Human Taeniosis Research Articles

Prevalence of taeniosis in pig farming community in Andhra Pradesh, India.

Taeniosis is one of the neglected zoonoses in India. Facts on taeniosis, compared to cysticercosis are scanty in India. Hence, this study is aimed to determine the occurrence of taeniosis in human beings in Andhra Pradesh, India. A total of 1380 stool samples were collected from people associated with pig farming and or had the habit of pork eating in certain districts (n = 7) of Andhra Pradesh. Prevalence of human taeniosis was determined using microscopic examination of stool samples and proglottds. The overall prevalence of taeniosis was found to be 0.79%. Morphology of gravid segments revealed lower number of lateral branches indicating T. solium segments. Age and gender of human were not associated with the occurrence of taeniosis. The low prevalence of taeniosis in human indicates good hygiene and sanitation practices in humans, and awareness about the disease and its transmission. Further studies involving more sensitive techniques on stool and serum samples are warranted.

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.

Amplification of cestode DNA from the peri-anal region of naturally infected foxes by PCR and LAMP: proof of concept for a potential sampling strategy for diagnosing human taeniosis

The diagnosis of human taeniosis can be achieved through coproscopy, ELISA or PCR. An important limitation of these methods is the high turnaround time for stool sample collection and preparation, indicating the need for a straightforward sampling strategy. Due to the high metabolic activity and reproductive potential of Taenia spp., we hypothesise that parasite DNA (cells and eggs) present in the peri-anal region of the host can be exploited as a target for molecular diagnosis. We evaluated the feasibility of recovering parasite DNA from the peri-anal area of foxes naturally infected with Taenia spp. Before necropsy, cotton swabs were rubbed at the peri-anal region of foxes. DNA was extracted using alkaline lysis coupled with a commercial DNA isolation kit (method A) or alkaline lysis alone (method B). DNA was used in the multiplex-PCR assay (previously described and called here swab-PCR) and a novel LAMP assay detecting Taenia spp. commonly found in foxes (swab-LAMP). The results of these assays from 105 foxes were compared with the presence of intestinal helminths determined at necropsy and by the sedimentation and counting technique (SCT). The sensitivity of swab-PCR for detecting Taenia (n = 68) was 89.8% (95% CI, 77.7–96.6) and 89.5% (66.9–98.7) using methods A and B, respectively. The sensitivity of the swab-LAMP assay was 83.7% (70.3–92.7) using method A and 89.5% (66.9–98.7) with method B. We postulate that peri-anal swab sampling followed by simplified DNA extraction and LAMP might be a suitable strategy for surveillance of human taeniosis in resource-limited settings in the future.

Epidemiology of Taenia saginata taeniosis/cysticercosis: a systematic review of the distribution in central and western Asia and the Caucasus

BackgroundThe zoonotic parasite Taenia saginata transmits between humans, the definitive host (causing taeniosis), and bovines as the intermediate host (causing cysticercosis). Central and western Asia and the Caucasus have large cattle populations and beef consumption is widespread. However, an overview of the extent of human T. saginata infection and bovine cysticercosis is lacking. This review aims to summarize the distribution of T. saginata in this region.MethodsA systematic review was conducted, that gathered published and grey literature, and official data concerning T. saginata taeniosis and bovine cysticercosis in central and western Asia and the Caucasus published between January 1st, 1990 and December 31st, 2018. Where no data were available for a country within this period, published data from 1985–1990 were also accessed.ResultsFrom 10,786 articles initially scanned, we retrieved 98 full-text articles from which data were extracted. In addition, two unpublished datasets were provided on the incidence of human taeniosis. Data for human taeniosis and bovine cysticercosis were found for all countries except Turkmenistan. Human taeniosis prevalence varied from undetected to over 5.3%, with regional variations. Where bovine cysticercosis was detected, prevalences varied from case reports to 25%.ConclusionsThe public health burden of T. saginata is assumed to be small as the parasite is of low pathogenicity to humans. However, this review indicates that infection continues to be widespread and this may result in a large economic burden, due to the resources utilized in meat inspection and condemnation or processing with subsequent downgrading of infected carcasses.

