Taenia Solium Research Articles

Intestinal Helminth Infections in Ghanaian Children from the Ashanti Region between 2007 and 2008-A Retrospective Cross-Sectional Real-Time PCR-Based Assessment.

In spite of ongoing eradication programs, helminth infections are still a medical issue in Ghana. For follow-up assessments on the decline of regional helminth infections, historic baseline prevalence values obtained with standardized diagnostic procedures can be helpful. In this retrospective cross-sectional study, real-time PCR targeting the nematodes Ancylostoma spp. (ITS2), Ascaris lumbricoides (ITS1), Enterobius vermicularis (ITS1), Necator americanus (ITS2), Strongyloides stercoralis (18S rRNA) and Trichuris trichiura (18S rRNA), the trematodes Schistosoma spp. (ITS2) as well as the cestodes Hymenolepis nana (ITS1), Taenia saginata (ITS1) and Taenia solium (ITS1) was applied with 2046 DNA eluates from stool samples of Ghanaian children from the Ashanti region collected between 2007 and 2008 in order to retrospectively define prevalence values. The overall prevalence was low with 3.8% (n = 77) and only 0.1% (n = 2) double infections with helminths were recorded. The three most frequently detected enteric helminth species comprised 2% S. stercoralis (n = 41), 0.8% H. nana (n = 16), and 0.7% N. americanus (n = 14), while only sporadic infection events were recorded for other helminth species comprising 0.1% E. vermicularis (n = 2), 0.1% Schistosoma spp. (n = 2), 0.1% T. saginata (n = 1) and 0.1% T. trichiura (n = 1). A. lumbricoides, Ancylostoma spp. and T. solium were not detected at all. In conclusion, the retrospective assessment suggests a low prevalence of enteric helminth infections in Ghanaian children from the Ashanti Region within the assessment period between 2007 and 2008.

Characteristics of people with epilepsy and Neurocysticercosis in three eastern African countries-A pooled analysis.

Neurocysticercosis (NCC), a zoonotic disease caused by the pork tapeworm T. solium, represents one of the most common causes of secondary epilepsy but remains often undiagnosed due to lack of awareness and diagnostic facilities. We pooled data from four cross-sectional studies on epilepsy and NCC in eastern Africa. Study sites were in Uganda, Malawi and in Tanzania (Dar es Salaam and Haydom). The study in Uganda and Malawi were community-based, the two studies in Tanzania were hospital-based. The same questionnaire was used for assessment of clinical characteristics of patients with epilepsy. Computed tomography (CT) scans and serological testing were performed in order to diagnose NCC. Overall, 1,179 people with epilepsy were included in our analysis. Of those, 941 PWE underwent CT scanning and were pooled for NCC analysis. Seventy patients were diagnosed with NCC, but NCC prevalence differed considerably between sites ranging from 2.0% (95%CI 0.4% to 3.6%) in Dar es Salaam to 17.5% (95%CI 12.4% to 22.6%) in Haydom. NCC prevalence did not show any association with sex but increased with age and was higher in rural than urban settings. In addition, being a farmer, non-Muslim, eating pork and living with pigs close by was associated with a higher NCC prevalence. PWE with NCC experienced their first epileptic seizure around 3 years later in life compared to PWE without NCC and their epileptic seizures seemed to be better controlled (p<0.001). There was no difference between focal onset seizures and focal signs on neurological examination in both groups (p = 0.49 and p = 0.92, respectively). The rT24H-EITB had a sensitivity for the detection of NCC of 70% (95% confidence interval [CI] 51 to 84%), the LLGP of 76% (95%CI 58 to 89%) and the antigen ELISA of 36% (95% CI 20 to 55%). NCC is prevalent among PWE in eastern Africa, although it may not be as common as previously stated. Demographic characteristics of PWE with NCC differed from those without NCC, but semiological characteristics and results on neurological examination did not differ compared to PWE without NCC. Interestingly, seizures seemed to be less frequent in PWE with NCC. Being aware of those differences and similarities may help triaging PWE for neuroimaging in order to establish a diagnosis of NCC.

