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- W1535890277 abstract "The recent article in CMI by Furrows et al. [1] pointed out the lack of specificity of a single positive 50-kDa band in the electroimmunotransfer blot assay for cysticercosis. Until now, such a test has been considered to be 100% specific for the diagnosis of Taenia solium cysticercosis. It is accepted that only T. solium causes human cysticercosis and not Taenia saginata. However, there is a third human taeniid, Taenia asiatica, first described in 1993 [2], for which the definitive geographical distribution is still unknown. Some specialists discount T. asiatica as a possible cause of human cysticercosis because of its molecular similarities with T. saginata [3], while others consider that T. asiatica should be a candidate for human cysticercosis until there is evidence to the contrary [4]. At the present time, the possibility that T. asiatica could also cause human cysticercosis is certainly significant. In this respect, Furrows et al. [1] reported that two of the apparently non-cysticercotic patients showing positive bands in the electroimmunotransfer blot assay were parasitised by adult tapeworms. Specifically, one patient harboured T. saginata, and the electroimmunotransfer blot assay yielded two positive bands. The authors do not specify the patient's geographical origin, or the diagnostic procedure employed to identify the tapeworm species. The morphology of T. saginata and T. asiatica proglottids is essentially the same, but it would be possible to ascertain the species of the tapeworm by using a multiplex PCR described previously [5]. If the patient had harboured T. asiatica instead of T. saginata, the positive bands found would have confirmed the results obtained by Pilcher et al. [6], who reported positive bands with the T. solium electroimmunotransfer blot assay in pigs with T. asiatica cysticercosis, but reported no bands in sera from patients infected with T. saginata. It would therefore be interesting if Furrows and colleagues could confirm, at the molecular level, the identification of the Taenia spp. found in the patients with positive bands. It is possible that the bands result from a cross-reaction with T. asiatica cysticercosis, as described by Pilcher et al. [6]. In T. solium taeniasis, a high percentage of patients with intestinal adult worms also present with extra-intestinal cysticerci, which might also be the case for T. asiatica. It should be taken into account that T. asiatica cysticerci show a clear liver tropism in their intermediate host (pigs). Consequently, T. asiatica would cause hepatic cysticercosis in humans instead of the muscle cysticercosis, ophthalmocysticercosis or neurocysticercosis seen with T. solium [7]. We would also suggest the use of imaging techniques at the hepatic level or liver sonography [8] for non-T. solium cysticercotic patients with positive bands (with or without intestinal tapeworms), with the aim of discovering cysticerci in unsuspected locations. T. asiatica cysticerci lack rostellar hooklets, or have hooklets that are much smaller than those of T. solium, so a subsequent morphological and/or molecular study of the cysticerci would determine whether the species in question is T. solium or T. asiatica." @default.
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- W1535890277 date "2007-01-01" @default.
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- W1535890277 title "The specificity of the electroimmunotransfer blot assay for Taenia solium cysticercosis" @default.
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- W1535890277 doi "https://doi.org/10.1111/j.1469-0691.2006.01593_1.x" @default.
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