Epidemiology of taeniosis, cysticercosis and trichinellosis in Iran: A systematic review.

The aim of this review was to establish the current epidemiology of taeniosis, cysticercosis and trichinellosis among humans and animals in Iran by carrying out a comprehensive assessment of published articles reporting on these foodborne zoonotic diseases across the country. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline was used in the search for relevant published articles reporting on cysticercosis, taeniosis and trichinellosis in Iran using a number of appropriate key words. The search was conducted through PubMed, Web of Science, Google Scholar, SpringerLink, SCOPUS, WHOLIS, FAO and CDC. Published scientific articles including journals, books and book chapters reporting on cysticercosis, taeniosis and trichinellosis in Iran for the period between 1967 and 2018 were selected. A total of 37 articles met the search criteria and were incorporated in this review. Of these, 10 (27%) reported on human taeniosis, 15 (40.5%) on cysticercosis (10 on Taenia saginata and five on Taenia spp. cysticercosis) and 12 (32.5%) on trichinellosis. T.saginata was implicated in all human taeniosis cases. All Taenia spp. cysticercosis cases were reported among domesticated pigs and wild animals. A case of neurocysticercosis was reported in a male patient at Shohada Hospital in Tehran. Eleven (91.7%) of the 12 studies reported on trichinellosis among wild animals, while one (8.3%) study detected anti-Trichinella IgG in 8 (2.2%) of the 364 at-risk human beings tested. Nevertheless, most of these studies were carried out in northern Iran. This review found T.saginata to be the most prevalent and of greater economic and public health significance in Iran. However, T.solium and Trichinella spp. were of little significance to human health. More studies should focus on other regions besides northern Iran.

Bovine cysticercosis and taeniosis: The effect of an alternative post-mortem detection method on prevalence and economic impact

In Europe, bovine cysticercosis (BCC) is detected by routine meat inspection (MI) at the slaughterhouse. The prevalence of BCC in Belgium based on MI is estimated at 0.23%. MI has a known low sensitivity for animals with localised infections and alternative detection techniques should be considered. A mathematical scenario-analysis model was built to determine the current prevalence of BCC in Belgium based on MI results combined with results of dissection of the predilection sites (PS) and the B158/B60 Ag-ELISA on serum of 614 carcasses found negative on MI. Additionally, the impact of the introduction of the B158/B60 Ag-ELISA at slaughter on the prevalence of BCC and taeniosis and on the economic impact related to Taenia saginata was estimated for Belgium. Data for estimating the economic impact were gathered from multiple sources within the meat and human health sectors and included value loss for infected carcasses, inspection costs, carcass destruction costs, cattle insurance costs and costs related to taeniosis (consultation physician, drugs and laboratory test). The model estimated the current prevalence of BCC to be 42.5% (95% CI: 32.4-60.7%) and the sensitivity of the MI for viable and degenerated cysticerci at only 0.54% (95% CI: 0.37-0.71%). A total of 213,344 viable cysticerci (95% CI: 122,962-386.249) were estimated to be present in the infected carcasses in one year and only 408 (95% CI: 356-464) of these were present in the carcasses detected at current MI. The annual number of human taeniosis cases is estimated at 11,000 by using the sale numbers of niclosamide in Belgium. Implementation of the Ag-ELISA at slaughter (Se = 36.37%; Sp = 99.36%) would greatly reduce the prevalence of BCC to 0.6% and the number of taeniosis cases to 89 in year 10. Unfortunately, the accompanying resulting increase in costs for the animal owners, slaughterhouses and the insurance company, would be extremely high in the first years. Cattle owners would suffer losses of up to €21 million in the first year after implementation of the Ag-ELISA (compared to an annual loss of €3.5 million in the current situation), slaughterhouses of €10 million (compared to €200,000 currently) and the insurance company of almost €6 million (compared to €2.3 million profit currently). Therefore, implementation of the Ag-ELISA might not be feasible and other options for controlling T. saginata should be investigated.