Neurological sequelae in a patient with previous neurocysticercosis

Introduction Teniasis and cysticercosis are caused by the platelminth Taenia solium, a parasite that has in its cycle the pig and man. Teniasis occurs with the ingestion of raw or undercooked contaminated pork containing cysticercus. On the other hand, human cysticercosis occurs through ingestion of T. solium eggs through fresh vegetables, raw meat or contaminated water, in the body, the larvae migrate and acquire the cystic form, usually in the host's muscle tissue.Neurocysticercosis (NCC) develops when the invasion of the larvae occurs in the human central nervous system, found in the nervous tissue or in the intraventricular, subarachnoid, and spinal cord spaces, where there is circulation of CSF, leading to different clinical manifestations and prognosis. Objective To report the case of a patient with NCC with neurological complications at IIER. Case description Female, 37 years old, carrier of Diabetes Mellitus type 2 (DM2), migraine and structural epilepsy. She has a previous history of rheumatic fever in childhood and NCC since 2001, contracted when she lived in the interior of Bahia where she raised pigs and ate this meat, treated at IIER in May/2019. A headache associated with absence and vertigo crises began in October/2020 as consequences of NCC, reasons for which the patient was hospitalized and later referred to the neurology outpatient clinic, after CSF analysis without evident alterations.The patient was admitted to the IIER with a history of intermittent vertigo for 2 days and shooting headache in the right frontal region of the skull, in addition to the return of absence seizures until then extinct since the last hospitalization in October/2020, accompanied by the neurologist physician who increased valproic acid from 1.25g to 1.5g a day, also reported that this time, presents very significant worsening of vertigo. (To see the complet abstract, please, check out the PDF.)

The role of cooking practices in the transmission of the foodborne parasite Taenia solium: A qualitative study in an endemic area of Southern Tanzania.

The pork tapeworm Taenia solium is a zoonotic food-borne parasite endemic in many developing countries causing human cysticercosis and taeniosis as well as porcine cysticercosis. It mainly affects the health of rural smallholder pig farmers and their communities, resulting in lower health status, reduced pork quality, and economic loss due to condemnation of pigs or low pricing of pork. This qualitative study aimed to identify key food related practices linked to consumption of pork at village level, of importance for transmission of taeniosis. We used an interpretivist-constructivist paradigm in a multiple case study of exploratory qualitative research design. Data was acquired through guided and probing interviews with 64 pork cooks, and 14 direct observations in four villages in a T. solium endemic area of Mbeya Region in the Southern Highlands of Tanzania. The study showed that the informants were members of communities of practice through their pork cooking practices, one community of practice for the restaurant cooks and one for the home cooks, learning, sharing, and distributing their cooking skills. Furthermore, the analysis showed that the pork cooks generally had some awareness of there being something undesirable in raw pork, but they had very diverse understandings of what it was, or of its potential harm. Major potential transmission points were identified in restaurants and in home kitchens. It appears that the pork cooks act according to socio-cultural and economic factors guiding them in their actions, including pressure from customers in restaurants, the family values of tradition in the home kitchens, and the culturally guided risk perception and appraisal. These practices might generate potential transmission points. Future research on interventions aimed at preventing the spread of T. solium taeniosis should recognise the importance of tradition and culture in risky food practices.

Non-local validated parametrization of an agent-based model of local-scale Taenia solium transmission in North-West Peru.

The pork tapeworm, Taenia solium, is the cause of a preventable zoonotic disease, cysticercosis, affecting both pigs and humans. Continued endemic transmission of T. solium is a major contributor of epilepsy and other neurologic morbidity, and the source of important economic losses, in many rural areas of developing countries. Simulation modelling can play an important role in aiding the design and evaluation of strategies to control or even eliminate transmission of the parasite. In this paper, we present a new agent based model of local-scale T. solium transmission and a new, non-local, approach to the model calibration to fit model outputs to observed human taeniasis and pig cysticercosis prevalence simultaneously for several endemic villages. The model fully describes all relevant aspects of T. solium transmission, including the processes of pig and human infection, the spatial distribution of human and pig populations, the production of pork for human consumption, and the movement of humans and pigs in and out in several endemic villages of the northwest of Peru. Despite the high level of uncertainty associated with the empirical measurements of epidemiological data associated with T. solium, the non-local calibrated model parametrization reproduces the observed prevalences with an acceptable precision. It does so not only for the villages used to calibrate the model, but also for villages not included in the calibration process. This important finding demonstrates that the model, including its calibrated parametrization, can be successfully transferred within an endemic region. This will enable future studies to inform the design and optimization of T. solium control interventions in villages where the calibration may be prevented by the limited amount of empirical data, expanding the possible applications to a wider range of settings compared to previous models.

