) cell culture isolates and twenty two (n=22) known clinical samples of CaPV.The Restriction Enzyme specific PCR-RFLP to differentiate both species will allow a rapid differential diagnosis during CaPV outbreaks particularly in mixed flocks of sheep and goats and could be an adjunct/supportive tool for complete gene or virus genome sequencing methods.展开更多
To evaluate maternal hepatitis B virus (HBV) DNA as risk for perinatal HBV infection among infants of HBV-infected women in California. METHODSRetrospective analysis among infants born to hepatitis B surface antigen (...To evaluate maternal hepatitis B virus (HBV) DNA as risk for perinatal HBV infection among infants of HBV-infected women in California. METHODSRetrospective analysis among infants born to hepatitis B surface antigen (HBsAg)-positive mothers who received post vaccination serologic testing (PVST) between 2005 and 2011 in California. Demographic information was collected from the California Department of Public Health Perinatal Hepatitis B Program databaseand matched to birth certificate records. HBV DNA level and hepatitis B e antigen (HBeAg) status were obtained from three large commercial laboratories in California and provider records if available and matched to mother infant pairs. Univariate analysis compared infected and uninfected infants. Multivariate analysis was restricted to infected infants and controls with complete maternal HBV DNA results using a predefined high HBV DNA level of > 2 × 10<sup>7</sup> IU/mL, a 5:1 ratio of cases to controls and a two-sided confidence level of 95%. RESULTSA total of 17687 infants were born to HBsAg positive mothers in California between Jan 1 2005 and Dec 31, 2011. Among 11473 infants with PVST, only 125 (1.1%) were found to be HBV infected. Among these infected infants, lapses in Advisory Committee on Immunization Practices recommended post exposure prophylaxis (PEP) occurred in only 9 infants. However, PEP errors were not significantly different between infected and uninfected infants. Among the 347 uninfected and infected infants who had maternal HBeAg and HBV DNA level, case-control analysis found HBeAg positivity (70.4% vs 28.9%, OR = 46.76, 95%CI: 6.05-361.32, P < 0.001) and a maternal HBV DNA level ≥ 2 × 10<sup>7</sup> IU/mL (92.6% vs 18.5%, OR = 54.5, 95%CI: 12.22-247.55, P < 0.001) were associated with perinatal HBV infection. In multivariate logistic regression, maternal HBV DNA level ≥ 2 × 10<sup>7</sup> IU/mL was the only significant independent predictor of perinatal HBV infection. CONCLUSIONIn California, transmission is low and most infected infants receive appropriate PEP and vaccination. Maternal HBV DNA ≥ 2 × 10<sup>7</sup> IU/mL is associated with high risk of perinatal infection.展开更多
Dose-dependent IgY antibody response to different amounts oforthopox virus (OPV) antigen has been studied in immunized chickens for two different OPV strains (vaccinia virus, 7.0× 10^6 PFU and cowpox virus, 9....Dose-dependent IgY antibody response to different amounts oforthopox virus (OPV) antigen has been studied in immunized chickens for two different OPV strains (vaccinia virus, 7.0× 10^6 PFU and cowpox virus, 9.2× 10^7PFU). The antibody responses to different immunizations were tested and compared by indirect immunofluorescence antibody test. Our results, together with the literature, show that the antigen dose used for immunization plays an important role for the production of specific Abs. An increase in antigen concentration may achieve higher Ab titers but, dependent on the immunogenicity of OPV antigen, it can also lead to an immune depression. However, in this study we found that OPV played a positive correlation between antigen concentration and Ab-titer.展开更多
In Egypt,protection of cattle against lumpy skin disease (LSD) was carried out using a sheep poxvirus (Kenyan strain) vaccination strategy.In the present study 15 skin nodules from LSD suspected cows and 5 scab sample...In Egypt,protection of cattle against lumpy skin disease (LSD) was carried out using a sheep poxvirus (Kenyan strain) vaccination strategy.In the present study 15 skin nodules from LSD suspected cows and 5 scab samples from sheep pox (SP) suspected sheep were collected.Hyperimmune rabbit sera to Lumpy skin disease virus (LSDV)/Ismailyia88 strain and sheep pox virus (SPV)/ Kenyan vaccinal strain were prepared.The causative agent in the collected samples was identified using immunoflourescence (IF) and immunoperoxidase techniques.Of the 15 skin nodules suspected of LSD,10 showed a positive reaction and 3 out of 5 skin scabs