Genetic Characterization ofTaenia saginataCyst Isolates from Germany

The beef tapeworm Taenia saginata, which causes taeniosis in humans and cysticercosis in cattle, is of medical and economic importance. Understanding the parasite's genetic population structure may help to analyze transmission patterns and aid in the development of control measures. As information on sequence variability is scarce for European isolates, this study aimed to elucidate the intraspecific genetic variability of T. saginata cysts from German cattle by sequence comparison of the mitochondrial cytochrome c oxidase subunit 1 (cox1) and NADH dehydrogenase subunit 5 (nad5) genes, in relationship to sequences from other geographical origins. Cysts were collected from northern German, Swiss, and Belgian cattle. Moreover, proglottids from an adult T. saginata specimen from Palestine were included. Amplification and Sanger sequencing of the cox1 gene was successful for 57 samples (45 German, 9 Swiss, 2 Belgian, 1 Palestinian), whereas 32 sequences were obtained for the nad5 gene (21 German, 10 Swiss, 1 Palestinian). For German isolates, sequence comparison revealed minor genetic variability with two polymorphic sites and mutations in both genes. Three haplotypes with haplotype diversity of 0.088 for cox1 and 0.186 for nad5, as well as nucleotide diversities of 0.00028 and 0.00095, respectively, were observed. Comparison of the cox1 gene sequence of German isolates with other European, African, American, and Asian isolates obtained from National Center for Biotechnology Information (total of 71 sequences) raised 11 polymorphic sites and mutations as well as 10 haplotypes (haplotype diversity: 0.239; nucleotide diversity: 0.00097). Although nad5 sequence comparison comprised less sequences (N = 33), analyses revealed 11 polymorphic sites, 12 mutation sites, and 7 haplotypes (haplotype diversity: 0.335, nucleotide diversity: 0.00391), indicating a better resolution of genetic variability compared to cox1. Thus, nad5 may be particularly useful for in-depth studies on genetic divergence of T. saginata.

Epidemiology and economic impact of bovine cysticercosis and taeniosis caused by Taenia saginata in northeastern Spain (Catalonia)

BackgroundIn Catalonia (north-eastern Spain), Taenia saginata has been described in cattle but its occurrence in humans is unclear. Moreover, whether cattle acquired the infection in Catalonia or outside Catalonia and its economic impact have not been investigated. This study aimed to estimate the prevalence and spatial distribution of bovine cysticercosis in Catalonia (2008–2015), and the burden from T. saginata upon the animal and human sectors in Catalonia (2013–2015).MethodsData on cattle diagnosed with cysticercosis at meat inspection were collected and analysed. Cattle movement history was used to identify the most likely place of bovine cysticercosis infection and to investigate its spatial distribution. Data on taeniosis treatment (niclosamide and praziquantel) costs and their supply in Catalonia as well as data on patients attending primary care with diagnosis of taeniosis were collected. The financial impact associated with T. saginata due to carcasses condemned and frozen, meat inspection and human taeniosis was estimated.ResultsDuring 2008–2015, between 18 and 107 cattle were found positive for cysticercosis each year (prevalence at slaughter of 0.010%). Movement history was available for 44% of the infected cattle and in 53% of them Catalonia was identified as the place where the infection was acquired with highest probability. Two significant bovine cysticercosis clusters were detected. The number of patients diagnosed with taeniosis in primary care during the period 2013–2016 was 41–63/year. The overall economic impact of T. saginata (2013–2015) amounted to 154,903 €/year (95% CI: 113,075–196,762). Meat inspection accounted for 81.9% (95% CI: 75.8–86.2%) of the costs, followed by costs due to carcass condemnation and freezing (9.4%; 95% CI: 6.9–12.8%), and taeniosis-associated costs (8.7%; 95% CI: 6.7–11.6%). Costs due to freezing and condemnation of carcasses reached 19,442 €/year (95% CI: 17,528–21,391) (509 €/lightly infected carcass and 1,140 €/heavily infected carcass). Taeniosis-associated costs were estimated at 12,848.5 €/year (237 €/patient).ConclusionsThe public health risk of T. saginata in the area seems to be low. The economic impact due to T. saginata was mainly attributed to meat inspection. The cost due to carcass condemnation and freezing was limited compared to the revenue of the beef sector. Developing and implementing risk-based surveillance is needed to lower the costs of meat inspection. Considering cattle movements might be useful in the development of such a strategy.