57-Year-Old Man With Headache, Vomiting, and Gait Instability

57-Year-Old Man With Headache, Vomiting, and Gait Instability

Porcine Cysticercosis Sero-prevalence and Factors Associated with its Occurrence in Southern Highlands, Tanzania

Porcine cysticercosis is endemic in Tanzania, especially in the Southern Highlands, Central areas and Northern Highlands regions of the country. It is a condition that reduces pork quality and suitability for human consumption and hence affecting public health and the pig industry. The prevalence and possible associated factors for porcine cysticercosis occurrence were investigated to assist in the planning for sustainable control measures. This study was conducted in three wards of Iringa region, southern Tanzania. A blood sample was collected from 346 pigs in 88 households and analysed using an enzyme-linked immunosorbent assay (ELISA), to detect Taenia solium antigens (Ag). A questionnaire administered to farmers and an observational checklist tool assisted the researcher in collecting household information on pig management, sanitation and hygiene practices. On average, 22.3±3.44 per cent of pigs was seropositive for porcine cysticercosis in the three wards, and 53.4 per cent of the surveyed households had at least one seropositive pig. Statistically, porcine cysticercosis was associated with the scavenging pig rearing method (OR=2.426; p≤0.05) and poor quality pig housing (OR=1.75; p≤0.05). This means that scavenging pigs and those living in poor-quality pens had two times higher chances of being infected. Having more than half studied pig units with positive case(s) indicates limited inputs in pig feeding and sheltering thus exposing them to infection vulnerability. The poor-quality pens allowed pigs to escape and/or scavenge on T. solium eggs contaminated environment. Training and sensitising on improved pig management using locally available resources is essential. Also emphasising regular latrine use, hygiene and sanitation practices can support control.

A review on the biological food hazards found in restaurants

Biological food hazards are identified through the contamination of food by microorganisms which can be found in the air, food, water, animals, and in the human body. There are many different types of microorganisms such as, bacteria, viruses, parasites and fungi all of which are influenced by many factors that would lead to the likelihood of contamination of food. As long as conditions are suitable, almost all food can harbor some kind of biological hazard. The results of this study were done descriptively and placed into adequate tables. The results included six common pathogenic bacteria; Campylobacter jejuni, Listeria monocytogenes, Escherichia coli, Clostridium perfringens, Staphylococcus aureus and members of the Salmonella spp. They were found to be in wide variety of foods inclusive of fruits, vegetables, seafood, meats, milk and eggs. Six common food parasites, they include three protozoans (Toxoplasma gondii, Giardia intestinalis and Cryptosporidium parvum), one roundworm (Trichinella spiralis) and two tapeworms (Taenia saginata and Taenia solium), the beef and pork tapeworm, respectively. Five common foodborne viruses associated with restaurants: Hepatitis A virus (HAV), Hepatitis E virus (HAE), Rotavirus, Norovirus and Sapovirus and four common mycotoxins that primarily affect humans through the consumption of contaminated food are shown. They are the aflatoxins, ochratoxin A, patulin and the trichothecenes (deoxynivalenol, nivalenol). More studies are needed on these biological hazards with regards to their epidemiology especially in the less developed countries, in order to better understand their effects.

Global variation in force-of-infection trends for human Taenia solium taeniasis/cysticercosis

Infection by Taenia solium poses a major burden across endemic countries. The World Health Organization (WHO) 2021-2030 Neglected Tropical Diseases roadmap has proposed that 30% of endemic countries achieve intensified T. solium control in hyperendemic areas by 2030. Understanding geographical variation in age-prevalence profiles and force-of-infection (FoI) estimates will inform intervention designs across settings. Human taeniasis (HTT) and human cysticercosis (HCC) age-prevalence data from 16 studies in Latin America, Africa, and Asia were extracted through a systematic review. Catalytic models, incorporating diagnostic performance uncertainty, were fitted to the data using Bayesian methods, to estimate rates of antibody (Ab)-seroconversion, infection acquisition and Ab-seroreversion or infection loss. HCC FoI and Ab-seroreversion rates were also estimated across 23 departments in Colombia from 28,100 individuals. Across settings, there was extensive variation in all-ages seroprevalence. Evidence for Ab-seroreversion or infection loss was found in most settings for both HTT and HCC and for HCC Ab-seroreversion in Colombia. The average duration until humans became Ab-seropositive/infected decreased as all-age (sero)prevalence increased. There was no clear relationship between the average duration humans remain Ab-seropositive and all-age seroprevalence. Marked geographical heterogeneity in T. solium transmission rates indicate the need for setting-specific intervention strategies to achieve the WHO goals.

