Prevalence and morphological characterisation of Cysticercus tenuicollis (Taenia hydatigena cysts) in sheep and goat from north India

Abstract

Taenia hydatigena is an adult parasite of dogs with the metacestode (Cysticercus tenuicollis) stage residing in ruminants and pigs. Documentation and surveillance data concerning to the prevalence and risk factors associated with the disease in India is largely lacking. In this experiment, 3,199 carcasses, including 760 sheep and 2,439 goat were examined for the presence of C. tenuicollis (T. hydatigena cysts) on post-mortem inspection at different slaughter houses/shops in northern India. Morphological analysis was also conducted on five samples from each species. Out of 3199 carcasses examined, 135 were found containing cysts of T. hydatigena indicating a prevalence of 4.22 %. Most of the cysts were present in abdominal cavity, except few which were embedded in the liver. The high prevalence of 4.83 was recorded in goats as compared to 2.23 % in sheep. Principal component analysis was applied for statistical analysis. The results of morphological analysis indicated its usefulness as a valid criterion for differentiation of T. hydatigena cysts and that there might be possibility of two different strains infecting sheep and goat.

First molecular description, phylogeny and genetic variation of Taenia hydatigena from Nigerian sheep and goats based on three mitochondrial genes

“…Although the significant differences in the number of examined Nigerian T. hydatigena isolates (from both intermediate hosts) could have influenced the outcome of the neutrality and nucleotide diversity indices, the hypothetical existence of host-specific strains which has been reported cannot be completely ruled out [28, 54, 55]…”

Caracterização das lesões parasitárias de ovinos observadas na linha de abate

“…Diversos estudos demonstram uma alta frequência de cisticercose por C. tenuicollis em frigoríficos de ovinos e caprinos (Soares et al 2012, Singh et al 2015, Khanjari et al 2015, Morais et al 2017. C. tenuicollis constitui o estágio larval de Taenia hydatigena, que possui como hospedeiros intermediários ovinos, caprinos, bovinos e suínos, e como hospedeiros definitivos cães e canídeos selvagens (Urquhart et al 1996, Taylor et al 2010.…”

“…Nesse estudo, os cistos foram observados aderidos ao omento, mesentério, cápsula do fígado e na vesícula biliar. Geralmente esses constituem os locais de predileção dos cistos de C. tenuicollis (Singh et al 2015, Barros 2016.…”

First Report on Molecular Characterization of Taenia multiceps Isolates From Sheep and Goats in Faisalabad, Pakistan

“…In this study, a molecular description of C. cerebralis isolates from sheep and goats was reported for the first time in Pakistan based on mt cox1 gene as mtDNA remains an important marker in exploring intraspecific variation due to maternal inheritance, conserved structure, higher evolution rate, high genetic divergence, and absence of recombination (64)(65)(66)(67)(68). The result demonstrates a high haplotype and low nucleotide diversity comparable to the population indices reported in Italy (Hd = 0.664, π = 0.004) (69) as well as in Egypt, where a considerable number of SNP in the cox1 gene, mostly non-parsimony informative with low genetic diversity and fewer haplotypes were reported (70).…”