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Taenia solium

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https://www.readbyqxmd.com/read/29351090/parasitic-infections-of-the-skin-and-subcutaneous-tissues
#1
Andrew P Norgan, Bobbi S Pritt
A variety of arthropods, protozoa, and helminths infect the skin and subcutaneous tissues and may be identified by anatomic pathologists in standard cytology and histology preparations. The specific organisms seen vary greatly with the patient's exposure history, including travel to or residence in endemic countries. Arthropods are the most commonly encountered parasites in the skin and subcutaneous tissues and include Sarcoptes scabei, Demodex species, Tunga penetrans, and myiasis-causing fly larvae. Protozoal parasites such as Leishmania may also be common in some settings...
January 18, 2018: Advances in Anatomic Pathology
https://www.readbyqxmd.com/read/29318994/a-rare-pediatric-case-of-neurocysticercosis-misdiagnosed-as-brain-abscess
#2
Türkan Aydın Teke, Ayşe Kaman, Zeynep Gökçe Gayretli Aydın, Sema Apaydın, Çiğdem Genç Sel, Erkut Baha Bulduk, Saliha Kanık Yüksek, Kader Karlı Oğuz, Gönül Tanır
Neurocysticercosis is a parasitic infection of the central nervous system caused by the larval stage of Taenia solium. Although this zoonotic infection is one of the major public health problems in some developing countries, it is extremely rare in Turkey. In this article, we present the case of a pediatric patient with neurocysticercosis who was misdiagnosed with brain abscess because of focal seizures in another hospital.
December 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29314480/preliminary-assessment-of-the-computer-based-taenia-solium-educational-program-the-vicious-worm-on-knowledge-uptake-in-primary-school-students-in-rural-areas-in-eastern-zambia
#3
Emma C Hobbs, Kabemba Evans Mwape, Inge Van Damme, Dirk Berkvens, Gideon Zulu, Moses Mambwe, Mwelwa Chembensofu, Isaac Khozozo Phiri, Maxwell Masuku, Emmanuel Bottieau, Brecht Devleesschauwer, Niko Speybroeck, Angela Colston, Pierre Dorny, Arve Lee Willingham, Sarah Gabriël
OBJECTIVE: The zoonotic helminth Taenia solium is endemic in Zambia, causing human (taeniasis and (neuro)cysticercosis) and pig (porcine cysticercosis) diseases with high health, social and economic burdens. We aimed to evaluate the impact of a health educational program intended to lead to powerful and cumulative improvements in knowledge, attitudes and practices that decrease parasite transmission and disease occurrence. METHODS: Half-day health education workshops were conducted in three primary schools in the highly endemic Eastern Province of Zambia, using the computer-based T...
January 4, 2018: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29284011/genetic-variability-of-taenia-solium-cysticerci-recovered-from-experimentally-infected-pigs-and-from-naturally-infected-pigs-using-microsatellite-markers
#4
Mónica J Pajuelo, María Eguiluz, Elisa Roncal, Stefany Quiñones-García, Steven J Clipman, Juan Calcina, Cesar M Gavidia, Patricia Sheen, Hector H Garcia, Robert H Gilman, Armando E Gonzalez, Mirko Zimic
The adult Taenia solium, the pork tapeworm, usually lives as a single worm in the small intestine of humans, its only known definitive host. Mechanisms of genetic variation in T. solium are poorly understood. Using three microsatellite markers previously reported [1], this study explored the genetic variability of T. solium from cysts recovered from experimentally infected pigs. It then explored the genetic epidemiology and transmission in naturally infected pigs and adult tapeworms recovered from human carriers from an endemic rural community in Peru...
December 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29260655/spontaneously-arrested-transmission-of-cysticercosis-in-a-highly-endemic-village-with-a-very-low-migration-rate
#5
Oscar H Del Brutto, Seth E O'Neal, Pierre Dorny, Héctor H García
Taenia solium cysticercosis is difficult to eliminate without interventions or societal development. Atahualpa is a rural Ecuadorian village with documented low migration rate, where domestic pig raising is common and human cysticercosis is endemic. To assess neurocysticercosis (NCC) prevalence, 1,273 villagers aged ≥ 20 years underwent neuroimaging studies, which showed calcified lesions in 121 (9.5%) individuals, but no active disease. Likewise, positive reactions, apparently nonspecific, were found in only 3/200 subjects by the use of a monoclonal antibody-based enzyme-linked immunosorbent assay to detect T...
