1.Taenia asiatica: the Most Neglected Human Taenia and the Possibility of Cysticercosis.
M Teresa GALAN-PUCHADES ; Mario V FUENTES
The Korean Journal of Parasitology 2013;51(1):51-54
Not only Taenia solium and Taenia saginata, but also Taenia asiatica infects humans. The last species is not included in the evaluation of the specificity of the immunodiagnostic techniques for taeniasis/cysticercosis. There is currently no specific immunodiagnostic method for T. asiatica available. Therefore, due to the fact that molecular techniques (the only tool to distinguish the 3 Taenia species) are normally not employed in routine diagnostic methods, the 2 questions concerning T. asiatica (its definite geographic distribution and its ability to cause human cysticercosis), remain open, turning T. asiatica into the most neglected agent of human taeniasis-cysticercosis.
Animals
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Clinical Laboratory Techniques/methods
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Humans
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Neglected Diseases/*epidemiology/*parasitology
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Parasitology/methods
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Taenia/*isolation & purification/pathogenicity
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Taeniasis/diagnosis/*epidemiology/*parasitology
2.Discovery of Taeniid Eggs from A 17th Century Tomb in Korea.
Hye Jung LEE ; Dong Hoon SHIN ; Min SEO
The Korean Journal of Parasitology 2011;49(3):327-329
Even though Taenia spp. eggs are occasionally discovered from archeological remains around the world, these eggs have never been discovered in ancient samples from Korea. When we attempted to re-examine the archeological samples maintained in our collection, the eggs of Taenia spp., 5 in total number, were recovered from a tomb of Gongju-si. The eggs had radially striated embryophore, and 37.5-40.0 micromx37.5 microm in size. This is the first report on taeniid eggs from ancient samples of Korea, and it is suggested that intensive examination of voluminous archeological samples should be needed for identification of Taenia spp.
Animals
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*Fossils
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Ovum
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Republic of Korea
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Taenia/anatomy & histology/*embryology/*isolation & purification
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Taeniasis/*parasitology
3.A case of Taenia saginata infection involving gallbladder and common bile duct.
Young Ho KIM ; Je Geun CHI ; Seung Yull CHO
The Korean Journal of Parasitology 1981;19(2):167-172
A 77-year old man living in Kyunggi-Do, Korea was surgically treated at Seoul National University Hospital on April 1981, because of acute abdomen. At laparotomy, a 1.77m long adult Taenia saginata was found both in gallbladder and in common bile duct to cause acute gangrenous cholecystitis. The relevant literature were reviewed and possible mechanisms of the disease were discussed.
parasitology-helminth-cestoda
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Taenia saginata-taeniasis
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case report
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gallbladder
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common bile duct
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acute abdomen
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laparatomy
4.State of the Art of Taenia solium as Compared to Taenia asiatica.
The Korean Journal of Parasitology 2013;51(1):43-49
Three species of tapeworms infect humans in their adult stage (Taenia solium, Taenia saginata and Taenia asiatica). The 3 are flat, opaque white or yellowish, and exceptional long segmented parasites, measuring 1 to 12 m in their adult stage. In this review, the development of the knowledge regarding the first species, mainly focused on understanding how the larval stage or cysticercus is transmitted to humans, is described. The second species is a cosmopolitan parasite that only causes taeniosis and not cysticercosis; therefore, it will not be included. Information on the third species, which is presently being produced, since this species was recognized as such only at the end of the 20th century, will be discussed at the end of this review.
Animals
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Biomedical Research/trends
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Humans
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Life Cycle Stages
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Taenia/*pathogenicity/physiology
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Taeniasis/*parasitology/transmission
5.A study on the intestinal helminths of the patients in a leprosarium in Korea.
Sung Tae HONG ; Sung Jong HONG ; Soon Hyung LEE ; Ik Sang KIM ; Jung Sik SHIN
The Korean Journal of Parasitology 1983;21(1):102-104
A total of 2,026 leprosy patients of the National Sorokdo Hospital was examined their intestinal parasites by cellophane thick smear method in January 1983. The egg positive cases of Taenia spp. were treated with bithionol and the segments of Taenia were collected for species identification. The results were as follows: Total egg positive rate of any kind helminth was 78.2 percent and cumulative total was 85.2 percent. The egg positive rate for each helminth was as follow; Taenia spp. 3.4 percent, Ascaris lumbricoides 4.5 percent, Trichuris trichiura 72.l percent, Clonorchis sinensis 2.8 percent and other 0.05 percent. A total of 66 Taenia egg positive cases was treated; out of them proglottids of Taenia were collected from 26 cases. All of the collected worms were identified as T. saginata. The results revealed significantly high egg positive rate of T. trichiura. However, A. lumbricoides was found to be controlled considerably by repeated chemotherapy during past 3 years. If chemotherapeutic agent is replaced with oxantel-pyrantel tablet, better result is expected. No clue was found for prevalence of T. solium from both human and the pig in the island.
parasitology-helmith-nematoda-trematoda-cestoda
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trichuriasis
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Trichuris trichiura
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Taenia spp.
