Molecular characterization of<i>Cysticercus tenuicollis</i>isolates from sheep in the Nile Delta, Egypt and a review on<i>Taenia hydatigena</i>infections worldwide

Abbas, Ibrahim; El-Alfy, El-Sayed; Janecek-Erfurth, Elisabeth; Strübe, Christina

doi:10.1017/s0031182021000536

Cited by 13 publications

(11 citation statements)

References 160 publications

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“…In total, 45 datasets describing T. multiceps infections in 11 191 dogs worldwide were revealed during our search, and 639 dogs have been found infected resulting in a pooled global prevalence of 5.8% (95% CI 4.7–6.9%). The prevalence and infection intensities of T. multiceps in dogs are in general lower than that of Taenia hydatigena (Wang et al , 2006; Abbas et al , 2021). Dogs can develop immunity and become refractory to T. multiceps infections after the second or the third reinfections (Willis and Herbert, 1984).…”

Section: Resultsmentioning

confidence: 99%

Global epidemiology and molecular biology of Taenia multiceps: a comparative meta-analysis and in silico analysis study

et al. 2022

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In the present study, all published data on the epidemiology and molecular characters of Taenia multiceps were systematically collected from relevant databases (e.g. PubMed, Scopus, National Center for Biotechnology Information), and combined in various statistical and genetic analyses as a contribution to a better understanding of the epidemiology of this ubiquitous taeniid worldwide. While 5.8% of the key hosts (dogs) from various countries had T. multiceps, grey wolves displayed the highest prevalence (21.6%) among the definitive hosts. Small ruminants are the main intermediate hosts and carry the coenuri in various locations, but most commonly in the central nervous system (CNS). Cerebral coenuri were confirmed in 53% of sheep exhibiting neurological symptoms, and infected animals often had only a single coenurus in the brain. Sheep had a higher prevalence (8.8%) of CNS coenuri than goats (5.8%); however, extra-CNS coenuri were detected more frequently in goats than in sheep. In either case, the difference between sheep and goats was statistically insignificant. Analysis of 233 partial cytochrome oxidase subunit I nucleotide sections for T. multiceps revealed high haplotype and low nucleotide diversities. Fifty-one haplotypes were detected circulating in 6 geographic populations. China, Iran and Turkey had 2 major haplotypes, whereas Italy and Egypt shared 3. Haplotypes from Greece circulate worldwide, and displayed similar gene flow values when compared with the other populations. There were no distinct patterns for haplotype distribution in relation to the infected hosts or coenuri locations. The existence of genetic variants in T. multiceps was highlighted, but needs further studies.

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Section: Resultsmentioning

confidence: 99%

Global epidemiology and molecular biology of Taenia multiceps: a comparative meta-analysis and in silico analysis study

et al. 2022

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“…This was because dogs had access to pastures that were being grazed by goats and sheep and hence can contaminate pastures with their fecal matter. The overall prevalence of 35.4 and 23.3% observed in goats and sheep respectively in this study was comparable to what has been observed among goats and sheep in Pairaba, Brazil of 39% in goats and 17.4% in sheep (de Morais et al, 2017) and in Ceara of 26.2% in goats and 35% in sheep (Soares et al ., 2012) and in Uttar Pradesh, India of 27.3% in goats and 37.2% in sheep (Pathak and Gaur, 1982); in Soroti, Uganda of 42.5% in sheep and 33.3% in goats (Nyero et al ., 2014) and in Nile Delta, Egypt of 21% in sheep (Abbas et al ., 2021). More high prevalence rates have been observed among goats (53%) and sheep (79%) in eastern Ethiopia (Sissay et al , 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Much lower prevalence had been observed in north India of 4.8% in goats and 2.2% in sheep (Singh et al ., 2015), northeast Tunisia of 8.9% in goats and 2.2% in sheep (Khaled et al ., 2020) and northwest Iran of 8.9% in goats and 2.8% in sheep (Mirzaei and Rezaei, 2015). Cysticercus tenuicollis though not zoonotic does not cause serious health effects in goats and sheep but have been found to lower their productivity (Soares et al ., 2012; de Morais et al, 2017; Abbas et al ., 2021). Therefore dogs should be dewormed to get rid of adult cestode worms which shed their eggs in dogs’ feces thereby contaminating pasture grazed by livestock.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of cystic echinococcosis among livestock in pastoral and agro-pastoral areas in Uganda