December 18, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29230579/prevalence-of-cysticercosis-in-estonian-pigs-and-cattle
#6
Elisabeth Dorbek-Kolin, Tuuli Åhlberg, Lea Tummeleht, Dennis Tappe, Maria Vang Johansen, Brian Lassen
Taenia solium has been ranked as the most important foodborne parasite and Taenia saginata as the most commonly found human Taenia tapeworm worldwide. The last official reports of taeniosis from Estonia were in 2003 for T. solium and 2012 for T. saginata. By law, all animal cases of cysticercosis must be registered and reported when found. Our aim was to estimate the prevalence of cysticercosis in Estonia caused by T. solium in pigs and T. saginata in cattle. The four slaughterhouses participating in the study slaughter between them approximately 80% of pigs and cattle in Estonia annually...
December 11, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29210354/neurocysticercosis-among-people-living-nearby-pigs-heavily-infected-with-cysticercosis-in-rural-endemic-peru
#7
Brian T Garvey, Luz M Moyano, Viterbo Ayvar, Silvia Rodriguez, Robert H Gilman, Armando E Gonzalez, Hector H Garcia, Seth E O'Neal, For The Cysticercosis Working Group In Peru
Neurocysticercosis causes substantial neurologic morbidity in endemic regions around the world. In this cross-sectional study, we describe the frequency of neurocysticercosis among a presumed high-risk group of people in an endemic community in northern Peru. Participants who screened positive on a nine-question seizure survey were evaluated clinically to diagnose epilepsy using International League Against Epilepsy criteria. Those with epilepsy were offered a noncontrast computerized tomography (CT) of the head...
December 4, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29190292/tnf-%C3%AE-blockade-suppresses-pericystic-inflammation-following-anthelmintic-treatment-in-porcine-neurocysticercosis
#8
Siddhartha Mahanty, Miguel A Orrego, Carla Cangalaya, M Paz Adrianzen, Gianfranco Arroyo, Juan Calcina, Armando E Gonzalez, Héctor H García, Cristina Guerra-Giraldez, Theodore E Nash
BACKGROUND: Neurocysticercosis (NCC) is an infection of the brain with the larval cyst of the tapeworm, Taenia solium. Cysticidal treatment induces parasite killing resulting in a post inflammatory response and seizures, which generally requires corticosteroid treatment to control inflammation. The nature of this response and how to best control it is unclear. We investigated the anti-inflammatory effects of pretreatment with etanercept (ETN), an anti-tumor necrosis factor agent, or dexamethasone (DEX), a high potency corticosteroid, on the post treatment inflammatory response in naturally infected pigs with neurocysticercosis after a single dose of the cysticidal drug praziquantel (PZQ)...
November 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29174867/the-synthesis-of-steroids-by-taenia-crassiceps-wfu-cysticerci-and-tapeworms-is-related-to-the-developmental-stages-of-the-parasites
#9
J M Patricio-Gómez, R A Valdez, A Veloz, L Aguilar-Vega, R Zurabian, M C Romano
Taeniids tapeworms are hermaphroditic helminths that gradually develop testis and ovaries in their reproductive units. The larval stage of the tapeworms named cysticercus is a vesicle that contains the scolex and proliferates asexually in the abdominal cavity of mice. Once in the host, they evaginate, attach to the gut and develop into an adult organism, the tapeworm. We have previously reported reported that T. crassiceps ORF and solium cysticerci transform steroid precursors to androgens and estrogens. Taenia crassiceps WFU cysticerci can also synthesize corticosteroids...
November 22, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29167825/an-epidemiological-survey-of-porcine-cysticercosis-in-nyasa-district-ruvuma-region-tanzania
#10
Seria M Shonyela, Ernatus M Mkupasi, Sikasunge C Sikalizyo, Evance M Kabemba, Helena A Ngowi, Isaac Phiri
Porcine cysticercosis (PC) caused by Taenia solium larvae is continuing being important zoonotic disease in many developing countries. It poses a serious public health risk and leads to economic losses to pig production industry. This study was carried out to determine the prevalence and risk factors associated with PC transmission in Nyasa District. To establish the prevalence of PC, a cross-sectional survey was conducted involving 698 pigs by tongue examination, 330 pigs by Ag-ELISA test and 22 pigs by meat inspection...
