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Home / Equine Research Bank / Vet Parasitol / Prevalence and macro- and microscopic lesions produced by Ga...
Veterinary parasitology2002; 102(3); 261-266; doi: 10.1016/s0304-4017(01)00536-2

Prevalence and macro- and microscopic lesions produced by Gasterophilus nasalis (Diptera: Oestridae) in the Botucatu Region, SP, Brazil.

Abstract: The objective of the present study was to investigate the prevalence of Gasterophilus nasalis larvae in Botucatu, the central west region of São Paulo State, Brazil, and to describe the lesions caused by the parasite. The climate of Botucatu is warm and rainy during the months of December through March and cool and dry during the months of May through August. The prevalence of G. nasalis was 16.84%, and the period of peak infestation corresponded to the months of cold and dry weather. The lesions detected at the sites of larval attachment were examined macro- and microscopically. Erosions and ulcerations of the gastric mucosa and proximal duodenum were the major macroscopic lesions detected. Microscopically, the lesion spectrum ranged from mild inflammatory reactions to extensive necrosis and ulceration.
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Publication Date: 2002-01-05 PubMed ID: 11777606DOI: 10.1016/s0304-4017(01)00536-2Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The researchers conducted a study aimed at exploring the occurrence of the Gasterophilus nasalis larvae parasite in the central west region of São Paulo State, Brazil, particularly in Botucatu, and examining the damage caused by these parasites.

Research Goals

  • The study sought to identify how common (prevalence) the Gasterophilus nasalis larvae parasite is in Botucatu.
  • The researchers also aimed to describe what kind of lesions or injuries this parasite is causing. They did this by observing both macroscopically (with the naked eye) and microscopically (with a microscope).

Regional Climate’s Role

  • The climate of Botucatu, where the study was conducted, varies seasonally. It is typically warm and rainy during the months of December to March, humanely classified as the rainy season, and cool and dry during the months of May to August recognized as the dry season.
  • The paper’s findings suggest that the prevalence of G. nasalis parasites varies alongside these seasonal changes. The population of this parasite peaks during the months of cold and dry weather, rather than during the warm, rainy season.

Prevalence Findings

  • A total prevalence rate of 16.84% was found for G. nasalis – meaning that just under 17% of a given population in the region was found to carry this parasite.
  • The study does not mention the exact population or species that this prevalence rate applies to, but it is presumably referencing local animal populations, as G. nasalis is known to primarily affect horses.

Lesion Observations

  • Various types of damage were detected at the sites where the larvae attach themselves – with macroscopic lesions primarily being in the form of erosions and ulcerations of the gastric mucosa (lining of the stomach) and proximal duodenum (the first part of the small intestine).
  • On a microscopic level, the level of damage varied from minor inflammatory reactions (redness, swelling), to massive tissue death (necrosis) and ulceration (deep sores).
  • The depth of these lesions suggests that this parasite can cause significant health problems for the affected animals.

Cite This Article

APA
Sequeira JL, Tostes RA, Oliveira-Sequeira TC. (2002). Prevalence and macro- and microscopic lesions produced by Gasterophilus nasalis (Diptera: Oestridae) in the Botucatu Region, SP, Brazil. Vet Parasitol, 102(3), 261-266. https://doi.org/10.1016/s0304-4017(01)00536-2

Publication

Veterinary parasitology
ISSN: 0304-4017
NlmUniqueID: 7602745
Country: Netherlands
Language: English
Volume: 102
Issue: 3
Pages: 261-266

Researcher Affiliations

Sequeira, J L
  • Departamento de Clínica Veterinária-Anatomia Patológica Veterinária, Faculdade de Medicina Veterinária e Zootecnia, Unesp, Botucatu, SP 18618-000, Brazil. sequeira@fmvz.unesp.br
Tostes, R A
    Oliveira-Sequeira, T C

      MeSH Terms

      • Animals
      • Brazil / epidemiology
      • Climate
      • Digestive System / parasitology
      • Digestive System / pathology
      • Diptera / growth & development
      • Diptera / physiology
      • Duodenum / parasitology
      • Duodenum / pathology
      • Female
      • Gastric Mucosa / parasitology
      • Gastric Mucosa / pathology
      • Horse Diseases / epidemiology
      • Horse Diseases / parasitology
      • Horse Diseases / pathology
      • Horses
      • Larva
      • Male
      • Parasitic Diseases, Animal / epidemiology
      • Parasitic Diseases, Animal / pathology
      • Prevalence
      • Seasons