Identification and Control of Sources of Taenia Solium Infection - the Attempts To Eradicate the Parasite.

Taenia solium is a parasite causing porcine cysticercosis and human taeniosis and cysticercosis, parasitic zoonoses with a serious public health and economic influence. It has been globally ranked as the top foodborne parasite by the Food and Agriculture Organisation of the United Nations (FAO) and the World Health Organisation (WHO). This parasite is transmitted mainly in countryside regions where animals are free roaming, having access to human faeces, and infected pork is widely available. More developed countries eliminated cysticercosis; nonetheless, there are insufficient data about the current endemicity status of T. solium, due to increased human migration from endemic areas. Formally submitted statistics on cysticercosis in pigs are extremely inadequate. This is the result of not reporting all cases of the disease by some countries and lack of molecular verification during identification of the parasite. There is a need to develop diagnostic tests with increased sensitivity and specificity. The purpose of the present review is to summarise current knowledge about diagnostic and control methods concerning T. solium infection. The article does not address the diagnostics of human cysticercosis, since there is a distinct medical field which should be discussed separately. The paper focuses mainly on identifying the sources of T. solium infection, presenting the methods to detect and control porcine cysticercosis and taeniosis in humans.

Identification and control of sources of Taenia solium infection – the attempts to eradicate the parasite

Abstract Taenia solium is a parasite causing porcine cysticercosis and human taeniosis and cysticercosis, parasitic zoonoses with a serious public health and economic influence. It has been globally ranked as the top foodborne parasite by the Food and Agriculture Organisation of the United Nations (FAO) and the World Health Organisation (WHO). This parasite is transmitted mainly in countryside regions where animals are free roaming, having access to human faeces, and infected pork is widely available. More developed countries eliminated cysticercosis; nonetheless, there are insufficient data about the current endemicity status of T. solium, due to increased human migration from endemic areas. Formally submitted statistics on cysticercosis in pigs are extremely inadequate. This is the result of not reporting all cases of the disease by some countries and lack of molecular verification during identification of the parasite. There is a need to develop diagnostic tests with increased sensitivity and specificity. The purpose of the present review is to summarise current knowledge about diagnostic and control methods concerning T. solium infection. The article does not address the diagnostics of human cysticercosis, since there is a distinct medical field which should be discussed separately. The paper focuses mainly on identifying the sources of T. solium infection, presenting the methods to detect and control porcine cysticercosis and taeniosis in humans.

Are we ready for Taenia solium cysticercosis elimination in sub-Saharan Africa?

The World Health Organization announced in November 2014 at the fourth international meeting on 'the control of neglected zoonotic diseases - from advocacy to action', that intervention tools for eliminating Taenia solium taeniosis/cysticercosis (TSTC) are in place. The aim of this work was to elucidate theoretical outcomes of various control options suggested for TSTC elimination in sub-Saharan Africa (SSA) over a 4-year period. Our current knowledge regarding T. solium epidemiology and control primarily builds on studies from Latin America. A simple transmission model - built on data from Latin America - has been used to predict the effect of various interventions such as mass treatment of humans, vaccination and treatment of pigs, and health education of communities, potentially leading to change in bad practices and reducing transmission risks. Based on simulations of the transmission model, even a 4-year integrated One Health approach fails to eliminate TSTC from a small community and in all simulations, the prevalence of human taeniosis and porcine cysticercosis start to rise as soon as the programmes end. Our current knowledge regarding transmission and burden of TSTC in SSA is scarce and while claiming to be tool ready, the selection of diagnostic and surveillance tools, as well as the algorithms and stepwise approaches for control and elimination of TSTC remain major challenges.