November 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29160912/low-sensitivity-and-frequent-cross-reactions-in-commercially-available-antibody-detection-elisa-assays-for-taenia-solium-cysticercosis
#11
Hector H Garcia, Yesenia Castillo, Isidro Gonzales, Javier A Bustos, Herbert Saavedra, Louis Jacob, Oscar H Del Brutto, Patricia P Wilkins, Armando E Gonzalez, Robert H Gilman
OBJECTIVE: To evaluate the diagnostic performance of two commercially available ELISA kits, Novalisa(®) and Ridascreen(®) , for the detection of antibodies to Taenia solium, compared to serological diagnosis of neurocysticercosis (NCC) by LLGP-EITB (electro immunotransfer blot assay using lentil-lectin purified glycoprotein antigens). METHODS: Archive serum samples from patients with viable NCC (n=45) or resolved, calcified NCC (n=45), as well as sera from patients with other cestode parasites (hymenolepiasis, n=45, and cystic hydatid disease, n=45), were evaluated for cysticercosis antibody detection using two ELISA kits, Novalisa(®) and Ridascreen(®) ...
November 21, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29145875/re-visiting-the-detection-of-porcine-cysticercosis-based-on-full-carcass-dissections-of-naturally-taenia-solium-infected-pigs
#12
Mwelwa Chembensofu, K E Mwape, I Van Damme, E Hobbs, I K Phiri, M Masuku, G Zulu, A Colston, A L Willingham, B Devleesschauwer, A Van Hul, A Chota, N Speybroeck, D Berkvens, P Dorny, S Gabriël
BACKGROUND: Taenia solium is a neglected zoonotic parasite. The performances of existing tools for the diagnosis of porcine cysticercosis need further assessment, and their shortcomings call for alternatives. The objective of this study was to evaluate the performance of tongue palpation and circulating antigen detection for the detection of porcine cysticercosis in naturally infected pigs of slaughter age compared to full carcass dissections (considered the gold standard). Additionally, alternative postmortem dissection procedures were investigated...
November 16, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29143908/the-hp10-taenia-monoclonal-antibody-based-elisa-detects-a-similar-protein-in-the-vesicular-fluid-of-taenia-hydatigena
#13
Maria M Cortez, Glenda C Rojas, R Michael E Parkhouse
Diagnosis of Taenia solium cysticercosis in endemic rural communities depends on serological tests, as typically there is no access to imaging facilities. The HP10 antigen ELISA (HP10 Ag ELISA), which detects a high molecular weight secreted protein of viable metacestodes, has been employed for the diagnosis of both human and porcine cysticercosis in such communities. In this communication, we formally demonstrate that the HP10 Ag ELISA, already known to function for the detection of T. saginata and T. solium cysticercosis, also detects a similar high molecular weight antigen of T...
November 16, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29122002/a-european-network-for-food-borne-parasites-euro-fbp-meeting-report-on-analytical-methods-for-food-borne-parasites-in-human-and-veterinary-diagnostics-and-in-food-matrices
#14
Christian Klotz, Barbara Šoba, Miha Skvarč, Sarah Gabriël, Lucy J Robertson
Food-borne parasites (FBPs) are a neglected topic in food safety, partly due to a lack of awareness of their importance for public health, especially as symptoms tend not to develop immediately after exposure. In addition, methodological difficulties with both diagnosis in infected patients and detection in food matrices result in under-detection and therefore the potential for underestimation of their burden on our societies. This, in consequence, leads to lower prioritization for basic research, e.g. for development new and more advanced detection methods for different food matrices and diagnostic samples, and thus a vicious circle of neglect and lack of progress is propagated...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29055271/neurocysticercosis-as-an-infectious-acquired-epilepsy-worldwide
#15
REVIEW
Doodipala Samba Reddy, Randy Volkmer
Aside from brain injury and genetic causes, there is emerging information on brain infection and inflammation as a common cause of epilepsy. Neurocysticercosis (NCC), the most common cause of epilepsy worldwide, is caused by brain cysts from the Taenia solium tapeworm. In this article, we provide a critical analysis of current and emerging information on the relationship between NCC infection and epilepsy occurrence. We searched PubMed and other databases for reports on the prevalence of NCC and incidence of epilepsy in certain regions worldwide...
