Redescription of <i>Tanqua tiara</i> (Nematoda, Gnathostomidae), and associated lesions in the stomach of the Nile monitor lizard (<i>Varanus niloticus</i>)

Gibbons, Lynda M.; Keymer, I. F.

doi:10.1111/j.1463-6409.1991.tb00271.x

Cited by 9 publications

(14 citation statements)

References 8 publications

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“…We found that the stomach walls of keelbacks exhibited severe inflammation and bacterial infection around the sites of Tanqua attachment, similar to findings in other taxa (Pflugfelder ; Naidu ; Gibbons & Keymer ). Based on the sparse gut contents of the worms, they appear to feed, at least in part, on host tissue in the form of inflammatory cells and exudate (Pflugfelder ; Jones ).…”

Section: Discussionsupporting

confidence: 89%

“…Similar severe inflammatory reactions to Tanqua sp. have been described in snakes and varanid lizards (Pflugfelder ; Naidu ; Gibbons & Keymer ), although not all gastric nematodes invoke a host inflammatory response. Encysted physalopterid larvae, for example, only appear to become infiltrated with immune cells after the larva within has died (Jones ).…”

Section: Discussionmentioning

confidence: 99%

“…). Nonetheless, even subclinical pathological effects can reduce host fitness (Gibbons & Keymer ; Barber et al . ; Gunn & Irvine ; Poulin ).…”

Section: Introductionmentioning

confidence: 99%

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High infection intensities, but negligible fitness costs, suggest tolerance of gastrointestinal nematodes in a tropical snake

Mayer¹,

Brown

Zimmermann³

et al. 2015

Austral Ecology

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22We investigated patterns of prevalence and intensity of gastrointestinal nematode infections in 23 a tropical natricine snake, the keelback (Tropidonophis mairii). Ninety-eight percent of 24 keelbacks were infected with Tanqua anomala (Gnathostomidae), with infection intensities of 25 up to 243 worms per snake. Infection with T. anomala caused severe inflammation of 26 stomach mucosa and submucosa at the sites of parasite attachment and encystment. 27Nonetheless, we did not detect detrimental effects of nematode infection on measures of 28 fitness among wild or captive snakes. Snakes with heavier nematode infections had higher 29 body condition scores than did less-infected individuals. De-worming captive snakes had no 30 measurable effect on their growth rate, body condition or locomotor performance. In 31 combination with an earlier study on blood-dwelling hepatozoons, our work suggests that 32 keelbacks have a high tolerance to parasites. The 'fast-pace' life history and short lifespan of 33 these snakes may make it beneficial for them to tolerate infection, rather than expend energy 34 on resisting parasite attack. 35 36

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

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High infection intensities, but negligible fitness costs, suggest tolerance of gastrointestinal nematodes in a tropical snake

Mayer¹,

Brown

Zimmermann³

et al. 2015

Austral Ecology

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“…Adults mature in elasmobranchs (Millemann 1963, Troncy 1969, Machida et al 1982, Beveridge 1987, Hoberg et al 1998, Moravec & Nagasawa 2000, Moravec & Justine 2006, characids (Gomes & Kohn 1970, Moravec 2007a, chelonians (Hedrick 1935, Freitas & Dobbin 1971, Berry 1985, S à nchez et al 2006, Roca & Garcia 2008, Muniz-Pereira et al 2009), varanids (Gibbons & Keymer 1991), snakes (Ghadirian 1968), frogs (Morishita 1926) and salamanders (Hasegawa et al 1998). Adults mature in elasmobranchs (Millemann 1963, Troncy 1969, Machida et al 1982, Beveridge 1987, Hoberg et al 1998, Moravec & Nagasawa 2000, Moravec & Justine 2006, characids (Gomes & Kohn 1970, Moravec 2007a, chelonians (Hedrick 1935, Freitas & Dobbin 1971, Berry 1985, S à nchez et al 2006, Roca & Garcia 2008, Muniz-Pereira et al 2009), varanids (Gibbons & Keymer 1991), snakes (Ghadirian 1968), frogs (Morishita 1926) and salamanders …”

Section: Distribution Host Range Site Of Infection and Life Cyclementioning

confidence: 99%

7.21 Order Spirurida

Bain¹,

Mutafchiev²,

Junker³

2013

Nematoda

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“…Tanqua tiara (T. tiara) is the gastric nematode of Varanus salvator (V. salvator) [1][2][3][4], this worms first identified by [5] as Ascaris tiara and enhanced being genus Tanqua by [6].…”

Section: Introductionmentioning

confidence: 99%

Morphological Identification Nematodes Tanqua tiara Found on Gastric Varanus salvator at East Java

Agustin¹,

Koesdarto²,

Lukiswanto³

et al. 2017

KLS

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Tanqua tiara (T. tiara) is the gastric nematode of Varanus salvator (V. salvator) [1-4], this study was conducted to identification morphology of T. tiara. Although there are no reports of human and animal infection T.tiara but still have the potential to transmit the disease to humans through direct contact or indirectly. Isolation of adult worms T. tiara from the digestive tract of V. salvator and then will make to dry preparat.Some 20 V.alvator's gastrointestinal tract at autopsy and gained as much as 321 nematode worms, nematode worms were obtained from the stomach V. salvator, result identification from dry preparat show : Male (mm) (Total length of body 9.4-32, Wide body 0,26-1,77, Diameter of head-bulb 0,17-0,32, The length of the head 0,23-0,33, Distance from the head-end to the end of the esophagus 2,8-5,7, Distance from the head-end to cervical sac 0,22-0,81, The thickness of the cuticle 0,008-0,036, Long tail 0,13-0,42, Long spikula0,3-1,1) and female (mm) (Total length of body 6,8-22, Wide body 0,14-2,33, Diameter of head-bulb 0,15-0,34, The length of the head 0,1-0,28, Distance from the head-end to the end of the esophagus 2,3-4,58, Distance from the head-end to cervical sac 0,18-0,88, The thickness of the cuticle 0,007-0,031, Long tail 0,12-0,28, Distance vulva from the tail end 3,02-3,61, Long uterus 13,1-21,4, size of egg 0,04-0,052X0,03-0,049). Identification of morphological Tanqua tiara indicate worms vary in size, but the specimen is dominated by small-sized worms. Keywords: Varanus salvator; Tanqua tiara; Cephalic bulb.

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Redescription of Tanqua tiara (Nematoda, Gnathostomidae), and associated lesions in the stomach of the Nile monitor lizard (Varanus niloticus)

Cited by 9 publications

References 8 publications

High infection intensities, but negligible fitness costs, suggest tolerance of gastrointestinal nematodes in a tropical snake

High infection intensities, but negligible fitness costs, suggest tolerance of gastrointestinal nematodes in a tropical snake

7.21 Order Spirurida

Morphological Identification Nematodes Tanqua tiara Found on Gastric Varanus salvator at East Java

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