Guilherme G. Verocai , Rafael Antonio Nascimento Ramos , Hassan Hakimi , Brittany McHale , Sam Rivera
{"title":"Angiostrongylus cantonensis infection in a captive non-human primate (Varecia variegata) from the southeastern United States","authors":"Guilherme G. Verocai , Rafael Antonio Nascimento Ramos , Hassan Hakimi , Brittany McHale , Sam Rivera","doi":"10.1016/j.vprsr.2025.101337","DOIUrl":null,"url":null,"abstract":"<div><div><em>Angiostrongylus cantonensis</em> is a nematode of public health relevance that parasitizes lungs of rodents and can cause eosinophilic meningoencephalitis in humans. In this study we report a case of meningoencephalitis due to <em>A. cantonensis</em> infection in a geriatric, male black-and-white ruffed lemur (<em>Varecia variegata</em>) at a zoological facility in Atlanta, Georgia, southeastern United States of America. In December 2022, the animal presented with a history of acute hindlimb lameness that progressed to right hindlimb paresis and paralysis with loss of pain sensation. Radiographs revealed possible decrease in intervertebral joint space and spondylosis deformans at vertebrae C7-T1, T8-T10, and Cd 2–4. Euthanasia was elected due to the poor prognosis of the intervertebral disease. To investigate potential additional causes for the neurological manifestation exhibited by the animal, fragments of organs and tissues (i.e., eye, spinal cord, peripheral nerves, and brain) were fixed in 10 % neutral buffered formalin and processed and embedded in paraffin. Hematoxylin and eosin-stained slides were assessed for histological changes. Scrolls of the cerebellum were also processed for genomic DNA extraction followed by PCR and sequencing. The histological evaluation revealed lesions compatible with migration or presence of larval nematodes in nervous and ocular tissues. The parasitism by <em>A. cantonensis</em> was molecularly confirmed (GenBank: PQ783804) in cerebellum samples, supporting the evidence of the infection in a non-human primate kept in the Atlanta Zoo, Georgia. While the lemur had intervertebral disease that could have caused neurological manifestations, the presence of <em>A. cantonensis</em> could have contribute to the overall clinical presentation.</div></div>","PeriodicalId":23600,"journal":{"name":"Veterinary parasitology, regional studies and reports","volume":"64 ","pages":"Article 101337"},"PeriodicalIF":1.4000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Veterinary parasitology, regional studies and reports","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2405939025001455","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PARASITOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Angiostrongylus cantonensis is a nematode of public health relevance that parasitizes lungs of rodents and can cause eosinophilic meningoencephalitis in humans. In this study we report a case of meningoencephalitis due to A. cantonensis infection in a geriatric, male black-and-white ruffed lemur (Varecia variegata) at a zoological facility in Atlanta, Georgia, southeastern United States of America. In December 2022, the animal presented with a history of acute hindlimb lameness that progressed to right hindlimb paresis and paralysis with loss of pain sensation. Radiographs revealed possible decrease in intervertebral joint space and spondylosis deformans at vertebrae C7-T1, T8-T10, and Cd 2–4. Euthanasia was elected due to the poor prognosis of the intervertebral disease. To investigate potential additional causes for the neurological manifestation exhibited by the animal, fragments of organs and tissues (i.e., eye, spinal cord, peripheral nerves, and brain) were fixed in 10 % neutral buffered formalin and processed and embedded in paraffin. Hematoxylin and eosin-stained slides were assessed for histological changes. Scrolls of the cerebellum were also processed for genomic DNA extraction followed by PCR and sequencing. The histological evaluation revealed lesions compatible with migration or presence of larval nematodes in nervous and ocular tissues. The parasitism by A. cantonensis was molecularly confirmed (GenBank: PQ783804) in cerebellum samples, supporting the evidence of the infection in a non-human primate kept in the Atlanta Zoo, Georgia. While the lemur had intervertebral disease that could have caused neurological manifestations, the presence of A. cantonensis could have contribute to the overall clinical presentation.
期刊介绍:
Veterinary Parasitology: Regional Studies and Reports focuses on aspects of veterinary parasitology that are of regional concern, which is especially important in this era of climate change and the rapid and often unconstrained travel of people and animals. Relative to regions, this journal will accept papers of the highest quality dealing with all aspects of disease prevention, pathology, treatment, epidemiology, and control of parasites within the field of veterinary medicine. Also, case reports will be considered as they add to information related to local disease and its control; such papers must be concise and represent appropriate medical intervention. Papers on veterinary parasitology from wildlife species are acceptable, but only if they relate to the practice of veterinary medicine. Studies on vector-borne bacterial and viral agents are suitable, but only if the paper deals with vector transmission of these organisms to domesticated animals. Studies dealing with parasite control by means of natural products, both in vivo and in vitro, are more suited for one of the many journals that now specialize in papers of this type. However, due to the regional nature of much of this research, submissions may be considered based upon a case being made by the author(s) to the Editor. Circumstances relating to animal experimentation must meet the International Guiding Principles for Biomedical Research Involving Animals as issued by the Council for International Organizations of Medical Sciences (obtainable from: Executive Secretary C.I.O.M.S., c/o W.H.O., Via Appia, CH-1211 Geneva 27, Switzerland).