Trichinella infection in wild boars and synanthropic rats in northwest Vietnam

Thi, Nga Vu; Nguyen, Vinh; Praet, Nicolas; Claes, Laurence; Gabriël, Sarah; Huyen, Nguyen Thi Minh; Dorny, Pierre

doi:10.1016/j.vetpar.2013.11.011

Cited by 17 publications

(13 citation statements)

References 17 publications

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“…Of these, six went on to develop serious symptoms [58]. Following the outbreak of human trichinellosis in Son La province in 2008, 20% of free-roaming pigs were reported sero-positive for Trichinella antibodies in the four villages in which the human outbreaks occurred [59]. Of the 206 muscle samples that were sero-positive, Trichinella larvae were recovered from 11 samples and identified as T. spiralis using multiplex PCR .…”

Section: Resultsmentioning

confidence: 99%

“…The proportion of Trichinella seropositive wild boars and rats in Son La and Dien Bien province was 3.2% (2 positive out of 62 tested) and 2.8% (23 positive out of 820 tested), respectively, and 4% (5 positive out of 125 tested) of dogs were also found to be seropositive to Trichinella [60]. Surprisingly, none of the 261 confined wild boars resident on seven farms or 98 cats in these two provinces were positive [59]. In the same study, T. spiralis larval burdens quantified using multiplex PCR were relatively low at 0.1 to 0.3 larvae/gram of muscle in wild boars and 0.6 larvae/gram of muscle in rats [59].…”

Section: Resultsmentioning

confidence: 99%

“…Surprisingly, none of the 261 confined wild boars resident on seven farms or 98 cats in these two provinces were positive [59]. In the same study, T. spiralis larval burdens quantified using multiplex PCR were relatively low at 0.1 to 0.3 larvae/gram of muscle in wild boars and 0.6 larvae/gram of muscle in rats [59]. Until now, the only species of Trichinella isolated in domestic and sylvatic hosts in North Vietnam has been T. spiralis [61].…”

Section: Resultsmentioning

confidence: 99%

“…of people)Death toll (no. of people)1970Yen BaiNorthwestna2642001Dien BienNorthwestna2222004Dien BienNorthwestna20na2008Son LaNorthwest T. spiralis (animals)2222012Thanh HoaNorth Central Coast T. spiralis (humans)24naAdjusted from: De et al [58]; Vu Thi et al [59, 61]; Taylor et al [75] Abbreviation : na, not applicable

Fig. 5Map of trichinellosis outbreaks in Vietnam.…”

Section: Resultsmentioning

confidence: 99%

“…Adjusted from: De et al [58]; Vu Thi et al [59, 61]; Taylor et al [75] Abbreviation : na, not applicable…”

Section: Resultsmentioning

confidence: 99%

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A systematic review of taeniasis, cysticercosis and trichinellosis in Vietnam

