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Investigation of Ixodid ticks as vectors of Babesia caballi and Theileria equi (Protozoa: Apicomplexa) in central Italy.

Abstract: Babesia caballi and Theileria equi are widely recognized as causative agents of equine pirolasmosis (EP), an acute, sub-acute, and chronic disease of equines, with relevant economic impact on horse trade worldwide. Although several studies on EP prevalence from central Italy have been published, data on ticks responsible for its transmission are still lacking. In this study, we identified a potential competent vector, investigating main features of its ecology together with EP infection rates. A two-year sampling of questing ticks was carried out for the first time in Italy in an area known for high EP prevalence in horse sera, detecting the association between Rhipicephalus bursa and causative agents of EP. Most of the positive pools harbored a single infection (91.1%); mixed infections were also detected (8.9%). The infection rate for T. equi slightly decreased among years; B. caballi showed a lower, but increasing, infection rate. Tick phenology, climate variables, and peaks of EP prevalence indicated late May and second half of June as periods with the highest risk of new infections, especially during warm and dry days.
Publication Date: 2020-06-04 PubMed ID: 32492265DOI: 10.1111/jvec.12370Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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The research included in this article focuses on the identification of specific ticks as potential carriers of equine piroplasmosis, a debilitating disease affecting horses, in the central region of Italy.

Background and Importance of the Study

  • This research addresses the disease equine piroplasmosis (EP), which is detrimental to horses and holds economic significance through its impact on global trade. EP is known to be caused by the organisms Babesia caballi and Theileria equi.
  • Despite prior studies conducted on the prevalence of EP in central Italy, there has been a lack of research into the types of ticks that transmit the disease in this region. Identifying the vectors of this disease could facilitate more effective prevention and treatment strategies.

Study Methodology and Findings

  • Over a period of two years, the researchers conducted a collection and analysis of ticks located in a part of Italy notorious for high levels of EP prevalence. This represents the first study of its kind executed in Italy.
  • The tick species identified as the most likely vector of EP was Rhipicephalus bursa, as it consistently tested positive for the disease’s causative agents. These ticks were found mostly to carry a single infection (91.1%), although there were instances of mixed infections (8.9%).
  • The study also revealed a decrease in infection rates for T. equi over the time of the study, while a rising infection rate was observed for B. caballi.
  • The combination of tick seasons, local climate conditions, and periods of peak EP prevalence led the researchers to identify late May and the second half of June as the time periods in which there existed the greatest risk for new infections. This was especially the case during warm and dry weather conditions.

Implication of Findings

  • The findings of this research put forth valuable insight regarding the transmission patterns and potential risk factors of equine piroplasmosis in central Italy. This information could be used to devise appropriate preventive measures and management strategies against this disease in regions characterized by similar climatic and ecological features.
  • Moreover, imperatively, the identification of Rhipicephalus bursa as a competent vector for the disease may enable more targeted efforts in terms of tick control, mitigating disease spread, and improving the health outcomes for equine populations.

Cite This Article

APA
(2020). Investigation of Ixodid ticks as vectors of Babesia caballi and Theileria equi (Protozoa: Apicomplexa) in central Italy. J Vector Ecol, 45(1), 25-31. https://doi.org/10.1111/jvec.12370

Publication

ISSN: 1948-7134
NlmUniqueID: 9512496
Country: United States
Language: English
Volume: 45
Issue: 1
Pages: 25-31

Researcher Affiliations

MeSH Terms

  • Animals
  • Babesia / pathogenicity
  • Ecology
  • Horse Diseases / parasitology
  • Horse Diseases / transmission
  • Horses
  • Italy
  • Ixodidae / parasitology
  • Ixodidae / pathogenicity
  • Rhipicephalus / parasitology
  • Rhipicephalus / pathogenicity
  • Theileria / pathogenicity

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Citations

This article has been cited 5 times.
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