Subtype analysis of Blastocystis sp. isolates from human and canine hosts in an urban community in the Philippines

Belleza, Maria Luz B.; Reyes, John Carlo B.; Tongol-Rivera, Pilarita; Rivera, Windell L.

doi:10.1016/j.parint.2016.02.009

Cited by 35 publications

(31 citation statements)

References 38 publications

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“…In the large majority of published surveys, canine fecal samples were either found to be negative for Blastocystis sp. [23,47–49] or infected by the parasite with a low or moderate prevalence ranging between 1.3% and 14.5% [37,50–54]. However, in some studies mainly focused on stray dogs living mostly in areas of poor sanitation and hygiene, the prevalence of Blastocystis sp.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, these three STs are predominant in this animal group according to the data compiled in previous studies (Table 3) as well as in humans, suggesting possible cross-transmission between these hosts. However, to our knowledge, only three recent papers focusing on domestic dogs and their owners in various countries showed a potential relationship between carnivore carriers and human infection through ST concordance [29,54,74]. In addition, the low to moderate prevalence of Blastocystis sp.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the low to moderate prevalence of Blastocystis sp. observed in numerous canine cohorts [37,49,51,52,54], together with the absence of a dog-specific/predominant ST, strongly suggest that dogs are unlikely to be natural hosts of Blastocystis sp. The recent study by Wang et al [51] confirmed this hypothesis by demonstrating that stray dogs in India showed both greater diversity of STs and a higher prevalence of the parasite than domestic dogs in Australia and Cambodia.…”

Section: Resultsmentioning

confidence: 99%

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Molecular Epidemiology of Blastocystis sp. in Various Animal Groups from Two French Zoos and Evaluation of Potential Zoonotic Risk

et al. 2017

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Blastocystis sp. is a common intestinal parasite infecting humans and a wide range of animals worldwide. It exhibits an extensive genetic diversity and 17 subtypes (STs) have thus far been identified in mammalian and avian hosts. Since several STs are common to humans and animals, it was proposed that a proportion of human infections may result from zoonotic transmission. However, the contribution of each animal source to human infection remains to be clarified. Therefore, the aim of this study was to expand our knowledge of the epidemiology and host specificity of this parasite by performing the largest epidemiological survey ever conducted in animal groups in terms of numbers of species screened. A total of 307 stool samples from 161 mammalian and non-mammalian species in two French zoos were screened by real-time PCR for the presence of Blastocystis sp. Overall, 32.2% of the animal samples and 37.9% of the species tested were shown to be infected with the parasite. A total of 111 animal Blastocystis sp. isolates were subtyped, and 11 of the 17 mammalian and avian STs as well as additional STs previously identified in reptiles and insects were found with a varying prevalence according to animal groups. These data were combined with those obtained from previous surveys to evaluate the potential risk of zoonotic transmission of Blastocystis sp. through the comparison of ST distribution between human and animal hosts. This suggests that non-human primates, artiodactyls and birds may serve as reservoirs for human infection, especially in animal handlers. In contrast, other mammals such as carnivores, and non-mammalian groups including reptiles and insects, do not seem to represent significant sources of Blastocystis sp. infection in humans. In further studies, more intensive sampling and screening of potential new animal hosts will reinforce these statements and expand our understanding of the circulation of Blastocystis sp. in animal and human populations.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Molecular Epidemiology of Blastocystis sp. in Various Animal Groups from Two French Zoos and Evaluation of Potential Zoonotic Risk

et al. 2017

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“…), Philippines (Belleza et al. ), and Turkey (Eroglu and Koltas ). In contrast, recent studies conducted in France and Spain showed that domestic dogs and cats had a negligible role as source of human infections (Osman et al.…”

Section: Resultsmentioning

confidence: 99%

“…Companion animal species, dogs and cats, have also been investigated to assess their potential role as suitable reservoirs of Blastocystis transmission to humans. Evidence of transmission between pets and their owners involving ST1, ST2, and/or ST3 (the Blastocystis subtypes more prevalently found circulating in humans) has been indicated by some surveys conducted in Australia (Nagel et al 2012), Philippines (Belleza et al 2016), and Turkey (Eroglu and Koltas 2010). In contrast, recent studies conducted in France and Spain showed that domestic dogs and cats had a negligible role as source of human infections (Osman et al 2015;Paulos et al 2018).…”

Section: Resultsmentioning

confidence: 99%

Blastocystis sp. Subtype Diversity in Wild Carnivore Species from Spain

Calero‐Bernal

Santı́n

Maloney

et al. 2019

J Eukaryotic Microbiology

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The occurrence and molecular diversity of the stramenopile eukaryote Blastocystis sp. was investigated by PCR and sequencing (Sanger and NGS) methods in 380 faecal specimens of free‐living carnivores in Spain. Blastocystis sp. was confirmed in 1.6% (6/380) of the specimens analysed. Two samples from a common genet and a fox were successfully subtyped as ST7 by Sanger. Using NGS, ST14 was found in a fox and a European polecat, ST7 in a fox, and two additional foxes presented mixed infections of ST1/ST2/ST4 and ST1/ST2/ST7, respectively. Wild carnivore species could act as carriers of zoonotic Blastocystis subtypes.

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Molecular epidemiology of Blastocystis sp. in dogs housed in Italian rescue shelters

et al. 2019

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Subtype analysis of Blastocystis sp. isolates from human and canine hosts in an urban community in the Philippines

Cited by 35 publications

References 38 publications

Molecular Epidemiology of Blastocystis sp. in Various Animal Groups from Two French Zoos and Evaluation of Potential Zoonotic Risk

Molecular Epidemiology of Blastocystis sp. in Various Animal Groups from Two French Zoos and Evaluation of Potential Zoonotic Risk

Blastocystis sp. Subtype Diversity in Wild Carnivore Species from Spain

Molecular epidemiology of Blastocystis sp. in dogs housed in Italian rescue shelters

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