Cysticercosis of cheek as a rare presentation: case report and review of literature

BackgroundCysticercosis is caused by parasitic infestation of larval stage of pork tapeworm (Taenia solium). It is a result of accidental ingestion of contaminated water and food from eggs of tape worm due to poor sanitation. Pigs serve as intermediate host. The most common sites of cysticercosis are the muscles, heart, and liver but sites such as the tongue, buccal mucosa, cheek, or floor of mouth are rare.Case presentationA 10-year-old male patient presented to outpatient clinic of ENT department with gradually progressive swelling of right cheek. Patient has been managed with surgical excision of the cyst.ConclusionCysticercosis can be a differential diagnosis for painless swelling at cheek.

Increased iron uptake in the bladder wall of racemose cysts of Taenia solium

Racemose neurocysticercosis is an aggressive infection caused by the aberrant expansion and proliferation of the bladder wall of the Taenia solium cyst within the subarachnoid spaces of the human brain. The parasite develops and proliferates in a microenvironment with low concentrations of growth factors and micronutrients compared to serum. Iron is important for essential biological processes, but its requirement for racemose cyst viability and proliferation has not been studied. The presence of iron in the bladder wall of racemose and normal univesicular T. solium cysts was determined using Prussian blue staining. Iron deposits were readily detected in the bladder wall of racemose cysts but were not detectable in the bladder wall of univesicular cysts. Consistent with this finding, the genes for two iron-binding proteins (ferritin and melanotransferrin) and ribonucleotide reductase were markedly overexpressed in the racemose cyst compared to univesicular cysts. The presence of iron in the bladder wall of racemose cysts may be due to its increased metabolic rate due to proliferation.

Neurocysticercosis Complicating Pregnancy.

Infection with the pork tapeworm can result in neurocysticercosis caused by infestation of central nervous system tissues by the parasite cysts. Parenchymal brain infection can cause symptoms from mass effect that include headache, seizures, confusion, and even coma. Our objective was to describe the clinical course of neurocysticercosis infections in pregnant women. This was a case series that described clinical findings and pregnancy outcomes of women diagnosed with neurocysticercosis from 1994 through 2016 at a single institution. Their medical records were reviewed, cranial computed tomography and magnetic resonance imaging scans were assessed, and the infections were classified according to the criteria of the 2018 Infectious Diseases Society of America and the American Society of Tropical Medicine and Hygiene. Overall, 37 pregnant women with neurocysticercosis were identified. Of the 37 women, 32 were symptomatic, and 16 each had severe headaches or new-onset seizures or other neurologic sequelae. Some of these women had multiple symptoms. Others were diagnosed when neuroimaging was done for a history of neurocysticercosis or evaluation of a preexisting seizure disorder. The most common treatment was with anthelmintics-albendazole, praziquantel, or both-usually given with anticonvulsants and corticosteroids to decrease inflammation. There were eight women in whom invasive neurosurgical procedures were performed, usually for hydrocephaly. Overall, 32 healthy neonates were born at term, and there was one preterm delivery at 34 weeks of gestation. The four pregnancy losses included two molar pregnancies, one anembryonic miscarriage, and a 23-week stillbirth of a pregnancy complicated by preeclampsia with severe features. Neurocysticercosis in pregnant women may be asymptomatic or result in headaches, seizures, confusion, nausea and vomiting, altered mental status, or obtundation. Anthelmintic treatment is usually successful, but in some women neurosurgical procedures are necessary to relieve obstructive hydrocephaly.

A scoping review of burden of disease studies estimating disability-adjusted life years due to Taenia solium.