2017

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Taeniasis, cysticercosis and trichinellosis have been ranked as the most important food-borne parasites of humans in terms of public health, socioeconomic and trade impact. Despite this, information on these food-borne zoonoses in Vietnam is scarce and fragmented, and many local reports remain inaccessible to the international research community. This study aims to conduct comprehensive literature searches to report on the incidence and estimate the true prevalence of taeniasis in humans and T. solium cysticercosis in humans and pigs in Vietnam utilizing Bayesian models; in addition, to report the incidence and the distribution of trichinellosis. A Bayesian approach was used to estimate the true prevalence of taeniasis and cysticercosis based on published diagnostic test characteristics used in each published cross-sectional survey. The utilization of coproscopic-based examination of Taenia eggs in stool, although highly specific for genus-level detection, has poor sensitivity and led to an underestimation of the prevalence of human taeniasis. Similarly, post-mortem-based surveys of T. solium cysticercosis in pigs also led to the underestimation of prevalence of porcine cysticercosis. On the other hand, the low specificity of immunodiagnostic methods, in particular Ab-ELISA, led to a likely overestimation of T. solium cysticercosis in humans. Due to the use of imperfect diagnosis tests combined with poor descriptions of sampling methods, our ability to draw solid conclusions from these data is limited. We estimate that the true prevalence of taeniasis and T. solium cysticercosis in rural ‘hotspots’, is as high as 13% for each, in humans. Taeniasis and T. solium cysticercosis occurs in 60 of the 63 provinces of Vietnam. Most of the information relating to the distribution and prevalence of porcine cysticercosis is limited to commercial abattoir surveys. In Vietnam, Taenia asiatica appears to be confined to the north where it occurs sympatrically with T. solium and Taenia saginata. The status of T. asiatica in Central and South Vietnam remains unascertained. To date, five outbreaks of trichinellosis have been reported in the north and northwest of Vietnam, affecting a total of 114 people and responsible for eight fatalities. In the same region, studies of free-roaming pigs showed evidence of high levels of exposure to Trichinella and, in cases where larvae were recovered, the species present were identified as Trichinella spiralis. Based on five studies, the main risk factors for pork-borne zoonoses in Vietnam include the consumption of undercooked/raw meat and vegetables and the use of night-soil for fertilization of local produce. This systematic review draws attention to the importance of these pork-borne zoonoses.Electronic supplementary materialThe online version of this article (doi:10.1186/s13071-017-2085-9) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fig. 5Map of trichinellosis outbreaks in Vietnam.…”

Section: Resultsmentioning

confidence: 99%

“…Adjusted from: De et al [58]; Vu Thi et al [59, 61]; Taylor et al [75] Abbreviation : na, not applicable…”

Section: Resultsmentioning

confidence: 99%

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A systematic review of taeniasis, cysticercosis and trichinellosis in Vietnam

2017

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The Changing Biodiversity of Parasite Hosts in Southeast Asia

Saijuntha

Petney

2021

Parasitology Research Monographs

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Search for antibodies against Trichinella in two synanthropic Procyonidae species from southeast Mexico: white-nosed coatis (Nasua narica) and raccoons (Procyon lotor)

Hernández-Ortiz,

Rendón-Franco,

Muñoz-García

et al. 2023

Vet Res Commun

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Trichinella is a nematode that are spread by the consumption of parasitized meat. Carnivora, a mammalian order, serve as key hosts for this parasite. However, evidence of Trichinella in wildlife from the Neotropics is extremely scarce, with reports documenting its presence only for five carnivore species: two Felidae, one Otariidae and two Mustelidae. Other widely distributed species that are consumed as bushmeat, such as Procyonidae, have not been studied in this context. A long-term study was performed for antibodies against Trichinella in coatis (Nasua narica) and common raccoons (Procyon lotor) in southeastern Mexico. Between the summer of 2009 to the winter 2013, a total of 291 coati samples and 125 raccoon samples were collected from a tropical green area located within an urban zone. An Enzyme-linked immunosorbent assay (ELISA) was used to detect antibodies against the excretory and secretory products of Trichinella spiralis muscle larva. ELISA-positive samples were further confirmed by Western Blot analysis. Results showed no evidence of antibodies during the first two years of study. However, in 2011, a sudden appearance of anti-Trichinella occurred. The seroprevalence reached its highest peak of 43% for coatis during winter 2013 and 53% for raccoons in summer 2013. This is the first study that provides evidence of Trichinella circulation within a neotropical procyonid community.

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Trichinella infection in wild boars and synanthropic rats in northwest Vietnam

Cited by 17 publications

References 17 publications

A systematic review of taeniasis, cysticercosis and trichinellosis in Vietnam

A systematic review of taeniasis, cysticercosis and trichinellosis in Vietnam

The Changing Biodiversity of Parasite Hosts in Southeast Asia

Search for antibodies against Trichinella in two synanthropic Procyonidae species from southeast Mexico: white-nosed coatis (Nasua narica) and raccoons (Procyon lotor)

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