The comparative morphology of three equine habronematid nematodes: SEM observations

Naem, Soraya

doi:10.1007/s00436-007-0637-1

Cited by 16 publications

(9 citation statements)

References 31 publications

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“…The types of This disease are consisted of: Gastric, cutaneous (''summer sores'') and ophthalmic habronemiasis (Naem 2007;Yarmut et al 2008;Rebhun 1996). In cutaneous habronemiasis, Skin lesions are ulcerated, granulomatous masses that bleed easily appear.…”

Section: Discussionmentioning

confidence: 99%

“…It is caused by aberrant intradermal migration by third-stage larvae (juveniles) of equine spiruroid stomach worms, Habronema musca, Habronema microstoma, and Draschia megastoma. The adult forms of these parasites live in the equine stomach and their larvae as well as eggs are passed in the host faeces but are usually not observed in standard faecal flotation examination (Onmaz et al 2013;Naem 2007;Pusterla et al 2003;CollobertLaugier et al 2000). The aim of study was to describe clinico histopathological manifestations of cutaneous and gastric habronemiasis in horse.…”

Section: Introductionmentioning

confidence: 99%

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Histopathological features of cutaneous and gastric habronemiasis in horse

Amininajafi

Mehrara²,

Hosseini

et al. 2014

J Parasit Dis

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The aim of study was to describe clinico histopathological manifestations of cutaneous and gastric habronemiasis in horse. The adult worms live on the wall of the stomach and cutaneous of the host without internal migration. A 5 year old 700 kg warm-blood, cross gelding was referred to the Tehran School of Veterinary Medicine, Veterinary Teaching Hospital. The horse presented skin lesions around. In our survey, several raised granulomatous nodules with a cystic space and parasites within the cysts were observed. Also gastric rupture at greater curvature due to abscess and perforation through the serosa causing diffused peritonitis and subsequent death. Eosinophils and other inflammatory cells were present in large numbers. Furthermore, cutaneous lesions were characterized by single or multiple ulcerated timorous masses with eosinophil epithelioid cell infiltration and scattered necrotic debris. Granulation tissue and neutrophils were observed along the ulcerated area. In this report a case of cutaneous and gastric habronemiasis in a horse in Iran is described with special attention to confirmation of the clinical diagnosis.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Histopathological features of cutaneous and gastric habronemiasis in horse

Amininajafi

Mehrara²,

Hosseini

et al. 2014

J Parasit Dis

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“…Draschia megastoma adults (7-13 mm long) are white and their head is separated from the rest of their body by a visible constriction. The pharynx is funnel-like, with two separated lateral vales; no teeth are present (7).…”

Section: Etiology and Life Cyclementioning

confidence: 99%

Habronematidosis in Equids: Current Status, Advances, Future Challenges

et al. 2020

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Over the past few decades, among equine parasitoses caused by gastrointestinal nematodes, habronematidosis has been discontinuously studied worldwide. Habronematidosis is a parasitic disease distributed all over the world. It is caused by Habronema microstoma, Habronema muscae, and Draschia megastoma (Spirurida, Habronematidae), and it is maintained in the environment by muscid flies which act as intermediate hosts. At larval and adult stages these species live in the stomach of domestic and wild equids. However, the larvae can also be found on the skin, causing lesions known as "summer sores", and occasionally on other body areas, such as ocular and genital mucosa (muco-cutaneous habronematidosis) and lung, liver, brain parenchyma. Depending on the parasite's developmental stage and localization site, clinical signs vary from mild to severe. Habronematidosis is responsible for significant economic losses, mostly when sport horses are affected, because their performances are impaired and the infection can be unaesthetic. We used three on-line databases for searching the articles on habronematidosis according to the selected inclusion criteria; a total of 250 contributions, published between 1911 and 2020 were analyzed. This review summarizes the key features of pathogenesis, epizootiology, diagnosis, treatment, and control of habronematidosis, and highlights the current knownledge about its geographical distribution and spread. Anthelmintic drugs are the most widely-used tools against habronematidosis; given the known risk of anthelmintic resistance in some nematodes affecting horses, this aspect should also be explored for habronematidosis. Dedicated research is essential to fill gaps of knowledge and increase the understanding of habronematidosis to maximize equine health, reduce economic losses and sanitary impact associated with this parasitic infection.

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“…Among the Habronema species, only H. muscae shows a morphological pattern similar to H. clarki, with well-developed trifurcated pseudolabia, while H. microstoma has simple trapezoid pseudolabia (NAEM, 2007). The characteristic pseudolabia and the slightly convex border of the dorsal and ventral lips are sufficient to differentiate H. clarki from H. muscae.…”

Section: Discussionmentioning

confidence: 98%

“…Contrary to the International Code of Zoological Nomenclature, the taxon used as the basis for the superfamily is not the oldest, but the most recognized species: Habronema muscae (Carter, 1861) Diesing, 1861 (CHABAUD, 2009). Oddly, although there are four valid species in the genus Habronema Diesing, 1861, which is the type genus of this group, only H. muscae and Habronema microstoma (Schneider, 1866) Ramson, 1911 have been properly studied regarding their biology (ANDERSON, 2000) and morphology (NAEM, 2007).…”

Section: Introductionmentioning

confidence: 99%

Detailed morphological description of Habronema clarki Foster & Chitwood, 1937, a nematode parasite of capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766) in Brazil

Hoppe

Tebaldi

Ferreira

2014

Rev. Bras. Parasitol. Vet.

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The genus Habronema has four valid species, of which only two are properly known. The present study aimed to describe in detail the morphology of Habronema clarki through optical and scanning electron microscopy analyses. Our results showed that the labial morphology of this parasite is closer to H. muscae than to H. microstoma. Even so, the characteristic pseudolabia and the slightly convex border of the dorsal and ventral lips are sufficient to distinguish these nematodes. Additional morphological data are presented, thus contributing to the knowledge on this little known nematode. In addition, this study provides new locality records for this species.Keywords: Nematoda, optical microscopy, scanning electron microscopy, labial morphology. ResumoO gênero Habronema tem quatro espécies válidas, das quais apenas duas são propriamente conhecidas. O presente estudo visa descrever em detalhes a morfologia de Habronema clarki por meio de microscopia eletrônica de varredura e de luz. Os resultados demonstram que a morfologia labial do parasita é mais próxima de H. muscae que de H. microstoma. Ainda assim, os pseudolábios característicos e a borda discretamente convexa dos lábios dorsal e ventral são suficientes para se diferenciar esses nematódeos. Dados morfológicos adicionais são apresentados, contribuindo para o conhecimento deste nematódeo pouco conhecido. Em adição, este estudo representa um novo registro de localidade para a espécie.Palavras-chave: Nematoda, microscopia óptica, microscopia eletrônica de varredura, morfologia labial.

show abstract

The comparative morphology of three equine habronematid nematodes: SEM observations

Cited by 16 publications

References 31 publications

Histopathological features of cutaneous and gastric habronemiasis in horse

Histopathological features of cutaneous and gastric habronemiasis in horse

Habronematidosis in Equids: Current Status, Advances, Future Challenges

Detailed morphological description of Habronema clarki Foster & Chitwood, 1937, a nematode parasite of capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766) in Brazil

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