BackgroundTaenia solium is the most significant global foodborne parasite and the leading cause of preventable human epilepsy in low and middle-income countries in the form of neurocysticercosis.ObjectivesThis scoping review aimed to examine the methodology of peer-reviewed studies that estimate the burden of T. solium using disability-adjusted life years.Eligibility criteriaStudies must have calculated disability-adjusted life years relating to T. solium.Charting methodsThe review process was managed by a single reviewer using Rayyan. Published data relating to disease models, data sources, disability-adjusted life years, sensitivity, uncertainty, missing data, and key limitations were collected.Results15 studies were included for review, with seven global and eight national or sub-national estimates. Studies primarily employed attributional disease models that relied on measuring the occurrence of epilepsy before applying an attributable fraction to estimate the occurrence of neurocysticercosis-associated epilepsy. This method relies heavily on the extrapolation of observational studies across populations and time periods; however, it is currently required due to the difficulties in diagnosing neurocysticercosis. Studies discussed that a lack of data was a key limitation and their results likely underestimate the true burden of T. solium. Methods to calculate disability-adjusted life years varied across studies with differences in approaches to time discounting, age weighting, years of life lost, and years of life lived with disability. Such differences limit the ability to compare estimates between studies.ConclusionsThis review illustrates the complexities associated with T. solium burden of disease studies and highlights the potential need for a burden of disease reporting framework. The burden of T. solium is likely underestimated due to the challenges in diagnosing neurocysticercosis and a lack of available data. Advancement in diagnostics, further observational studies, and new approaches to parameterising disease models are required if estimates are to improve.

Challenges in the Diagnosis of Taenia solium Cysticercosis and Taeniosis in Medical and Veterinary Settings in Selected Regions of Tanzania: A Cross-Sectional Study.

Background Taenia solium (neuro) cysticercosis/taeniosis (TSCT) is a zoonotic disease complex. There is a perceived inefficient diagnosis of infections by either form, the adult pork tapeworm (taeniosis) and the larval stage of it (cysticercosis), in low-income settings, including Tanzania. This study aimed at identifying potential gaps around TSCT diagnosis and knowledge of primary healthcare providers (officers in charge (OICs) of primary healthcare facilities (PHFs)) and veterinarians (meat inspectors (MIs)) on various aspects of TSCT disease complex and addressing effective disease control in Tanzania. Methodology. A cross-sectional study was conducted between January and April 2020 in Manyara, Dodoma, Ruvuma, Iringa, and Arusha regions in Babati, Mbulu, Kongwa, Mbinga, and Nyasa districts. We interviewed 152 OICs of PHFs and 108 MIs using a structured questionnaire and 33 medical and veterinary officers from level I healthcare facilities and district livestock offices, respectively, from selected study districts to the respective ministerial level using key informant interviews. Results Quantitative data revealed inadequate microscopic diagnostic facilities (54.6%) and personnel (100%) for taeniosis diagnosis in PHFs (n = 152). Approximately 81.2% of MIs compared with only 42.1% of OICs of PHFs scored above average regarding T. solium cysticerci knowledge. Nevertheless, 61.2% of OICs of PHFs compared with only 42.6% of MIs scored above average regarding the adult T. solium tapeworm knowledge. Qualitative data revealed inadequate availability of advanced diagnostic facilities (neuroimaging) and trained personnel for specific diagnosis of TSCT with a focus on neurocysticercosis (NCC) in secondary and tertiary healthcare facilities. Inadequately number of qualified MIs, slaughter slabs, and resource facilitation challenged porcine cysticercosis diagnosis. Conclusion It is concluded that diagnostic capacity and knowledge of OICs of PHFs and MIs regarding TSCT are insufficient in both medical and veterinary sectors. A One Health approach should be adopted to improve TSCT diagnostic capacity and practitioners' knowledge in both medical and veterinary sectors.

Prevalence of intestinal parasitic infection among school children in Kirtipur Municipality, Kathmandu

Intestinal parasitic infections are a major cause of morbidity in developing countries including Nepal. Most common intestinal parasites reported in Nepal are Ascaris lumbricoides, Hymenolepis nana, Hookworm, Trichuris trichiura, Giardia lamblia and Entamoeba histolytica. This study aimed to find out the prevalence of various intestinal parasitic infections among school children in Kirtipur Municipality, Kathmandu. A cross-sectional observational study was carried out with prepared questionnaire and stool examination between October to November, 2021. Altogether, 409 stool samples were randomly collected from different schools and examined by direct smear method. Out of 409 stool samples, 73 (17.8%) were positive and 336 (82.1%) were negative. Among positive cases, helminthic infection was seen in 45 (11.0%) and protozoan infection was found in 28 (6.8%). Altogether eight species of intestinal parasites were detected, the most common was A. lumbricoides (34.2%), followed by protozoa G. lamblia (23.3%), E. histolytica (15.1%), T. trichiura (10.96%), Hookworm (6.8%), Enterobius vermicularis (4.11%), Taenia solium (4.11%) and H. nana (1.37%) respectively. Study showed that, there was 63 (86.30%) single infections, 9 (12.33%) double infections and 1 (1.37%) multiple infection. The present study reveals that intestinal parasites are abundant among students of Kirtipur Municipality, Kathmandu. The situation strongly calls for the use of control measures including treatment of infected individuals, improvement of health status of infected students by health education, public health awareness and also develop the health care facilities and aware the people for the utilization of health services.

