Toxocara and Neoascaris: studies on morphology development and migratory behaviour

Warren, Ed

doi:10.14264/uql.2014.433

Cited by 3 publications

(6 citation statements)

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“…In Asia, for example, T. cati was identifi ed both in members of the Pantherinae (Panthera tigris altaica, Gonzalez et al, 2007;Panthera pardus saxicolor,Youssefi et al, 2010, Ghaemi et al, 2011 and other Felinae (Prionailurus bengalensis euptilurus, Machida 1970;Yasuda et al, 1993Yasuda et al, , 1994; Prionailurus bengalensis iriomotensis, Yasuda et al, 1994;Felis chaus Sadighian 1970). The morphological measures of the T. cati specimens from the Kyrgyz Pallas' cat were comparable to values reported by Warren (1971), Vicente et al, (1997), Beldomenico et al, (2005), Radwan et al, (2009 and Gallas and Silveira (2013). The range and average number of denticles per lip counted in the present study was slightly lower than value reported in Baruš et al (1979) and Gallas and da Silveira (2013).…”

Section: Discussionsupporting

confidence: 87%

First record and molecular identification ofToxocara catiin a Pallas’ catOtocolobus manulfrom Kyrgyzstan

Heddergott

Uulu²,

Барашкова³

et al. 2016

Helminthologia

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SummaryIn the present paper, we the report the fi rst documented occurrence in the wild of Toxocara cati in the sole representative of the genus Otocolobus, the Pallas' cat. The identity of the parasite was confi rmed by morphological characteristics and by genetic barcoding of the second internal transcribed spacer of ribosomal DNA. The morphological measures of the T. cati specimens from the Kyrgyz Pallas' cat were comparable to values reported. We discuss the conservation implication of our fi nd.

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Section: Discussionsupporting

confidence: 87%

First record and molecular identification ofToxocara catiin a Pallas’ catOtocolobus manulfrom Kyrgyzstan

Heddergott

Uulu²,

Барашкова³

et al. 2016

Helminthologia

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“…Turning to other species of this genus that parasite Viverridae (Warren, 1970(Warren, , 1972, T. vincenti has a terminal hook similar to that of our specimens, but is distinguished by the presence of well developed cervical alae and of 2-4 denticles in the central zone of the indented lip edge. The characteristics of the uterus of our samples (1: 1 relation for the simple and double zones) rule out both T. sprenti (a relation slightly minor than 1: 2) and T. suricattae (1: 2 relation), although both do lack cervical alae.…”

Section: Discussionsupporting

confidence: 51%

New findings on the helminth fauna of the common european genet (Genetta genettaL.): first record ofToxocara genettaeWarren, 1972 (Ascarididae) in Europe

Alvarez

Iglesias

Bos

et al. 1990

Ann. Parasitol. Hum. Comp.

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SummaryThe helminth fauna of fifteen specimens of Genetta genetta L. (Carnivora : Viverridae) from Northwest Spain was studied. Two species were found: Taenia parva (80 %) and Toxocara genettae (73 %). This is the first report of T. genettae in Europe. The actual life cycle of Taenia parva in its european hosts seems to support the hypothesis that the migration of the genet from the african continent to Europe is quite recent.Résumé : Nouvelles découvertes sur l'helminthofaune de la genette commune européenne (Genetta genetta L.) : première notification pour Toxocara genettae Warren, 1972 (Ascarididae) en Europe.On a réalisé une étude sur l'helminthofaune de 15 spécimens de Genetta genetta L. (Carnivora: Viverridae) provenant du NordOuest de l'Espagne. On a trouvé deux espèces : Taenia parva (80 %) et Toxocara genettae (73 %). Ce travail constitue donc la première notification de T. genettae en Europe. Le cycle biolo gique de Taenia parva sur ses hôtes européens semble appuyer l'hypothèse que la migration de la genette du continent africain vers l'Europe est relativement récente.