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Ascaris lumbricoides
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Clonorchis sinensis
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taeniasis
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ascariasis
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clonorchiasis
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Taenia saginata
;
epidemiology
6.Immunoblot Patterns of Taenia asiatica Taeniasis.
Hyeong Kyu JEON ; Keeseon S EOM
The Korean Journal of Parasitology 2009;47(1):73-77
Differential diagnosis of Taenia asiatica infection from other human taeniases by serology has been tested. An enzyme-linked immunoelectrotransfer blot (EITB) was applied to subjected human sera and tapeworm materials. Thirty-eight proteins reactive to serum IgG were observed between 121 and 10 kDa in adult worms, and more than 22 serum-reactive components between 97 kDa and 21.5 kDa were observed in eggs of T. asiatica. Antigens of adult T. asiatica revealed immunoblot bands between 120 and 21.5 kDa against T. asiatica infected sera. Antigens of adult Taenia saginata revealed 110-100, 66, 58-56, and 46 kDa immunoblot bands against T. asiatica infected sera. Antigens of adult Taenia solium also revealed 99-97, 68-66, and 46 kDa bands against T. asiatica infected sera. The immunoblot band of 21.5 kDa exhibited specificity to T. asiatica.
Animals
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Antibodies, Helminth/immunology
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Antigens, Helminth/chemistry/immunology
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Humans
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Immunoblotting
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Molecular Weight
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Taenia/chemistry/*immunology
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Taeniasis/*immunology/parasitology
7.Stratified sampling survey of major human parasitic diseases in Henan province.
B L XU ; H W ZHANG ; Y DENG ; Z L CHEN ; W Q CHEN ; D L LU ; Y L ZHANG ; Y L ZHAO ; X M LIN ; Q HUANG ; C Y YANG ; Y LIU ; R M ZHOU ; P LI ; J S CHEN ; L J HE ; D QIAN
Chinese Journal of Epidemiology 2018;39(3):322-328
Objective: To understand the prevalence of major human parasitic diseases and related factors in Henan province. Methods: This stratified sampling survey was carried out according to the requirement of national survey protocol of major human parasitic diseases, 2014-2015. The prevalence of soil-transmitted helminths infection, taeniasis and intestinal protozoiasis were surveyed in 104 sites selected from 35 counties (districts) and the prevalence of clonorchiasis was surveyed in 62 sites selected from 37 townships. In each survey spot, 250 persons were surveyed. A total of 26 866 persons and 15 893 persons were surveyed. Modified Kato-Katz thick smear was used to detect the eggs of intestinal helminthes. Tube fecal culture was used to identify the species of hookworm. The Enterobius eggs were detected in children aged 3 to 6 years by using adhesive tape. The cyst and trophozoite of intestinal protozoa were examined with physiological saline direct smear method and iodine stain method. Results: The overall infestation rate of intestinal parasites was2.02% in Henan, and the worm infection rate was higher than protozoa infection rate. Fourteen kinds of intestinal parasites were found, including nematode (5 species), trematode (2 species), and protozoan (7 species). The infection rate of Enterobius vermicularis was highest, and Qinba Mountain ecological area had the highest infestation rate of intestinal parasites in 4 ecological areas of Henan. There was no significant difference in intestinal parasite infection rate between males and females (χ(2)=3.630, P=0.057), and the differences in intestinal parasite infection rate among different age groups had significance (χ(2)=124.783, P=0.000 1). The infection rate reached the peak in age group ≤9 years and the major parasite was Enterobius vermicularis. Furthermore the overall human infection rate of parasite showed a downward trend with the increase of educational level of the people (χ(2)=70.969, P=0.000 1), the differences had significance (χ(2)=120.118, P=0.000 1). For different populations, the infection rate of intestinal parasites was highest among preschool children. The infection of intestinal helminth was mainly mild, only 2 severe cases were detected. The infection rate of Clonorchis sinensis in urban residents was only 0.006%. Logistic regression analysis showed that being preschool children (χ(2)=15.765, P=0.000 1) and drinking well water (χ(2)=45.589, P=0.000 1) were the risk factors for intestinal parasite infection, and annual income per capita of farmers was the protective factor against intestinal parasite infection. The infection rates of protozoa and intestinal parasites decreased sharply compared with the results of previous two surveys, and the rate of intestinal helminth infection also dropped sharply compared with the second survey. The numbers of protozoa, helminth and intestinal parasites detected in this survey were all less than the numbers found in the previous two surveys. Conclusions: Compared the results of three surveys in Henan, the infection rate of protozoa and intestinal parasites showed a downward trend. The prevention and treatment of Enterobius vermicularis infection in children should be the key point of parasitic disease control in the future.