Asymptomatic isolated intramuscular cysticercosis in diabetic patient: a case report

Cysticercosis is an endemic disease in multiple areas of the world, caused by ingestion of embryonated eggs of Taenia solium. We reported a case of a 66-year old diabetic male presenting with decrease of consciousness and “rice grain” calcification in both hemithorax and neck soft tissue region, without findings of cysticercosis in computed tomography (CT) scan. Cysticercosis most commonly affects the central nervous system, causing neurocysticercosis (NCC), while solitary intramuscular cysticercosis without involvement of the central nervous system is rare. Treatment of cysticercosis is indicated for symptomatic patients, including NCC surgery is indicated in patients with neurovascular compromise caused by growth of cyst. Recognizing the signs and symptoms of cysticercosis is crucial for diagnosis and treatment in endemic areas where Taenia solium is prevalent.

Knowledge, attitudes and practices related to Taenia solium cysticercosis and taeniasis in Tanzania

BackgroundTaenia solium cysticercosis/taeniasis (TSCT) is reported to be endemic in pig producing areas around the world, causing significant disease burden and economic losses.MethodsThis cross-sectional study aimed at assessing Knowledge, Attitudes and Practices (KAP) regarding TSCT in four districts, namely Mbulu, Mpwapwa, Mbinga, and Rungwe in Tanzania. Data on KAP were collected through questionnaire-based interviews and household infrastructure observations.ResultsKnowledge about porcine cysticercosis was good, particularly among pig keepers across the districts. Many participants had heard about the pork tapeworm (T. solium taeniasis), and the knowledge about signs/symptoms and treatment was fair, but the means of transmission and prevention measures were often unknown. Whilst most participants were familiar with epilepsy, no one knew anything about human cysticercosis and the link between cysticercosis and epileptic seizures. A similar trend is reflected through the attitudes toward the low risk perception of cysticercosis infection. Not surprisingly, the risk perception of the infection with the pork tapeworm was low too. Many participants reported not washing their hands before eating or after using the toilet which highlights potential risks for the development of human cysticercosis. Albeit nearly every participant reported using the toilet always, household observations revealed that toilets were either lacking or had no complete walls. Generally, household observations revealed a discrepancy between questionnaire answers on the one hand and the availability of toilet and handwashing facilities and the confinement of pigs on the other hand.ConclusionThis study demonstrates knowledge gaps and adverse practices which may hinder and/or slow down the control/elimination of T. solium in endemic countries. The study results are also useful for appropriate designing of TSCT health interventions that need to be planned carefully, taking into account the local context and designing TSCT in partnership with the local communities from the beginning to the end applying a One Health approach to allow the possible sustained and best impacts.Graphical

​Molecular Detection and Phylogenetic Analysis of the Genotype of Larval Cestode Cysticercus cellulosae of Pigs and Taenia solium of Man

