Taenia asiatica and Taenia saginata: Genetic divergence estimated from their mitochondrial genomes

SUMMARYPartial sequences of the DNA polymerase delta (pold) gene from Taenia saginata-like adult worms were sequenced. Phylogenetic analysis revealed that pold gene sequences were clearly divided into two clades, differing from each other in five to seven nucleotides. There is little doubt that T. saginata and Taenia asiatica were once separated into two distinct taxa as has been concluded in previous studies. On the other hand, most of the adult worms, which were identified as T. asiatica using mitochondrial DNA, were homozygous for an allele that originated from the allele of T. saginata via single nucleotide substitution. These results indicate that most of the adult worms, which had been called T. asiatica, are not actually ‘pure T. asiatica’ but instead originated from the hybridization of ‘pure T. saginata’ and ‘pure T. asiatica’.

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Molecular Diagnosis of Taenia saginata Tapeworms from Two Residents of Northern Cambodia

The Korean Journal of Parasitology ◽

10.3347/kjp.2020.58.2.201 ◽

2020 ◽

Vol 58 (2) ◽

pp. 201-204 ◽

Cited By ~ 1

Author(s):

Taehee Chang ◽

Bong-Kwang Jung ◽

Woon-Mok Sohn ◽

Sooji Hong ◽

Hyejoo Shin ◽

...

Keyword(s):

Intestinal Parasites ◽

Taenia Solium ◽

Lao Pdr ◽

Elongation Factor ◽

Taenia Saginata ◽

Elongation Factor 1 Alpha ◽

Magnesium Salts ◽

Preah Vihear ◽

Elongation Factor 1 ◽

Taenia Asiatica

Taenia saginata infection has seldom been reported in Cambodia. In this study, we performed a survey of intestinal parasites in 1,156 residents of Preah Vihear and Stung Treng Provinces in 2018. The results revealed that 26 (2.4%) cases were positive for Taenia spp. eggs. In order to obtain the strobilae of the tapeworms, 2 patients in Preah Vihear were treated with praziquantel and purged with magnesium salts. The proglottids expelled after the medication were morphologically and molecularly analyzed to determine the species. The main uterine lateral braches in gravid proglottids were >15 in number suggesting that they are either T. saginata or Taenia asiatica. The sequences of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene and 2 nuclear loci, elongation factor-1 alpha (ef1) and ezrin-radixin-moesin-like protein (elp), were identical to the sequences of T. saginata available in GenBank but distant from Taenia solium, T. asiatica, and T. saginata-T. asiatica hybrid. This is the first report of the presence of T. saginata in the northern part of Cambodia bordering Lao PDR based on a molecular confirmation.

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Taeniases and cysticercosis in Indonesia: past and present situations

Parasitology ◽

10.1017/s0031182013000863 ◽

2013 ◽

Vol 140 (13) ◽

pp. 1608-1616 ◽

Cited By ~ 20

Author(s):

TONI WANDRA ◽

AKIRA ITO ◽

KADEK SWASTIKA ◽

NYOMAN S DHARMAWAN ◽

YASUHITO SAKO ◽

...

Keyword(s):

Taenia Solium ◽

Taenia Saginata ◽

Future Perspectives ◽

Larval Stages ◽

The Past ◽

Beef Tapeworm ◽

North Sumatra ◽

Taenia Asiatica

SUMMARYThe main aim of this study is to overview the past and present situations of human taeniases and cysticercosis in Indonesia and including future perspectives. Through joint projects from 1996, we have confirmed the occurrence ofTaenia saginata(beef tapeworm) in Bali, ofTaenia solium(pork tapeworm) mainly in Papua and sporadically in Bali, and ofTaenia asiaticain North Sumatra. These taeniases were caused through eating uncooked pork and pig viscera forT. soliumandT. asiatica, respectively, and beef forT. saginata. The distribution of these tapeworms in Indonesia is basically highly restricted by the traditional cultural and religious backgrounds in each island.T. saginatais relatively common in Bali although people consume pork ‘lawar’more than beef ‘lawar’. Taeniases due toT. saginataorT. asiaticaandT. soliumand cysticercosis due toT. soliumhave also been sporadically reported in some other islands. Among these species,T. soliumis exceptional since humans can be infected not only by larval stages (cysticerci) in pork but also by eggs released from human tapeworm carriers. Cysticercosis has been confirmed in Indonesia in humans, pigs and even dogs.

