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Pathogens (Basel, Switzerland)2022; 11(6); 634; doi: 10.3390/pathogens11060634

Detection of Leishmania spp. in Chronic Dermatitis: Retrospective Study in Exposed Horse Populations.

Abstract: is a protozoan causing human zoonotic visceral leishmaniasis (ZVL) and visceral-cutaneous canine leishmaniosis (CanL) in the Mediterranean Basin. is able to infect a large number of wild and domestic species, including cats, dogs, and horses. Since the 1990s, clinical cases of equine leishmaniasis (EL), typically characterized by cutaneous forms, have been increasingly diagnosed worldwide. The aim of the present study was to evaluate the presence of clinical forms of EL in CanL-endemic areas in Italy, where exposure of equine populations was ascertained from recent serological surveys. For this purpose, formalin-fixed and paraffin-embedded skin biopsies of 47 horses presenting chronic dermatitis compatible with EL were retrospectively selected for the study and subjected to conventional and q-PCR. A singular positivity for was found; BLAST analysis of sequence amplicons revealed a 99-100% homology with sequences. The histological examination revealed a nodular lymphoplasmacytic and histiocytic infiltrate; immunohistochemistry showed rare macrophages containing numerous positive amastigotes. The present retrospective study reports, for the first time, a case of a cutaneous lesion by occurring in an Italian horse. Pathological and healthy skin samples should be investigated on a larger scale to provide information on the potential clinical impact of EL in the practice, and to define the role of horses in epidemiological ZVL and CanL scenarios.
Publication Date: 2022-05-31 PubMed ID: 35745488PubMed Central: PMC9227255DOI: 10.3390/pathogens11060634Google 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 research article is about a study on Leishmania spp. presence in horses in certain areas of Italy that are known to have canine leishmaniosis.

Research Objective

  • The primary objective of this research was to evaluate the existence of equine leishmaniasis, a skin disease in horses, in regions of Italy where visceral and cutaneous canine leishmaniosis is endemic.

Method

  • The researchers conducted a retrospective analysis of skin biopsies from 47 horses that were presented with chronic dermatitis symptoms similar to equine leishmaniasis.
  • The samples were formalin-fixed and paraffin-embedded prior to being checked using both convention and q-PCR techniques for the presence of Leishmania spp..

Findings

  • One of the horses under investigation was found to be singularly positive for Leishmania spp..
  • The researchers conducted a BLAST analysis using the observed sequence amplicons and discovered that they had 99-100% homology with known Leishmania sequences.
  • The histology of the positive specimen showed a nodular lymphoplasmacytic and histiocytic infiltrate, with positive amastigotes observed in rare macrophages.

Significance and Recommendations

  • This research study is the first to report a cutaneous lesion caused by Leishmania spp. in any Italian horse.
  • Given this finding, the researchers recommend that larger scale investigations should be done on both healthy and pathological skin samples to determine the exact clinical impact of equine leishmaniasis in Italy.
  • This information is essential when examining the role that horses may play in the epidemiological mapping of both zoonotic visceral leishmaniasis and canine leishmaniosis in the region.

Cite This Article

APA
Gazzonis AL, Morganti G, Porcellato I, Roccabianca P, Avallone G, Gavaudan S, Canonico C, Rigamonti G, Brachelente C, Veronesi F. (2022). Detection of Leishmania spp. in Chronic Dermatitis: Retrospective Study in Exposed Horse Populations. Pathogens, 11(6), 634. https://doi.org/10.3390/pathogens11060634

Publication

ISSN: 2076-0817
NlmUniqueID: 101596317
Country: Switzerland
Language: English
Volume: 11
Issue: 6
PII: 634

Researcher Affiliations

Gazzonis, Alessia Libera
  • Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy.
Morganti, Giulia
  • Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
Porcellato, Ilaria
  • Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
Roccabianca, Paola
  • Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy.
Avallone, Giancarlo
  • Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Bologna, Italy.
Gavaudan, Stefano
  • Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Via Varano 286, 60100 Ancona, Italy.
Canonico, Cristina
  • Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Via Varano 286, 60100 Ancona, Italy.
Rigamonti, Giulia
  • Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
Brachelente, Chiara
  • Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.
Veronesi, Fabrizia
  • Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy.

Conflict of Interest Statement

The authors declare no conflict of interest.

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Citations

This article has been cited 1 times.
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