First report of Chorioptes texanus (Acari: Psoroptidae) in Argentina

IF 1.6 Q3 PARASITOLOGY

Veterinary parasitology, regional studies and reports Pub Date : 2026-01-01 Epub Date: 2025-12-02 DOI:10.1016/j.vprsr.2025.101393

Sebastián Muchiut , Oscar Anziani

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Abstract

In Argentina it has historically been assumed that Chorioptes bovis is the only species involved in clinical cases of bovine chorioptic mange. The aim of this communication is to present the first formal report based on morphometric studies of C. texanus in Argentina. Mange mites were collected through skin scrapings of areas with superficial dermatitis on adult dairy cows from three dairy farms located in Santa Fe, Entre Ríos and Córdoba provinces (Argentina). Clinical lesions were characterized by dermatitis located at the base of the tail and ischiorectal fossa, pruritus with hyperkeratosis and crust formation. The taxonomic determination was based on morphological characters. For species-level identification, adult male specimens were isolated from each sample and measurements were taken by using an image analysis software. Based on characteristics such as body length (243–275 μm), the bases of opisthosomal setae h2 and h3 positioned close to each other, and seta ps2 (65–73 μm) being longer than ps1 (28–30 μm). On tarsus III, the fIII seta was bifurcate. Body length was 1.4 times longer than setae cp. A total of 34 male specimens were identified, all corresponding to C. texanus. The morphometric results of the present study closely align with those documents in the literature and constitute the first diagnoses of C. texanus parasitizing cattle in Argentina.

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文章标题阿根廷德克萨斯绒螯蟹首次报道（蜱螨亚纲：绒螯蟹科）

在阿根廷，历史上一直认为牛绒毛膜虫是牛绒毛膜病临床病例中唯一涉及的物种。本通讯的目的是提出第一份正式报告，该报告是基于在阿根廷的C. texanus的形态计量学研究。通过对位于阿根廷圣达菲、恩特雷Ríos和Córdoba省的三个奶牛场的成年奶牛的浅表性皮炎部位进行皮肤刮擦收集了疥螨。临床病变的特点是皮炎位于尾部底部和坐骨直肠窝，瘙痒与角化过度和结皮形成。根据形态特征进行分类鉴定。为了在物种水平上进行鉴定，从每个样本中分离出成年雄性标本，并使用图像分析软件进行测量。从体长（243 ~ 275 μm）等特征来看，opisthosomal刚毛h2和h3的碱基位置接近，且刚毛ps2 （65 ~ 73 μm）比ps1 （28 ~ 30 μm）长。在跗关节III上，fIII节是分叉的。体长是刚毛长度的1.4倍，共鉴定出34个雄性标本，均为毛蚶。本研究的形态计量学结果与文献中的那些文件密切一致，并构成了阿根廷牛寄生C. texanus的首次诊断。

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来源期刊

Veterinary parasitology, regional studies and reports Multiple-

CiteScore

2.90

自引率

7.10%

发文量

126

审稿时长

97 days

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).