suspected of sheeppox were found to be positive.An antigenic correlation between field skin isolate of LSDV,tissue culture adapted LSDV/Ismailyia88 strain,field skin isolate of SPV and SPV/Kenyan vaccinal strain was studied using prepared hyperimmune sera.Also,nucleotide sequence of the PCR amplified attachment gene fragments of field skin isolate of LSDV,tissue culture adapted LSDV/Ismailyia88 strain,field skin isolate of SPV and SPV /Kenyan vaccinal strain were compared.The results revealed that the four used viruses were antigenically identical.Sequence analysis indicated that field skin LSDV isolate is more related to tissue culture adapted LSDV/Ismailyia88 strain than to vaccinal SPV/ Kenyan strain and the skin isolate of SPV is more closely related to field skin isolate of LSDV than to SPV/Kenyan vaccinal strain.Thus,further study should be applied on the advantage of a LSD vaccine prepared from LSDV in protection of cattle against LSD compared to the commonly used sheep pox vaccine.展开更多
基金Supported by National Natural Science Foundation Project " Relationship between Distribution of Calcium in Bagged Apple Fruit and Bitter Pit" (30871683)Education Department Project of Shandong Province (J06K56)~~
文摘[Objective]The aim was to study the distribution of Ca in bagged apple fruit and the relationship between antioxidant enzyme activity and bitter pit disease,which will provide a basis for resolving Ca metabolism disorder in apple cultivation. [Method]With Fuji Apple as the tested material,the changes of Ca2+ content and antioxidant enzyme activity in different parts of apple fruit after picking bags and storage period were determined. [Result]The results showed that Ca contents in the light surface of fruits were higher than that in the backlight surface. The Ca contents of stalk cavity were higher than that of calyx-end. The activities of SOD,POD,CAT and APX in the light surface of fruits were higher than that in the backlight surface. The activities of SOD,POD,CAT and APX of stalk cavity were higher than that of calyx-end. The contents of MDA in the light surface of fruits were lower than that in the backlight surface. The contents of MDA of stalk cavity were lower than that of calyx-end. [Conclusion]The incidence rate of bitter pit in the light surface of fruits were lower than that in the backlight surface,and the incidence rate of bitter pit of stalk cavity were lower than that of calyx-end.
文摘[Objective] This study was to develop a live vector vaccine of goat pox virus of Peste des petits ruminants(PPR). [Method] Using PCR amplification technique, PPR H gene was obtained, then ligated into pGEM-T easy vector; the recombinants were digested by Nhe Ⅰ and Hind Ⅲ, and ligated into pEGFP-N1-P7.5, yielding the recombinant vector pEGFP-N1-P7.5-H; next the expression cassette EGFP-N1-P7.5-H was first released from recombinant vector pEGFP-N1-P7.5-H by double digestion of Hind Ⅲ and Nhe Ⅰ and ligated into pUC119-TK that was digested by Kpn Ⅰ, yielding the transfer vector pUC119-TK-EGFP-P7.5-H. [Result] Identification and double enzyme digestion showed that the transfer vector pUC119-TK-EGFP-P7.5-H was correctly constructed. From the transfer vector transfected BHK-21 cells which infected GTPV AV41, specific fluorescence was observed at 48th h of transfection. [Conclusion] The construction of goat poxvirus live vector laid a foundation for the live vector vaccine of PPR vaccine.
基金Supported by Science and Technology Innovation Talents Support Project in University of Henan Province (2010HASTIT026)~~
文摘[Objective] The aim was to provide theoretical basis for effective prevention of goat pox disease.[Method] 5 cases of infected goats were diagnosed for goat pox with microbiology examination.The poxes on their skin,rumen,reticulum,omasum,abomasum and submandibular lymph nodes,bronchial lymph nodes,lung and spleen were macroscopically and microscopically observed with pathanatomical and histopathological technique.[Result] Poxes on skin mainly showed ashen hemisphere state and gave prominence to the surface of skin; some cases had hemorrhage in the poxes and showed dark purplish red.Poxes on gastric mucosa showed ashen.Cytoplasmic inclusion body could be all observed in epithelial cells of the poxes and macrphages of lymph node,lung and spleen.[Conclusion] Poxes on skin,lung and the surface of gastric mucosa as well as cytoplasmic inclusion body in the epithelial cells of pox and the macrphages of lymphoid organs were the especial pathochanges of goat pox,which could be taken as the proof of goat pox's clinic diagnisis.