Taeniosis/Neurocysticercosis Control as a Medical Problem—A Discussion Paper

Taenia solium taeniosis is a zoonosis transmitted by cysticerci from pigs. Neurocysticercosis is a fecal-borne infection spread exclusively by T. soliumeggs in a tapeworm carrier or around. Neurocysticercosis is frequently fatal and debilitating disease and a common cause of late epilepsy. Taeniosis/neurocysticercosis (t/nc) can be prevented both by control of meat-borne zoonosis, which is a traditional responsibility of veterinarians, and by chemotherapy of human taeniosis, which is usually underestimated by medical profession. Elimination of T. solium taenosis is not only the matter of organized control projects but also of routine, daily medical and veterinary services. In order to promote more effective control by treatment of human T. solium carriers the following suggestions are proposed to be discussed: 1) accept that leaving untreated any detected human carrier of T. soliumtaeniosis, the only source of neurocysticercosis, is a medical error. This statement concerns both clinical settings and field interventions; 2) accept as the clinical and public health standards a search for T. solium carrier in any possible t/nc foci and treat both detected and suspected cases of taeniosis; 3) make the diagnosis and treatment of T. solium infections in humans widely accessible and possibly free; 4) improve easy applicable tools detecting T. solium taeniosis; 5) make modern and traditional taenicides available. There is a need to improve the stability and efficacy of niclosamide and elaborate an instruction how to avoid neurological side- effects of praziquantel; 6) include prevention of t/nc into professional training, especially in mental health, public health and primary health care professions; 7) intensify preventive education adapted to the local endemic situation.

Bovine Cysticercosis and Human Taeniosis in Adama Town, Oromia Region, Ethiopia

A cross-sectional study was conducted in cattle slaughtered at Adama municipal abattoir in southwest Shoa zone of Oromia region to estimate the prevalence of bovine cystiercosis using routine meat inspection method and questionnaire surveys were undertaken to assess the status of human taeniosis and associated risk factors. Out of 384 carcasses examined, 2.6% were to be infected with Cysticercus bovis (C. bovis). Among positive cases for C. bovis, 78% were viable while it was more prevalent in the tongue and triceps muscle (40%, 24%) than in the liver masseter muscle (10% 6%) respectively. Based on the questionnaire survey, Taenia saginata (T. saginata) is a wide spread problem in Adama town where Out of 200 respondents 44% of the respondents had contracted T. saginata at least once in the past years. The prevalence of taeniosis was significantly higher (p<0.000) in the raw meat consumers as compared to those consuming cooked meat. The annual taenicidal drug treatment cost by prescription in the study area from 2012-2014 was 378,609.66 Ethiopian birr which is equivalent to 18930.48 USD. The drug inventory clearly demonstrated the economic significance of T. saginata in the study area. Among respondents 85% of them do have a knowledge that taeniosis is a zoonotic disease transmitted through consumption of raw beef meat. In conclusion, C. bovis and T. saginata are among important health zoonotic cestodes in the study areas. Improvement in meat inspection procedures and sanitary conditions as well as public education as to decrease negligence among public should get due attention.

Prevalence of Taenia Saginata/Cysticercosis and Community Knowledge about Zoonotic Cestodes in and Around Batu, Ethiopia

A cross-sectional study on bovine cysticercosis was conducted from December 2014 to April 2015 on 384 zebu cattle slaughtered at Batu municipal abattoir to estimate the prevalence and associated risk factors. Moreover 100 residents in Batu town were randomly sampled for questionnaire survey to assess the community knowledge and public health significance of the disease. Similarly, inventory of pharmaceutical shops and collection of retrospective laboratory data of human taeniosis was made in Batu town. Out of the total 384 inspected animals, 10 animals had variable number of Cysticercus bovis giving an overall prevalence of 2.6%. Anatomical distribution of the cyst showed that the highest proportions of Cysticercus bovis cyst were observed in tongue 10 (41.66%) followed by heart 7 (29.17%), masseter 5 (20.83%) and triceps muscle 2 (8.33%). A total of 24 Cysticercus bovis were collected during the inspection; out of these, 7 (29.2%) were found to be viable cysts while 17 (70.8%) were non-viable cysts. There was no significant association between the prevalence of Cycticercus bovis and sex, origin and body condition of the cattle (p>0.05). Of the total 100 interviewed respondents, 59 (59%) had contracted T. saginata infection at least once in their life time. Human taeniosis prevalence showed significant difference with sex and occupation (p<0.05) being higher in male individuals than females (p=0.033, x2=4.524) and in butcher than people from other sectors of occupation (farmers, civil servants, merchants and students) (p=0.006, x2=14.572). 75% and 78% of respondents were aware about Taeniosis and source of infection that is raw or under cocked meat respectively. The retrospective laboratory data in two years (2014 to 2015) revealed that out of 13,591 patients stool examined, 148 (1.1%) had been positive for Taeniosis. An inventory of pharmaceutical shops during the two years revealed a total of 71,709 taenicidal drug doses worthing a total of 245,592 ETB (12,279.6 USD) were used. The finding indicates the importance of cysticercosis and taeniosis both in economic and public health aspects. Therefore, due attention should be given for awareness rising in the public and strict routine meat inspection should be undertaken to minimize the impact of this parasite.