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“…having 2 lateral columns extending posteriorly on either side of the intestine and anteriorly some distance beyond the oesophageal bulb". This again was different from the Y-system found in the T. pteropodis 3r'd-stage larva, which had no anterior lateral prolongations, and appears to be inconsistent with the description of the adult T_^ canis excretory system by Warren (1971a).…”

Section: Discussioncontrasting

confidence: 75%

“…He placed the genus Toxocara in the subfamily Ascaridinae, whose features he defined as follows: "Excretory system filamentar, excretory nucleus near commissure, excretory pore usually near nerve ring; ventriculus rectangular, ill-defined or absent; oesophageal gland nuclei enlarged; more than eight precloacal papillae; gubernaculum absent". Warren (1971a) reviewed in detail the genera Toxocara and Neoascaris, subjugating the latter into the former. After a detailed analysis of the literature and examination of available specimens, he concluded that only 11 species could be assigned with certainty to the genus Toxocara, as follows:…”

Section: Taxonomy and Descriptionmentioning

confidence: 99%

“…The major differential features were body length, very narrow cervical alae, short spicules of the male, caudal papillae of the male and egg size and appearance. Warren (1971a) Later, Sprent (1962) elaborated on these ideas, proposing a relationship between ascaridoid life-cycle evolution and the development of the excretory system. As more ascaridoid life-cycles were elucidated, his proposals for the evolution of ascaridoids became even more specific (Sprent, 1982;.…”

Section: Toxocara Pteropodismentioning

confidence: 99%

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Toxocara pteropodis Baylis, 1936 : life-cycle, epizootiology and zoonotic potential

Prociv¹

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The aim of this study was to establish whether a human epidemic of hepato-enteritis, the "Palm Island mystery disease", could have been a manifestation of nematode visceral larva migrans caused by the flying fox parasite, Toxocara pteropodis. An assessment of the risk of human exposure to such an infection, and of its pathogenicity, required collection of data from field and laboratory studies.The life-cycle was elucidated in Pteropus poliocephalus, the predominant flying fox in the Brisbane region. Adult worms develop in the intestines of suckling juveniles, and infections may become patent in bats as young as 35 days. About 50% of juveniles develop patent infections, and each harbours an average of 1 adult male worm and 2 adult females. These worms are voided spontaneously before the bats leave their summer camps.Each female worm produces about 25,000 eggs per day, most of which are shed into the environment of the summer camp. Eggs become infective from 10 days after voiding; few remain viable longer than 6 weeks. As very little fruit remote from the camps was found contaminated with eggs, adult bats probably become infected in the camps by licking foliage and grooming during wet weather. Eggs ingested by bats hatch in the intestine and the released third-stage larvae penetrate the mucosa to reach the liver via the portal vein. These larvae may remain indefinitely in the liver, where they grow over 3 months from a length of about 420 jim to about 600 pm. In male bats, hepatic larvae gradually accumulate, but in females many leave the livers at the time of parturition and pass through the mammary glands to reach the juvenile intestines in the first 3 weeks after birth. Many developing intestinal larvae, predominantly males, are expelled spontaneously in the faeces of suckling bats. This explains the low average worm burdens in patent infections and their unequal sex representation.Virtually all adult male P_^ poliocephalus harbour larvae in their livers; in adult females the prevalence and intensity of hepatic infection 11 is lower. In the P. alecto and P_^ conspicillatus populations of northern Queensland, the prevalence pattern of T_^ pteropodis appears to be similar whereas in southern P_^ alecto, and in P_^ scapulatus, infection is much less common. T. pteropodis was also found in Pteropus specimens from New Guinea, Indonesia and India. Nematodes from Rousettus sp. from the Philippines, and poorly-preserved type specimens of Toxocara cynonycteridis, from a Rousettus sp. in Burma, were very similar to, if not identical with, T. pteropodis.On detailed examination, T_^ pteropodis had some features distinct from those of other members of the genus. The relatively thick egg-shell may protect against desiccation. The second moult occurs in the egg. Thirdstage larvae grow in the livers of definitive (and some abnormal) hosts.Adult worms have cephalic surface features which may be unique, and do not possess a cervical alar "supporting bar" typical of the genus.Experimental mammals other than bats exhibit v...

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Toxocara and Neoascaris: studies on morphology development and migratory behaviour

Cited by 3 publications

References 0 publications

First record and molecular identification ofToxocara catiin a Pallas’ catOtocolobus manulfrom Kyrgyzstan

First record and molecular identification ofToxocara catiin a Pallas’ catOtocolobus manulfrom Kyrgyzstan

New findings on the helminth fauna of the common european genet (Genetta genettaL.): first record ofToxocara genettaeWarren, 1972 (Ascarididae) in Europe

Toxocara pteropodis Baylis, 1936 : life-cycle, epizootiology and zoonotic potential

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