Background: Porcine cysticercosis, caused by Cysticercus cellulosae a larval stage of adult Taenia solium, is a zoonotic parasitic disease where pigs harbour intermediate stage and human being acts as a definite host. The people of north eastern region of India are mostly non-vegetarian and consumption of pork is very much preferred by the people of this region. Hence,it is essential to detect C. cellulosae infections in pork. But traditional method of detection of C. cellulosae by post mortem examination of pork has disadvantages like need of expert and may be over lookedin case of light infections. Molecular diagnosis have been reported to be highly specific and sensitive for its diagnosis. Keeping in view of the above, the present study on molecular detection of larval cestode C. cellulosae of pigs was undertaken. A study on phylogenetic relation of C. cellulosae of pigs or human Taenae solium of this region was done to know its relation with other parts of the world, as not yet done so far. Methods: A total of 654 pig carcasses in 17 market places of three prime districts of state Arunachal Pradesh, India were examined to detect Cysticercus cellulosae of pigs. The cysticerci samples were obtained manually from the infected muscles and organs of the infected pigs that were preserved in phosphate buffer saline until DNA extraction. Stool samples of human patients who attended out-patient department (OPD) of Community Health Centers, Nursing homes and District etc. of study area of Aunachal Pradesh, India were collected randomly and examined by salt flotation technique for the presence of T. solium eggs. The segments of tapeworm voided by patientswere then identified for species identification and T. solium segments were collected in normal saline solutions (NSS) after clearing the debris and faecal materials. Genomic DNA extraction from 3-4 numbers of cysticerci and T. solium segments collected from affected human being were extractedusing a spin column kit (D Neasy tissue kit: QUIGEN).The technique polymerase chain reaction (PCR) with published primers were used for molecular detection of C. cellulosae and to get molecular (PCR) products of T. solium for further study. The mitochondrial gene cytochrome b oxidase subunit was amplified by PCR. The PCR products were purified, sequenced and phylogenetic tree was constructed using the neighbor-joining method. Result: The present study recorded a PCR amplification of cytochrome b oxidase genes with a definite product size of 1068 bp from DNA extracted from C. cellulosae and T. solium. The product size obtained from C. cellulosae will be helpful for meat inspection by molecular detection of C. cellulosae infections in pork. The present finding signifies that the same genomic isolate of both the larval cestode and adult parasite of T. solium is prevailing in the study areas. The neighbors-joining phylogenic tree shows close similarity of the present isolates with that prevailing in other South East Asian countries and thus it can be assumed from the present finding that the same genotypic isolate of T. solium parasite is prevalent in the whole of South East Asian region.

Characterization of Three cDNAs Obtained by Spliced Leader-PCR Screening of a Taenia solium cDNA Library

Cysticerci or metacestodes of Taenia solium cause cysticercosis, being the neurocysticercosis (NCC) the main pathology. The characterization of genes is essential for the knowledge of parasite biology, the understanding of the parasite-host relationship, and the identification of possible targets for diagnosis, treatment, and protection. The objective of this work was the molecular and bioinformatic characterization of three news cDNAs (TsTF10, TsAAP8, and TsrGAP8), obtained by spliced leader-PCR screening of a Taenia solium cDNA library. The sequences of the three cDNA were compared with the sequences in the nucleic acid and protein databases (GenBank, EMBL) and analyzed by bioinformatic programs (CDD-Search of the National Center for Biotechnology Information, Interpro of the European Bioinformatics Institute, Motif scan and Expert Protein Analysis System of the Proteomics Server from Swiss Institute of Bioinformatics). Considering the high identities with similar molecules of related helminths (Taenia asiatica, Echinococcus granulosus, Echinococcus multilocularis, and Hymenolepis diminuta) and the functional domains found, the TsTF10, TsAAP8, and TsrGAP8 genes of Taenia could act as a nuclear transcription factor gamma, a putative vacuolar ATPase membrane sector associated protein and a Rho GTPase activating protein, respectively. Although few B epitopes could be predicted in the sequences, it could be relevant to evaluate them as possible candidates for diagnosis and protection in cysticercosis. The characterization and analysis of these sequences and the prediction of their possible usefulness as antigens, vaccines, or therapeutic targets contribute to the designing and planning of future studies.

Risk factors and prevalence of porcine cysticercosis and epilepsy survey among human in Ibadan, Oyo state

Taenia solium cysticercosis is a re-emerging zoonotic disease in the developing world and had been diagnosed in nonendemic regions following the migration of carriers. It is a neglected tropical disease and the leading cause of epilepsy. This work aimed to study the prevalence, risk factors of porcine cysticercosis, suitable management practice, and epilepsy survey in humans at Ibadan, Oyo state. This study was conducted from September 2018 to July 2019. 240 faecal samples collected from pigs were analysed with ethyl acetate sedimentation method. Questionnaires were administered to determine associated risk factors and occurrences of epilepsy. Faecal sample screening from the study shows a prevalence of 3.3%. Risk factors include management practice, access to clean drinking water and toilet facilities. The χ2 test of significance was significant for risk factors such as; management practice (p-value =0002), provision of water (p-value= 0.039), and toilet facilities (pvalue= 0.000). It is recommended that farmers provide clean drinking water for their pigs and keep them away from human settlement.