Soroprevalência de Anaplasma marginale em bovinos na mesorregião Norte Fluminense

Pesquisa Veterinária Brasileira

José Carlos P. Souza²  Cleber O. Soares²  Carlos L. Massard²  Alessandra Scofield¹  Adivaldo H. Fonseca² 

[1],Universidade Federal Rural do Rio de JaneiroSeropédica RJ

关键词: Seroepidemiology;    Anaplasma marginale;    bovine anaplasmosis;    enzyme immunoassay;    "Norte Fluminense" mesoregion;    Brazil;    Soroepidemiologia;    Anaplasma marginale;    anaplasmose bovina;    ensaio imunoenzimático;    mesorregião Norte Fluminense;    Brasil;   

DOI  :  10.1590/S0100-736X2000000300002

来源: SciELO

【 摘 要 】

Serumprevalence of antibodies against Anaplasma marginale was evaluated by the indirect Enzyme-Linked Immunosorbent Assay (ELISA). Sera samples from 532 bovines from nine municipalities in the "Norte Fluminense" mesoregion, Rio de Janeiro state, were analysed. The results showed that 485 (91.16%) were positive, of which 55.45% had a titre of 1:500, 22.18% of 1:1000, 6.77% of 1:2000, 3.01% of 1:4000, 1.50% of 1:8000, 0.94% of 1:16000, 0.75% of 1:32000, 0.56% of 1:64000, and 8.84% were negative. The prevalence analysis was done within three age groups: 1 to 3 years (n= 110), 3 to 6 years (n= 241) and > 6 years (n= 181), of which 91.82%, 92.95% and 88.95% were positive, respectively. According to the breed, 91.22% of beef cattle (n= 444) and 90.91% of dairy cattle (n= 88), were positive. Regarding the sex, 91.35% of the females (n= 497) and 88.57% of the males (n= 35), were positive. There were no significant differences between the age groups, breeding types and the sexes (P > 0.05); and between the prevalence in the municipalities (P > 0.000). The seroprevalence showed that the region has to be considered enzootically stable, and the infection by A. marginale in this area is high and homogeneous.

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