Omadang,

Chamai,

Ejobi

et al. 2023

Parasitology

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Cystic echinococcosis (CE) remains a significant challenge in Uganda with precise status largely undocumented in most communities. To determine CE prevalence, post-mortem examination was done on 14 937 livestock (5873 goats, 1377 sheep, 3726 zebu cattle and 3054 Ankole cattle) slaughtered in abattoirs in the districts of Moroto in Karamoja region, Kumi in Teso region and Nakasongola and Luwero in Buganda region. The overall CE prevalence was 21.9% in sheep, 15.2% in zebu cattle, 5.5% in goats and 2.1% in Ankole cattle. Moroto district had a higher prevalence of CE than other districts with 31.3% in zebu cattle, sheep 28%, goats 29.1% and (0%) in Ankole cattle. On organ locations, the lungs were the most affected in all livestock in all the study areas. Considering cyst fertility, 33.9, 1.7 and 6.4% of Ankole cattle, sheep and zebu cattle respectively had fertile cysts in the liver while 4.5% of goats and 4% Ankole cattle had fertile cysts in the lungs. In conclusion, CE is widespread and occurs among cattle, sheep and goats in pastoral and agro-pastoral areas in Uganda. Therefore, there is an urgent need to create awareness among the communities on role of livestock in CE epidemiology and transmission.

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“…The disease can cause economic losses, and its prevalence varies among poor and developing countries (Hama et al., 2018; Sgroi et al., 2020). Cysticercosis has been documented in old‐aged sheep and goats worldwide (Al‐Mayali, 2005; Abbas et al., 2021), but it is considered rare in young lambs (Al Salihi et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

A rare case of Cysticercus tenuicollis infection in a neonate lamb: Evidence of prenatal transmission

Dehghan Rahimabadi,

Abbasi,

Shaghayegh

et al. 2023

Veterinary Medicine & Sci

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Cysticercosis develops in lambs following a Cysticercus tenuicollis infestation, which is the larval stage of Taenia hydatigena. A 7‐day‐old lamb was examined for depression, anorexia, fever (40.5°C), congested mucus membranes, reluctance to move, and a hunched back. Upon necropsy, congestion was noted in the intestines and brain, and the heart had a loose consistency. Soft and pulpy kidneys were evident coupled with watery intestinal contents. Epsilon toxin (Clostridium perfringens type D toxin) was detected using enzyme‐linked immunosorbent assay. A transparent cystic structure was incidentally found attached to the pancreas, within which a scolex was well demonstrated upon histopathology. Chronic active peritonitis was diagnosed at the cyst attachment site. C. tenuicollis was confirmed by polymerase chain reaction and genome sequencing. This report describes prenatal transmission of C. tenuicollis in the present lamb, although this condition is quite rare.

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Molecular characterization ofCysticercus tenuicollisisolates from sheep in the Nile Delta, Egypt and a review onTaenia hydatigenainfections worldwide

Abstract: Abstract

Cited by 13 publications

References 160 publications

Global epidemiology and molecular biology of Taenia multiceps: a comparative meta-analysis and in silico analysis study

Global epidemiology and molecular biology of Taenia multiceps: a comparative meta-analysis and in silico analysis study

Prevalence of cystic echinococcosis among livestock in pastoral and agro-pastoral areas in Uganda

A rare case of Cysticercus tenuicollis infection in a neonate lamb: Evidence of prenatal transmission

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