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Vector borne and zoonotic diseases (Larchmont, N.Y.)2003; 3(1); 3-9; doi: 10.1089/153036603765627406

Serologic survey of domestic animals for zoonotic arbovirus infections in the Lacandón Forest region of Chiapas, Mexico.

Abstract: A serologic survey in domestic animals (birds and mammals) was conducted in four communities located in the Lacandón Forest region of northeastern Chiapas, Mexico, during June 29 to July 1, 2001, with the objective to identify zoonotic arboviruses circulating in this area. We collected 202 serum samples from healthy domestic chickens, geese, ducks, turkeys, horses and cattle. The samples were tested by plaque-reduction neutralization test for antibodies to selected mosquito-borne flaviviruses (family Flaviviridae), including St. Louis encephalitis (SLE), Rocio (ROC), Ilheus (ILH), Bussuquara (BSQ), and West Nile (WN) viruses, and selected alphaviruses (family Togaviridae), including Western equine encephalitis (WEE), Eastern equine encephalomyelitis (EEE), and Venezuelan equine encephalitis (VEE) viruses. Neutralizing antibodies to SLE virus were detected in two (8%) of 26 turkeys, 15 (23%) of 66 cattle, and three (60%) of five horses. Antibodies to VEE virus were detected in 29 (45%) of 65 cattle. Because some of these animals were as young as 2 months old, we demonstrated recent activity of these two viruses. Sub-typing of the VEE antibody responses indicated that the etiologic agents of these infections belonged to the IE variety of VEE, which has been reported from other regions of Chiapas. WN virus-neutralizing antibodies were detected in a single cattle specimen (PRNT(90) = 1:80) that also circulated SLE virus-neutralizing antibodies (PRNT(90) = 1:20), suggesting that WN virus may have been introduced into the region. We also detected weak neutralizing activity to BSQ virus in four cattle and a chicken specimen, suggesting the presence of this or a closely related virus in Mexico. There was no evidence for transmission of the other viruses (ROC, ILH, EEE, WEE) in the study area.
Publication Date: 2003-06-14 PubMed ID: 12804375DOI: 10.1089/153036603765627406Google Scholar: Lookup
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  • Journal Article

Summary

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This study focuses on identifying and evaluating the prevalence of arboviruses in domestic animals in the Lacandón Forest region of Chiapas, Mexico, highlighting the active presence of St. Louis Encephalitis (SLE) and Venezuelan equine encephalitis (VEE) in livestock populations.

Research Conduct and Aim

  • The research was initiated with a serologic survey of domestic animal species, including birds and mammals, from four different communities in the Lacandón Forest region of Chiapas, Mexico. The survey aimed at identifying the presence of zoonotic arboviruses within the region.

Data Collection

  • The researchers collected a total of 202 serum samples from a range of animals including chickens, geese, ducks, turkeys, horses and cattle over the course of three days in 2001. The animals were all reported as healthy at the time of sampling.

Testing Methods

  • The collected samples were tested using a plaque-reduction neutralization test – a diagnostic method used to identify virus-specific antibodies by decreasing the number of plaque-forming units in a virus dilution.
  • Specifically, they tested for antibodies to a variety of flaviviruses (including St. Louis encephalitis, Rocio, Ilheus, Bussuquara, and West Nile) and alphaviruses (including Western equine encephalitis, Eastern equine encephalomyelitis, and Venezuelan equine encephalitis).

Findings and Conclusion

  • Neutralizing antibodies to the SLE virus were detected in turkeys, cattle, and horses, whereas antibodies for the VEE virus were primarily found in cattle.
  • Some of the subjects were as young as two months old, signifying recent activity of the said viruses.
  • The researchers successfully sub-typed the VEE antibody responses, highlighting that the pathogens responsible for these infections belonged to the IE variety of VEE, an outcome consistent with reports from other regions of Chiapas.
  • Furthermore, the research suggested the possible introduction of the West Nile virus into the region, based on the detected WN virus-neutralizing antibodies in a single cattle specimen.
  • However, the researchers didn’t find any presence of Rocio, Ilheus, Eastern equine encephalomyelitis and Western equine encephalitis viruses in the study area.
  • The presence of antibodies to Bussuquara (BSQ) virus was a minor outcome, suggesting the presence or proximity of this virus to the region.

Cite This Article

APA
Ulloa A, Langevin SA, Mendez-Sanchez JD, Arredondo-Jimenez JI, Raetz JL, Powers AM, Villarreal-Treviño C, Gubler DJ, Komar N. (2003). Serologic survey of domestic animals for zoonotic arbovirus infections in the Lacandón Forest region of Chiapas, Mexico. Vector Borne Zoonotic Dis, 3(1), 3-9. https://doi.org/10.1089/153036603765627406

Publication

ISSN: 1530-3667
NlmUniqueID: 100965525
Country: United States
Language: English
Volume: 3
Issue: 1
Pages: 3-9

Researcher Affiliations

Ulloa, Armando
  • Centro de Investigación de Paludismo, Tapachula, Chiapas, Mexico.
Langevin, Stanley A
    Mendez-Sanchez, J D
      Arredondo-Jimenez, Juan I
        Raetz, Janae L
          Powers, Ann M
            Villarreal-Treviño, C
              Gubler, Duane J
                Komar, Nicholas

                  MeSH Terms

                  • Animals
                  • Animals, Domestic / virology
                  • Arbovirus Infections / blood
                  • Arbovirus Infections / epidemiology
                  • Arbovirus Infections / veterinary
                  • Arboviruses / isolation & purification
                  • Cattle
                  • Culicidae / virology
                  • Data Collection
                  • Horses / virology
                  • Insect Vectors / virology
                  • Mexico / epidemiology
                  • Neutralization Tests
                  • Poultry / virology
                  • Zoonoses / epidemiology
                  • Zoonoses / virology

                  Citations

                  This article has been cited 15 times.
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