      Citations

      This article has been cited 11 times.
      1. Hu D, Tang Y, Wang C, Qi Y, Ente M, Li X, Zhang D, Li K, Chu H. The Role of Intestinal Microbial Metabolites in the Immunity of Equine Animals Infected With Horse Botflies.. Front Vet Sci 2022;9:832062.
        doi: 10.3389/fvets.2022.832062pubmed: 35812868google scholar: lookup
      2. Hu D, Yang J, Qi Y, Li B, Li K, Mok KM. Metagenomic Analysis of Fecal Archaea, Bacteria, Eukaryota, and Virus in Przewalski's Horses Following Anthelmintic Treatment.. Front Vet Sci 2021;8:708512.
        doi: 10.3389/fvets.2021.708512pubmed: 34490397google scholar: lookup
      3. Huang H, Zhang K, Zhang B, Liu S, Chu H, Qi Y, Zhang D, Li K. Analysis on the relationship between winter precipitation and the annual variation of horse stomach fly community in arid desert steppe, Northwest China (2007-2019).. Integr Zool 2022 Jan;17(1):128-138.
        doi: 10.1111/1749-4877.12578pubmed: 34254452google scholar: lookup
      4. Hu D, Chao Y, Zhang B, Wang C, Qi Y, Ente M, Zhang D, Li K, Mok KM. Effects of Gasterophilus pecorum infestation on the intestinal microbiota of the rewilded Przewalski's horses in China.. PLoS One 2021;16(5):e0251512.
        doi: 10.1371/journal.pone.0251512pubmed: 33974667google scholar: lookup
      5. Li XY, Pape T, Zhang D. Taxonomic review of Gasterophilus (Oestridae, Gasterophilinae) of the world, with updated nomenclature, keys, biological notes, and distributions.. Zookeys 2019;891:119-156.
        doi: 10.3897/zookeys.891.38560pubmed: 31802974google scholar: lookup
      6. Li XY, Pape T, Zhang D. Gasterophilus flavipes (Oestridae: Gasterophilinae): A horse stomach bot fly brought back from oblivion with morphological and molecular evidence.. PLoS One 2019;14(8):e0220820.
        doi: 10.1371/journal.pone.0220820pubmed: 31404100google scholar: lookup
      7. Zhang B, Huang H, Wang H, Zhang D, Chu H, Ma X, Ge Y, Ente M, Li K. Genetic diversity of common Gasterophilus spp. from distinct habitats in China.. Parasit Vectors 2018 Aug 22;11(1):474.
        doi: 10.1186/s13071-018-3042-ypubmed: 30134994google scholar: lookup
      8. Gao DZ, Liu GH, Song HQ, Wang GL, Wang CR, Zhu XQ. The complete mitochondrial genome of Gasterophilus intestinalis, the first representative of the family Gasterophilidae.. Parasitol Res 2016 Jul;115(7):2573-9.
        doi: 10.1007/s00436-016-5002-9pubmed: 26987644google scholar: lookup
      9. Liu SH, Hu DF, Li K. Oviposition site selection by Gasterophilus pecorum (Diptera: Gasterophilidae) in its habitat in Kalamaili Nature Reserve, Xinjiang, China.. Parasite 2015;22:34.
        doi: 10.1051/parasite/2015034pubmed: 26621549google scholar: lookup
      10. Pilo C, Altea A, Scala A. Gasterophilosis in horses in Sardinia (Italy): effect of meteorological variables on adult egg-laying activity and presence of larvae in the digestive tract, and update of species.. Parasitol Res 2015 May;114(5):1693-702.
        doi: 10.1007/s00436-015-4352-zpubmed: 25663068google scholar: lookup
      11. Getachew AM, Innocent G, Trawford AF, Reid SW, Love S. Gasterophilosis: a major cause of rectal prolapse in working donkeys in Ethiopia.. Trop Anim Health Prod 2012 Apr;44(4):757-62.
        doi: 10.1007/s11250-011-9961-7pubmed: 21870062google scholar: lookup
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