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Recent hybridization between Taenia asiatica and Taenia saginata

Parasitology International ◽

10.1016/j.parint.2012.01.005 ◽

2012 ◽

Vol 61 (2) ◽

pp. 351-355 ◽

Cited By ~ 28

Author(s):

Kanako Yamane ◽

Yumi Suzuki ◽

Eiko Tachi ◽

Tiaoying Li ◽

Xingwang Chen ◽

...

Keyword(s):

Taenia Saginata ◽

Taenia Asiatica

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Characterization of the Taenia spp HDP2 sequence and development of a novel PCR-based assay for discrimination of Taenia saginata from Taenia asiatica

Parasites & Vectors ◽

10.1186/1756-3305-3-51 ◽

2010 ◽

Vol 3 (1) ◽

pp. 51 ◽

Cited By ~ 10

Author(s):

Luis M González ◽

Begoña Bailo ◽

Elizabeth Ferrer ◽

Maria García ◽

Leslie JS Harrison ◽

...

Keyword(s):

Taenia Saginata ◽

Taenia Asiatica

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Taeniasis in Karangasem Regency, Bali

WMJ (Warmadewa Medical Journal) ◽

10.22225/wmj.3.1.651.1-5 ◽

2018 ◽

Vol 3 (1) ◽

pp. 1

Author(s):

Ni Wayan Winianti ◽

Elsa Herdiana M ◽

Mahardika Agus Wijayanti ◽

Putu Sutisna ◽

I Nengah Kapti ◽

...

Keyword(s):

Environmental Factors ◽

Taenia Solium ◽

Case Control ◽

Individual Characteristics ◽

Case Group ◽

Taenia Saginata ◽

Meat Processing ◽

Beef Tapeworm ◽

The Relationship ◽

Taenia Asiatica

Abstract Taeniasis is an infectious disease caused by the tapeworm Taenia saginata (beef tapeworm), Taenia solium (pork tapeworm), and Taenia asiatica (Asian tapeworm). Purpose of the study was to determine the relationship between meat consumption, individual characteristics, and environmental factors with taeniasis. Case control study was used to identify taeniasis among two groups: people living at Datah village (personal livestock) and people living at Karangasem village (obtained their meat from traditional market or slaughterhouse). Each group consisted of 98 people. Two subjects from the case group were positive for taenia egg both by direct smear and Willy’s Malory floatation methods. Proportion of taeniasisinthe case group was 2.04%. The type of meat consumed, methods of meat processing, frequency of consumption, ways of obtaining meat, individual characteristics, and environmental factors which may contribute to Taenia infection could not be evaluated due to limited number of positive cases. Abstrak Taeniasis merupakan penyakit infeksi yang disebabkan karena adanya cacing pita Taenia saginata (beef tapeworm), Taenia solium (pork tapeworm), and Taenia asiatica (Asian tapeworm)di dalam tubuh manusia. Tujuan penelitian ini untuk mengetahui hubungan antara konsumsi daging, karakteristik individu dan faktor lingkungan dengan kejadian taeniasis. Jenis rancangan penelitian yang digunakan yaitu case control antar 2 kelompok (penduduk di Desa Datah dan Kelurahan Karangasem, Kabupaten Karangasem, Bali). Kelompok kasus yaitu penduduk Desa Datah yang memenuhi kriteria kasus (mengkonsumsi daging dari hewan ternak pribadi), sedangkan kelompok kontrol yaitu penduduk di Kelurahan Karangasem yang memenuhi kriteria untuk kontrol (mengkonsumsi daging dari membeli di pasar atau tempat pemotongan hewan). Tiap kelompok terdiri dari 98 orang. Metode pemeriksaan feses dengan metode langsung dan pengapungan. Terdapat 2 orang yang positif taeniasis dari kelompok kasus, dengan ditemukan telur Taenia sp. pada pemeriksaan langsung dan pengapungan. Hubungan jenis daging, cara pengolahan, frekuensi mengkonsumsi dan cara memperoleh daging, karakteristik individu dan faktor lingkungan dengan kejadian taeniasis tidak dapat dianalisis secara statistic.

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