The nonlocal symmetry is derived for an equation combining the modified Calogero–Bogoyavlenskii–Schiff equation with its negative-order form from the truncated Painlevéexpansion method.The nonlocal symmetries a...The nonlocal symmetry is derived for an equation combining the modified Calogero–Bogoyavlenskii–Schiff equation with its negative-order form from the truncated Painlevéexpansion method.The nonlocal symmetries are localized to the Lie point symmetry by introducing new auxiliary dependent variables.The finite symmetry transformation and the Lie point symmetry for the prolonged system are solved directly.Many new interaction solutions among soliton and other types of interaction solutions for the modified Calogero–Bogoyavlenskii–Schiff equation with its negative-order form can be obtained from the consistent condition of the consistent tanh expansion method by selecting the proper arbitrary constants.展开更多
Introduction:Severe fever with thrombocytopenia syndrome(SFTS)is a tick-borne viral disease caused by the Dabie bandavirus(DBV),which is traditionally endemic in rural agricultural and tea plantation areas.The expansi...Introduction:Severe fever with thrombocytopenia syndrome(SFTS)is a tick-borne viral disease caused by the Dabie bandavirus(DBV),which is traditionally endemic in rural agricultural and tea plantation areas.The expansion of suitable tick habitats into urban green spaces raises concerns regarding urban transmission.Methods:In June 2025,two confirmed cases of SFTS were reported in an urban district of Nanjing,China.A Centers for Disease Control-led field investigation was conducted,including epidemiological investigations,environmental assessments,tick monitoring,and molecular analyses.Results:Both cases involved elderly urban residents with no rural exposure or animal contact.Case 1 developed symptoms on June 11,recovered,and was discharged on June 19.Case 2 developed symptoms on June 17 and fully recovered by June 28.Neither patient experienced severe complications.At Case 2’s location,tick density was 4.0 ticks/100 m·h;83.3%(10/12)tested positive for DBV,whereas at Case 1’s site,tick density was 1.25 ticks/100 m·h and all ticks tested negative.Sequencing of the L,M,and S segments showed 99.4%–100%nucleotide similarity between patient-and tick-derived strains,indicating locally acquired infection and sporadic natural DBV foci in urban environments.Conclusion:The high DBV-positive rate in ticks from urban green spaces provides strong evidence of localized viral circulation,indicating the potential for SFTS transmission in urban environments.Our findings provide scientific support for targeted urban tick surveillance,vector control measures,and increased clinical awareness.展开更多
基金supported by National Natural Science Foundation of China(No.11471215)Shanghai Natural Science Foundation(No.18ZR142600)。
文摘The nonlocal symmetry is derived for an equation combining the modified Calogero–Bogoyavlenskii–Schiff equation with its negative-order form from the truncated Painlevéexpansion method.The nonlocal symmetries are localized to the Lie point symmetry by introducing new auxiliary dependent variables.The finite symmetry transformation and the Lie point symmetry for the prolonged system are solved directly.Many new interaction solutions among soliton and other types of interaction solutions for the modified Calogero–Bogoyavlenskii–Schiff equation with its negative-order form can be obtained from the consistent condition of the consistent tanh expansion method by selecting the proper arbitrary constants.
基金Supported by the Research and Innovation Project of the Nanjing Institute of Public Health,Nanjing Medical University(NCX2304).
文摘Introduction:Severe fever with thrombocytopenia syndrome(SFTS)is a tick-borne viral disease caused by the Dabie bandavirus(DBV),which is traditionally endemic in rural agricultural and tea plantation areas.The expansion of suitable tick habitats into urban green spaces raises concerns regarding urban transmission.Methods:In June 2025,two confirmed cases of SFTS were reported in an urban district of Nanjing,China.A Centers for Disease Control-led field investigation was conducted,including epidemiological investigations,environmental assessments,tick monitoring,and molecular analyses.Results:Both cases involved elderly urban residents with no rural exposure or animal contact.Case 1 developed symptoms on June 11,recovered,and was discharged on June 19.Case 2 developed symptoms on June 17 and fully recovered by June 28.Neither patient experienced severe complications.At Case 2’s location,tick density was 4.0 ticks/100 m·h;83.3%(10/12)tested positive for DBV,whereas at Case 1’s site,tick density was 1.25 ticks/100 m·h and all ticks tested negative.Sequencing of the L,M,and S segments showed 99.4%–100%nucleotide similarity between patient-and tick-derived strains,indicating locally acquired infection and sporadic natural DBV foci in urban environments.Conclusion:The high DBV-positive rate in ticks from urban green spaces provides strong evidence of localized viral circulation,indicating the potential for SFTS transmission in urban environments.Our findings provide scientific support for targeted urban tick surveillance,vector control measures,and increased clinical awareness.