Taenia saginatataeniosis: copro-antigen time-course in a voluntary self-infection

Human taeniosis due to Taenia saginata is cosmopolitan where beef is consumed; however, there is little or no information on the symptomatology over the early time-course of human infection. Copro-antigen detection is very useful in community screening for human taeniosis, particularly for T. solium, but there are no data on copro-antigen detection in pre-patent infection. In order to provide insight into this, a voluntary self-infection with T. saginata was undertaken and monitored over a 6-month period using a copro-antigen enzyme-linked immunosorbent assay (ELISA) that we developed using anti-T. saginata antibody based reagents. Tapeworm patency, defined as first proglottid appearance, occurred on day 86 post-infection (pi) and was followed by almost daily release of proglottids (range 1-8) until termination using praziquantel on day 180 pi. The first 10 weeks post-infection (wpi) were essentially asymptomatic, followed by main symptoms of involuntary proglottid discharge throughout the infection period, and abdominal discomfort peaking around 15-19 wpi. Copro-antigens could not be reliably detected until 2 weeks before proglottid patency but then remained highly elevated over the next 15 weeks until treatment. Copro-antigen levels reverted to negative 4 days post-treatment. This time-course study suggests that although copro-antigen ELISA is an excellent diagnostic tool for established patent infections of T. saginata, it may not be reliable for faecal antigen detection in the early infection phase prior to proglottid release for T. saginata and other human taenioses.

Bovine cysticercosis and its food safety implications in Harari People's National Regional State, eastern Ethiopia.

Taenia saginata cysticercosis is one of the zoonotic diseases that threaten food safety and food security, particularly in developing countries. A cross-sectional study was conducted to estimate the prevalence and cyst distribution in infected cattle, and food safety implications of Taenia saginata cysticercosis in Harari People's National Regional State, eastern Ethiopia. Post-mortem inspection of carcasses and organs of slaughtered cattle in Harar Municipal Abattoir, cyst viability tests and interviews with randomly selected meat consumers were undertaken. The post-mortem inspection showed that of the 898 local zebu cattle slaughtered for human consumption and examined for the presence of cysticerci of T. saginata, 19.7% (177/898; 95% CI = 17.2-22.5) harboured at least one cyst in the muscles or organs inspected. Of the edible anatomical sites with cysticerci, shoulder muscle, liver and heart together represented 65.4%, 66.0% and 65.4% respectively of relative prevalence, total cyst count and cyst viability. These edible sites are preferred above others by local people for preparation and consumption of raw or inadequately cooked meat dishes that are locally served as kurt, kitffo and dullet. The interviews revealed that among the 300 study participants, 182 (60.7%) had been infected by taeniosis at least once during the previous year and of these 99.0% had eaten raw or undercooked beef, the majority (88.3%) obtained from butchers assumed to provide officially inspected meat that was fit for consumption. This indicated that existing meat inspection processes were inadequate to prevent carcasses infected with T. saginata cysticerci from reaching consumers. The high prevalence of viable cysts in the edible parts of beef together with the widespread consumption of raw or undercooked beef indicated the importance of T. saginata cysticercosis as a food safety problem in eastern Ethiopia. The promotion of policies to upgrade existing meat inspection procedures and public education to ensure effective prevention of T. saginata taeniosis in humans were recommended.