基金Supported by the National Natural Science Foundation of China(31001056)the National Natural Science Foundation of China(31101802)+1 种基金Major Program for New Transgenic Organism Verities Breeding of Ministry of Agriculture of China(2009ZX08008-010B)Key Science and Technology Foundation of Gansu Province(092NKDA032)~~
文摘[Objective] The study aimed to clone RPO30 gene from Sheeppox virus (SPPV) and predict the structure and function of the sequence. [Method] RPO30 gene of SPPV was cloned with PCR, linked into pMD18-T simple vector and then transformed into E. coli DH5a. In blue-white screen, the white colonies were selected to prepare plasmids. The positive plasmids were selected by double digestion and PCR, and then sequenced. Finally, the structure and function of the sequence obtained were predicted by bioinformatics methods. [Results] The RPO30 gene was successfully obtained; its ORF was 585 bp, encoding 193 amino acids and containing a recognition site for Hind III. Moreover, the SPPV RPO30 gene shared different homologies with the RPO30 gene sequences of other pox virus strains from GenBank database. Further analysis by biological software showed that in RPO30 protein, amino acids 4-12, 18-26, 50- 61, 68- 92 and 176-190 had a high possibility to form the active center, and acting to these regions was likely to inactivate the enzyme encoded by the sequence, thus to inhibit viral replication efficiently. [Conclusion] This study will lay foundation for further study on the structure and function of RPO30.
基金Supported by the National Natural Science Foundation of China(10971001) Supported by Henan Science and Technology Department(082102140025, 092300410228)
文摘Differential susceptibility SIR epidemic models with time delay and pulse vaccination is studied in this paper. We show that there exists an infection-free periodic solution by using the comparison method, which is globally attractive provided that R1 〈 1, and that R2 〉 1 implies the disease is permanent, which means that after some period of time the disease will become endemic.
基金This work was partially supported by Grant-in-Aid for Scientific Research (B) (18380038)
文摘Tea is a perennial and evergreen plant. Cultivated tea trees provide a habitat for insect pests and their natural enemies. In Japan, granuloviruses (GVs) have successfully controlled two of the most important pests of tea, Adoxophyes honmai and Homona magnanima (Tortricidae: Lepidoptera). The GVs are produced in vivo and a single application sustains pesticidal efficacy throughout a year, which encompasses 4 to 5 discrete generations of both species. A. honmai and H. magnanima also have various natural enemies, especially hymenopteran parasitoids. Such resident natural enemies also play a role in reducing the pest density in virus-controlled fields, but the effect of virus infection on parasitoids sharing the same host larva has not been well studied. Survival of one of the major parasitoids of A. honmai, Ascogaster reticulata (Braconidae: Hymenoptera), is reduced by virus infection of the host. Viruses, including GV and entomopoxvirus (EPV), and certain koinobiont endoparasitoids, including A. reticulata, are both known to regulate host endocrinology. However, the GV and EPV have distinct host regulation mechanisms, and consequently have different impacts on the survival of A. retuculata, when A. reticulata parasitizes a host that is infected with either GV or EPV. These additional effects on host regulation displayed by both viruses and parasitoids affect the outcome of virus-parasitoid interactions.
文摘In the present study,the partial gene sequences of P32 protein,an immunogenic envelope protein of Capripoxviruses (CaPV),were analyzed to assess the genetic relationship among sheeppox and goatpox virus isolates,and restriction enzyme specific PCR-RFLP was developed to differentiate CaPV strains.A total of six goatpox virus (GTPV) and nine sheeppox virus (SPPV) isolates of Indian origin were included in the sequence analysis of the attachment gene.The sequence analysis revealed a high degree of sequence identity among all the Indian SPPV and GTPV isolates at both nucleotide and amino acid levels.Phylogenetic analysis showed three distinct clusters of SPPV,GTPV and Lumpy skin disease virus (LSDV) isolates.Further,multiple sequence alignment revealed a unique change at G120A in all GTPV isolates resulting in the formation of Dra I restriction site in lieu of EcoR I,which is present in SPPV isolates studied.This change was unique and exploited to develop restriction enzyme specific PCR-RFLP for detection and differentiation of SPPV and GTPV strains.The optimized PCR-RFLP was validated using a total of fourteen (n=14) cell culture isolates and twenty two (n=22) known clinical samples of CaPV.The Restriction Enzyme specific PCR-RFLP to differentiate both species will allow a rapid differential diagnosis during CaPV outbreaks particularly in mixed flocks of sheep and goats and could be an adjunct/supportive tool for complete gene or virus genome sequencing methods.