Animals
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Child
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Child, Preschool
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Clonorchiasis/epidemiology*
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Farmers
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Feces/parasitology*
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Female
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Helminthiasis/epidemiology*
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Helminths
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Humans
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Intestinal Diseases, Parasitic/parasitology*
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Male
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Prevalence
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Protective Factors
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Risk Factors
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Rural Population
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Soil Microbiology
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Surveys and Questionnaires
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Taeniasis/epidemiology*
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Trematode Infections/parasitology*
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Urban Population
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Water Wells
8.Molecular Approaches to Taenia asiatica.
Hyeong Kyu JEON ; Keeseon S EOM
The Korean Journal of Parasitology 2013;51(1):1-8
Taenia solium, T. saginata, and T. asiatica are taeniid tapeworms that cause taeniasis in humans and cysticercosis in intermediate host animals. Taeniases remain an important public health concerns in the world. Molecular diagnostic methods using PCR assays have been developed for rapid and accurate detection of human infecting taeniid tapeworms, including the use of sequence-specific DNA probes, PCR-RFLP, and multiplex PCR. More recently, DNA diagnosis using PCR based on histopathological specimens such as 10% formalin-fixed paraffin-embedded and stained sections mounted on slides has been applied to cestode infections. The mitochondrial gene sequence is believed to be a very useful molecular marker for not only studying evolutionary relationships among distantly related taxa, but also for investigating the phylo-biogeography of closely related species. The complete sequence of the human Taenia tapeworms mitochondrial genomes were determined, and its organization and structure were compared to other human-tropic Taenia tapeworms for which complete mitochondrial sequence data were available. The multiplex PCR assay with the Ta4978F, Ts5058F, Tso7421F, and Rev7915 primers will be useful for differential diagnosis, molecular characterization, and epidemiological surveys of human Taenia tapeworms.
Animals
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DNA, Helminth/genetics
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DNA, Mitochondrial/genetics
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Humans
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Molecular Diagnostic Techniques/*methods
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Parasitology/*methods
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Taenia/classification/*genetics/*isolation & purification
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Taeniasis/*diagnosis/*veterinary
9.Infection of Taenia asiatica in a Bai Person in Dali, China.
Li WANG ; Xuenong LUO ; Junling HOU ; Aijiang GUO ; Shaohua ZHANG ; Hailong LI ; Xuepeng CAI
The Korean Journal of Parasitology 2016;54(1):67-70
We report here a human case of Taenia asiatica infection which was confirmed by genetic analyses in Dali, China. A patient was found to have symptoms of taeniasis with discharge of tapeworm proglottids. By sequencing of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene, we observed nucleotide sequence identity of 99% with T. asiatica and 96% with T. saginata. Using the cytochrome b (cytb) gene, 99% identity with T. asiatica and 96% identity with T. saginata were found. Our findings suggest that taeniasis of people in Dali, China may be mainly caused by T. asiatica.
Adult
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Animals
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China
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Cytochromes b/genetics
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Electron Transport Complex IV/genetics
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Humans
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Male
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Phylogeny
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Sequence Homology, Nucleic Acid
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Taenia/classification/genetics/isolation & purification/*physiology
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Taeniasis/*parasitology
10.Genetic Variation of Taenia Pisiformis Collected from Sichuan, China, Based on the Mitochondrial Cytochrome b gene.
Deying YANG ; Yongjun REN ; Yan FU ; Yue XIE ; Huaming NIE ; Xiang NONG ; Xiaobin GU ; Shuxian WANG ; Xuerong PENG ; Guangyou YANG
The Korean Journal of Parasitology 2013;51(4):449-452
Taenia pisiformis is one of the most important parasites of canines and rabbits. T. pisiformis cysticercus (the larval stage) causes severe damage to rabbit breeding, which results in huge economic losses. In this study, the genetic variation of T. pisiformis was determined in Sichuan Province, China. Fragments of the mitochondrial cytochrome b (cytb) (922 bp) gene were amplified in 53 isolates from 8 regions of T. pisiformis. Overall, 12 haplotypes were found in these 53 cytb sequences. Molecular genetic variations showed 98.4% genetic variation derived from intra-region. F(ST) and Nm values suggested that 53 isolates were not genetically differentiated and had low levels of genetic diversity. Neutrality indices of the cytb sequences showed the evolution of T. pisiformis followed a neutral mode. Phylogenetic analysis revealed no correlation between phylogeny and geographic distribution. These findings indicate that 53 isolates of T. pisiformis keep a low genetic variation, which provide useful knowledge for monitoring changes in parasite populations for future control strategies.
Animals
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China
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Cytochromes b/*genetics
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*Genetic Variation
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Helminth Proteins/*genetics
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Humans
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Mitochondria/*genetics
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Molecular Sequence Data
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Phylogeny
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Rabbits
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Taenia/classification/genetics/*isolation & purification
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Taeniasis/*parasitology