Zoonotic onchocerciasis

Ishizawa, Hisato; Kato, Shigeharu; Nishimura, Hirotake; TANAKA, Ryo; Fukuda, Masako; Takaoka, Hiroyuki; Tsutsumi, Yutaka

doi:10.1111/pin.12256

Cited by 8 publications

(9 citation statements)

References 8 publications

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“…Zoonotic onchocerciasis is a disease that affects animals and humans and is caused by various species of filarial nematode in the genus Onchocerca [1]. Most representatives of Onchocerca primarily infect cattle ( O .…”

Section: Introductionmentioning

confidence: 99%

A survey of Onchocerca fasciata infection in camels (Camelus bactrianus) with notes on morphology

Zhang

et al. 2019

PLoS ONE

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The goal of this study was to provide insight into the pathogenicity of Onchocerca fasciata in Camelus bactrianus to help control onchocerciasis. From November 2015 to January 2016, the prevalence and severity of onchocerciasis were recorded in 152 camels. Nodules containing Onchocerca were collected and observed. Adult parasites were extracted from the nodules and identified via light microscopy as well as by partial sequencing of the cytochrome oxidase subunit I (COI) gene. The sequences were examined and compared to similar sequences from other Onchocerca species. In total, 80.3% of camels were parasitized. The severity of infection varied, as camels harboured between one and fifteen nodules. The morphology and the cuticle differed in both sexes and displayed considerable variation in the thickness and structure of different body parts. Identification was further confirmed using molecular biology methods. This study provides a comprehensive morphological description of Onchocerca fasciata isolated from camels. The prevalence and intensity of infection (assessed via nodules) varied in the Bactrian camels. The structure of the cuticle was an important morphological feature for species differentiation in Onchocerca . Based on our data, the morphological assessment of O . fasciata represents a reliable method to characterize other Onchocerca species.

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Section: Introductionmentioning

confidence: 99%

A survey of Onchocerca fasciata infection in camels (Camelus bactrianus) with notes on morphology

Zhang

et al. 2019

PLoS ONE

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“…So far, 40 cases of Onchocerca species infecting animals have been described in humans worldwide, and all of them are within the Holarctic region [68,96,[118][119][120][121][122][123][124][125][126] (Figure 2). Among these cases in humans, O. lupi was the most prevalent species identified, followed by O. dewittei japonica and, to lesser extent, O. jakutensis, O. gutturosa, and O. cervicalis.…”

Section: Does Onchocerciasis Have a Zoonotic Character?mentioning

confidence: 99%

“…Since 2015, 12 reports of Onchocerca species infecting animals have been described in humans [68,96,118,119,[121][122][123][124][125][126]. Five of them were caused by O. lupi, which was found in the upper cervical spinal cord, conjunctiva, head, and forearm of five individuals diagnosed in the United States [121,122].…”

Section: Does Onchocerciasis Have a Zoonotic Character?mentioning

confidence: 99%

“…Five of them were caused by O. lupi, which was found in the upper cervical spinal cord, conjunctiva, head, and forearm of five individuals diagnosed in the United States [121,122]. Six more cases were reported in Japan, caused by O. dewittei japonica, which was isolated from the upper extremities in five individuals [123][124][125][126] or from the head of one person [96]. The most recent case was caused by O. jakutensis and was found in the vitreous body of the eye of a man from Poland [68].…”

Section: Does Onchocerciasis Have a Zoonotic Character?mentioning

confidence: 99%

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Zoonotic Implications of Onchocerca Species on Human Health

et al. 2020

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The genus Onchocerca includes several species associated with ungulates as hosts, although some have been identified in canids, felids, and humans. Onchocerca species have a wide geographical distribution, and the disease they produce, onchocerciasis, is generally seen in adult individuals because of its large prepatency period. In recent years, Onchocerca species infecting animals have been found as subcutaneous nodules or invading the ocular tissues of humans; the species involved are O. lupi, O. dewittei japonica, O. jakutensis, O. gutturosa, and O. cervicalis. These findings generally involve immature adult female worms, with no evidence of being fertile. However, a few cases with fertile O. lupi, O. dewittei japonica, and O. jakutensis worms have been identified recently in humans. These are relevant because they indicate that the parasite’s life cycle was completed in the new host—humans. In this work, we discuss the establishment of zoonotic Onchocerca infections in humans, and the possibility of these infections to produce symptoms similar to human onchocerciasis, such as dermatitis, ocular damage, and epilepsy. Zoonotic onchocerciasis is thought to be an emerging human parasitic disease, with the need to take measures such as One Health Strategies, in order to identify and control new cases in humans.

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“…Ali- Khan 1977Siegenthaler and Gubler 1965Azarova et al 1965Beaver et al 19741 4 19952 Takaoka et al 1996 4 1 3 1 10 Fukuda et al 2015;Takaoka et al 2001Takaoka et al , 2004Takaoka et al , 2005Uni et al 2010Uni et al , 2015aIshizawa et al 2015…”

Section: Zoonotic Onchocerciasismentioning

confidence: 99%

Zoonotic onchocerciasis in Japan: its causative <i>Onchocerca</i> species and vector black fly species

Takaoka

2015

Jap. J. Sanit. Zool.

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Information on zoonotic Onchocerca species and their black fly vectors is reviewed in relation to zoonotic onchocerciasis in Japan. Ten Onchocerca species are known in five kinds of ungulates in Japan: O. cervicalis in horse (Equus caballus); O. gibsoni, O. gutturosa, O. lienalis and O. sp. in cattle (Bos taurus); O. suzukii and O. skrjabini in Japanese serow (Capricornis crispus); O. eberhardi and O. skrjabini in Japanese deer (Cervus nippon); O. dewittei japonica and O. takaokai in wild boar (Sus scrotus). Onchocerca dewittei japonica was determined as a causative agent of all 10 human cases of zoonotic onchocerciasis that occurred in Japan. Simulium bidentatum was found to be a natural vector of O. dewittei japonica. Five other black fly species,

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Zoonotic onchocerciasis

Cited by 8 publications

References 8 publications

A survey of Onchocerca fasciata infection in camels (Camelus bactrianus) with notes on morphology

A survey of Onchocerca fasciata infection in camels (Camelus bactrianus) with notes on morphology

Zoonotic Implications of Onchocerca Species on Human Health

Zoonotic onchocerciasis in Japan: its causative <i>Onchocerca</i> species and vector black fly species

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