November 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29036211/orally-administered-taenia-solium-calreticulin-prevents-experimental-intestinal-inflammation-and-is-associated-with-a-type-2-immune-response
#16
Fela Mendlovic, Mayra Cruz-Rivera, Jose Alfredo Diaz-Gandarilla, Marco Antonio Flores-Torres, Guillermina Avila, Maria Perfiliev, Ana Maria Salazar, Lourdes Arriaga-Pizano, Patricia Ostrosky-Wegman, Ana Flisser
Intestinal helminth antigens are inducers of type 2 responses and can elicit regulatory immune responses, resulting in dampened inflammation. Several platyhelminth proteins with anti-inflammatory activity have been reported. We have identified, cloned and expressed the Taenia solium calreticulin (rTsCRT) and shown that it predominantly induces a type 2 response characterized by IgG1, IL-4 and IL-5 production in mice. Here, we report the rTsCRT anti-inflammatory activity in a well-known experimental colitis murine model...
2017: PloS One
https://www.readbyqxmd.com/read/29033926/micrornas-in-taenia-solium-neurocysticercosis-insights-as-promising-agents-in-host-parasite-interaction-and-their-potential-as-biomarkers
#17
REVIEW
Renzo Gutierrez-Loli, Miguel A Orrego, Oscar G Sevillano-Quispe, Luis Herrera-Arrasco, Cristina Guerra-Giraldez
MicroRNAs (miRNAs) are short, endogenous, non-coding, single-stranded RNAs involved in post-transcriptional gene regulation. Although, several miRNAs have been identified in parasitic helminths, there is little information about their identification and function in Taenia. Furthermore, the impact of miRNAs in neurocysticercosis, the brain infection caused by larvae of Taenia solium is still unknown. During chronic infection, T. solium may activate numerous mechanisms aimed to modulate host immune responses...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29032785/two-glutathione-transferase-isoforms-isolated-from-juvenile-cysts-of-taenia-crassiceps-identification-purification-and-characterization
#18
G Maldonado, G Nava, A Plancarte
We identified and characterized the first two glutathione transferases (GSTs) isolated from juvenile cysts of Taenia crassiceps (EC 2.5.1.18). The two glutathione transferases (TcGST1 and TcGST2) were purified in a single-step protocol using glutathione (GSH)-sepharose chromatography in combination with a GSH gradient. The specific activities of TcGST1 and TcGST2 were 26 U mg-1 and 19 U mg-1, respectively, both at 25°C and pH 6.5 with 1-chloro-2,4-dinitrobenzene (CDNB) and GSH as substrates. The K m(CDNB) and K cat(CDNB) values for TcGST1 and TcGST2 (0...
October 16, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/29020381/antibody-banding-patterns-of-the-enzyme-linked-immunoelectrotransfer-blot-and-brain-imaging-findings-in-patients-with-neurocysticercosis
#19
Gianfranco Arroyo, Silvia Rodriguez, Andres G Lescano, Karen A Alroy, Javier A Bustos, Saul Santivañez, Isidro Gonzales, Herbert Saavedra, E Javier Pretell, Armando E Gonzalez, Robert H Gilman, Victor C W Tsang, Hector H Garcia
Background: The enzyme-linked immunoelectrotransfer blot (EITB) assay is the reference serological test for neurocysticercosis (NCC). A positive result on EITB does not always correlate with the presence of active infections in the central nervous system (CNS), and patients with a single viable brain cyst may be EITB negative. Nonetheless, EITB antibody banding patterns appears to be related with the expression of 3 protein families of Taenia solium, and in turn with the characteristics of NCC in the CNS (type, stage, and burden of viable cysts)...
January 6, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29016332/porcine-cysticercosis-possible-cross-reactivity-of-taenia-hydatigena-to-gp50-antigen-in-the-enzyme-linked-immunoelectrotransfer-blot-assay
#20
Claudio Muro, Luis A Gomez-Puerta, Robert H Flecker, Ricardo Gamboa, Percy Vilchez Barreto, Pierre Dorny, Victor C W Tsang, Robert H Gilman, Armando E Gonzalez, Hector H Garcia Lescano, Seth E O'Neal, For The Cysticercosis Working Group In Peru
The lentil lectin glycoprotein enzyme-linked immunoelectrotransfer blot (LLGP EITB, reported sensitivity 99% and specificity 100%) is used as a serologic marker of exposure to Taenia solium in pigs. However, only a limited number of parasites have been evaluated for cross reactivity. Pigs may host other related cestode infections, including Taenia hydatigena, which have not been formally evaluated for cross-reactions. We investigated a corral in Tumbes, Peru, a region where a cysticercosis elimination demonstration project was completed in 2012...
October 2, 2017: American Journal of Tropical Medicine and Hygiene
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