文摘To evaluate maternal hepatitis B virus (HBV) DNA as risk for perinatal HBV infection among infants of HBV-infected women in California. METHODSRetrospective analysis among infants born to hepatitis B surface antigen (HBsAg)-positive mothers who received post vaccination serologic testing (PVST) between 2005 and 2011 in California. Demographic information was collected from the California Department of Public Health Perinatal Hepatitis B Program databaseand matched to birth certificate records. HBV DNA level and hepatitis B e antigen (HBeAg) status were obtained from three large commercial laboratories in California and provider records if available and matched to mother infant pairs. Univariate analysis compared infected and uninfected infants. Multivariate analysis was restricted to infected infants and controls with complete maternal HBV DNA results using a predefined high HBV DNA level of > 2 × 10<sup>7</sup> IU/mL, a 5:1 ratio of cases to controls and a two-sided confidence level of 95%. RESULTSA total of 17687 infants were born to HBsAg positive mothers in California between Jan 1 2005 and Dec 31, 2011. Among 11473 infants with PVST, only 125 (1.1%) were found to be HBV infected. Among these infected infants, lapses in Advisory Committee on Immunization Practices recommended post exposure prophylaxis (PEP) occurred in only 9 infants. However, PEP errors were not significantly different between infected and uninfected infants. Among the 347 uninfected and infected infants who had maternal HBeAg and HBV DNA level, case-control analysis found HBeAg positivity (70.4% vs 28.9%, OR = 46.76, 95%CI: 6.05-361.32, P < 0.001) and a maternal HBV DNA level ≥ 2 × 10<sup>7</sup> IU/mL (92.6% vs 18.5%, OR = 54.5, 95%CI: 12.22-247.55, P < 0.001) were associated with perinatal HBV infection. In multivariate logistic regression, maternal HBV DNA level ≥ 2 × 10<sup>7</sup> IU/mL was the only significant independent predictor of perinatal HBV infection. CONCLUSIONIn California, transmission is low and most infected infants receive appropriate PEP and vaccination. Maternal HBV DNA ≥ 2 × 10<sup>7</sup> IU/mL is associated with high risk of perinatal infection.
文摘Dose-dependent IgY antibody response to different amounts oforthopox virus (OPV) antigen has been studied in immunized chickens for two different OPV strains (vaccinia virus, 7.0× 10^6 PFU and cowpox virus, 9.2× 10^7PFU). The antibody responses to different immunizations were tested and compared by indirect immunofluorescence antibody test. Our results, together with the literature, show that the antigen dose used for immunization plays an important role for the production of specific Abs. An increase in antigen concentration may achieve higher Ab titers but, dependent on the immunogenicity of OPV antigen, it can also lead to an immune depression. However, in this study we found that OPV played a positive correlation between antigen concentration and Ab-titer.
文摘In Egypt,protection of cattle against lumpy skin disease (LSD) was carried out using a sheep poxvirus (Kenyan strain) vaccination strategy.In the present study 15 skin nodules from LSD suspected cows and 5 scab samples from sheep pox (SP) suspected sheep were collected.Hyperimmune rabbit sera to Lumpy skin disease virus (LSDV)/Ismailyia88 strain and sheep pox virus (SPV)/ Kenyan vaccinal strain were prepared.The causative agent in the collected samples was identified using immunoflourescence (IF) and immunoperoxidase techniques.Of the 15 skin nodules suspected of LSD,10 showed a positive reaction and 3 out of 5 skin scabs suspected of sheeppox were found to be positive.An antigenic correlation between field skin isolate of LSDV,tissue culture adapted LSDV/Ismailyia88 strain,field skin isolate of SPV and SPV/Kenyan vaccinal strain was studied using prepared hyperimmune sera.Also,nucleotide sequence of the PCR amplified attachment gene fragments of field skin isolate of LSDV,tissue culture adapted LSDV/Ismailyia88 strain,field skin isolate of SPV and SPV /Kenyan vaccinal strain were compared.The results revealed that the four used viruses were antigenically identical.Sequence analysis indicated that field skin LSDV isolate is more related to tissue culture adapted LSDV/Ismailyia88 strain than to vaccinal SPV/ Kenyan strain and the skin isolate of SPV is more closely related to field skin isolate of LSDV than to SPV/Kenyan vaccinal strain.Thus,further study should be applied on the advantage of a LSD vaccine prepared from LSDV in protection of cattle against LSD compared to the commonly used sheep pox vaccine.