Cysticercus bovis in Slaughtered Cattle in the Afyonkarahisar and Burdur Provinces and Its Importance from the Point of View of Public Health

This study was conducted to determine the current status of bovine cysticercosis and human taeniosis in two provinces (Afyonkarahisar and Burdur in the western part of Turkey between October 2009 and October 2011). In the study period, a total of 1684 cattle and 7644 human stool samples were examined for Cysticercus bovis, and Taeniosis, respectively. Carcasses of animals were subjected to routine meat inspection. Stool samples of humans were analysed macroscopically and microscopically including direct and formaldehyde-ether sedimentation methods. C. bovis was determined in 0.24% of cattle by postmortem examination. The prevalence of infection was found to be 0.46% in Afyonkarahisar and 0.09% in Burdur. Taenia sp. eggs were shown in 0.1% of the human stool samples. The infection rate was detected as 0.1% and 0.09% in Afyonkarahisar and Burdur, respectively. This study is characterized as a preliminary investigation which offers useful information on a public health level within a short time at a low cost. Results obtained from this study cannot be generalized to study areas in epidemiological terms, but they are useful data for the relevant geography.

Bovine cysticercosis and human taeniosis in South-west Shoa zone of Oromia Region, Ethiopia

A cross-sectional study was conducted in cattle slaughtered at Sebeta, Tulu Bolo and Weliso abattoirs in southwest shoa zone of Oromia region, Ethiopia to estimate the prevalence of bovine cystiercosis using routine meat inspection method, and questionnaire surveys were undertaken to assess the status of taeniosis and associated risk factors in human in these towns. Accordingly, out of 1216 carcasses examined, 4.6 % were found infected with Cysticercus bovis. Among the positive cases for C. bovis, 39.3 % were viable and 60.7% were non-viable cysts while it was more prevalent in the heart and tongue (39.3% and 30.4%, respectively) than in the diaphragm and liver. Out of 392 respondents, 55.1% had contracted T. saginata at least once in the past years. The prevalence was significantly higher in adults (&gt; 20 years) than youngsters (&lt; 20 years) (P&lt;0.001), in male than females (P=0.046), in Christian than Muslim community (P=0.011), in butchers and abattoir workers than in other occupation (P&lt;0.001), in illiterate than in literate and university graduates (P=0.001) and in raw meat consumers than in others (P&lt;0.01. In conclusion, bovine cysticercosis caused by C. bovis and associated human taeniosis are important problems in the study areas. Improvement in meat inspection procedures and sanitary conditions in the study areas are needed.Key words: Cysticercosis, Cattle, Human, Taeniosis, Ethiopia.

Neurocysticercosis: Clinical Aspects, Immunopathology, Diagnosis, Treatment and Vaccine Development

Neurocysticercosis (NCC) is defined as human parasitism caused by Taenia solium in its larval stage, when the parasite is located at the central nervous system of the human beings. This disease represents a serious public health problem in developing countries. Neuroimaging studies are usually abnormal, but in most cases, not pathognomonic. Serological diagnosis of NCC is made by means of tests using crude antigens or semipurified fractions of T. solium cysticerci or the use of recombinant antigens that have improved the sensitivity and specificity of the diagnosis. Treatment of NCC is based upon the use of cystocidal drugs, namely: praziquantel and albendazole. Some vaccines to prevent porcine cysticercosis are in advanced stages of investigation, but they are not to be used in humans. Nowadays, the T. solium genome sequence will allow to create a rational design of new healing and preventive drugs. A vaccine for human taeniosis use could be developed in a short term. The aim of this review is to describe the most important clinical aspects of the NCC with emphasis in immunopathology and immune diagnosis.

Diagnosis Of Taenia Solium Metacestode Infection In Pigs: A Review

Cysticercosis caused by Taenia solium metacestode, is one of the major public health disease. Infected pigs play an important role in human taeniosis and cysticercosis. Recently much progress has been made towards immunodiagnosis of T. solium metacestode infection in pigs that have improved diagnostic sensitivity and specificity at field level. DNA approaches are now being used for accurate species specific identi - fication of Taenia spp. Recent advances in diagnosis of porcine cysticercosis both antemortem and postmortem diagnostic techniques are reviewed in this article.