Preferential infection sites of Cysticercus bovis in cattle experimentally infected with Taenia saginata eggs

Lopes, Welber Daniel Zanetti; Santos, Thaís Rabelo dos; Soares, Vando Edésio; Nunes, Jorge L.N.; Mendonça, Rafael Paranhos de; Lima, Roberto César Pereira; Sakamoto, Cláudio Alessandro Massamitsu; Costa, Gustavo Henrique Nogueira; Soccol, Vanete Thomaz; Oliveira, Gilson Pereira de; Costa, Alvimar José da

doi:10.1016/j.rvsc.2010.04.014

Cited by 31 publications

(26 citation statements)

References 20 publications

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“…Such findings are in accordance to Scandrett et al (2009) and Lopes et al (2011) who observed low rates of infection at this site after inoculating 42 and 26 bovines with T. saginata eggs respectively. Both these results found by these authors and those from the present study considering number of cysts found in the esophagus, differ from those described in other studies.…”

Section: Discussionsupporting

confidence: 92%

“…These results were in accordance to the results found in the present study, with similar results in both assessments regarding these sites. Several studies have shown the same predilection sites regarding cysticercosis in bovines (Kebede, 2008; Kebede et al , 2009; Scandrett et al , 2009; Lopes et al , 2011). However, the serial slicing of the diaphragm and the tongues in this study, although detecting small numbers of cysts in both, showed the high levels of cysticercosis infection in the bovines assessed.…”

Section: Discussionmentioning

confidence: 85%

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Distribution ofTaenia saginatametacestodes: a comparison of routine meat inspection and carcase dissection results in experimentally infected calves

Soares

Belo

Rezende

et al. 2011

Annals of Tropical Medicine & Parasitology

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A comparison of techniques for detecting the presence of Cysticercus bovis in bovine carcasses was made by using carcass dissection and routine beef inspection guidelines. In the study, 28 calves were used after they were tested and found to be negative for the presence of anti-C. bovis serum antibodies and were inoculated orally with aliquots containing 6×104 Taenia saginata eggs. One hundred and twenty days after inoculation, the animals were slaughtered and a post mortem evaluation was done following Brazilian Federal Beef Inspection guidelines. This routine meat inspection was able to identify 71.42% of the assessed infected carcasses as being parasitized. This result implies that 28.58% of the infected carcasses would have been released as fit for human consumption since they would have been considered as free of C. bovis infection when using this method for carcass assessment. Only 3.07% of the total 2311 metacestodes present in the carcasses were identified by the conventional procedures of sanitary inspection. The assessment of different parts of the carcasses showed high infestation rates in shoulder clod (14.37%), head (11.21%), neck+chuck roll (8.05%), heart (7.75%) and top (inside) round (7.18%) which, together, were responsible for housing 48.51% of all the cysts found in the 24 beef cuts assessed. These numbers contrasted to the low incidence of cysts found in organs such as tongue (3.12%), diaphragm (1.69%) and esophagus (1.60%) which are usually described as predilection sites for the parasite.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 85%

Distribution ofTaenia saginatametacestodes: a comparison of routine meat inspection and carcase dissection results in experimentally infected calves

Soares

Belo

Rezende

et al. 2011

Annals of Tropical Medicine & Parasitology

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“…Sendo assim, Taenia saginata têm como hospedeiro definitivo o homem, que desenvolve no intestino delgado a forma adulta do parasita, enquanto que, a fase de larva deste cestódeo é encontrada nos tecidos de animais, dos quais se destacam os bovinos, seus hospedeiros intermediários (Costa et al 2012). Lopes et al (2011), afirmam que a cisticercose bovina não apresenta elevada importância clínica para a bovinocultura de corte e leite, uma vez que os animais apresentam, geralmente, infecções moderadas e com ausência de sinais. Por outro lado, estes autores enfatizam que, os prejuízos para os produtores ocorrem no abatedouro, resultado do deságio ou mesmo na condenação de carcaças com cisticercos vivos diagnosticados durante a linha de abate.…”

Section: Introductionunclassified

Prevalência, distribuição espacial e fatores de risco para cisticercose bovina no estado de São Paulo

Ferreira¹,

Revoredo

Ragazzi³

et al. 2014

Pesq. Vet. Bras.

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O presente trabalho teve como objetivos determinar a prevalência, a distribuição geográfica bem como os fatores e áreas de risco associados à cisticercose bovina no Estado de São Paulo. Foram inspecionados 34.443 animais, machos e fêmeas e com faixas etárias variando entre 18 a 60 meses. Os bovinos eram procedentes de 97 municípios do Estado de São Paulo, devidamente identificados e abatidos no período de outubro de 2010 a agosto de 2011, em um frigorífico localizado na cidade de Ipuã-SP, sob supervisão do SIF 1387. O estado de São Paulo foi dividido em núcleos regionais, e os dados dos municípios pertencentes ao respectivo núcleo, foram agrupados, conforme a Secretaria de Abastecimento e Agropecuária de São Paulo, totalizando 13 núcleos estudados. Com base nos resultados encontrados, pode-se concluir que dos 97 municípios analisados, foi possível encontrar bovinos positivos para a enfermidade em questão em 86. A prevalência média de cisticercose bovina no estado de São Paulo foi de 4,80%, sendo que os núcleos de Franca e Barretos foram os que tiveram maior número de casos da enfermidade durante o período analisado. Além disso, o maior número de casos nestes núcleos coincidiu com o menor índice de desenvolvimento humano referente à educação, com a maior área de plantio de café (núcleo de Franca) e também como a maior área de cana-de-açúcar cultivada (núcleo de Barretos) nestes locais, o que por sua vez pode indicar que a presença da mão-de-obra temporária no meio rural, aliado a aspectos socioeconômico/cultural, pode estar contribuindo para a disseminação e estabelecimento da cisticercose bovina nestas áreas.

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“…In addition, we found 12 articles containing information about the spatial distribution of BCC inside/within the states (Table 1), 13 articles describing risk factors or variables associated with BCC occurrence ( Table 2) and 4 describing the economic burden of BCC [7,22,28,30]. Furthermore, a set of 10 studies performed in Brazil were also included, regarding at least one aspect presented in discussion section, such as efficacy of chemical treatment (n = 1) [62], preferential infection sites (n = 2) [63,64], development of serological tests (n = 4) [65][66][67][68] and measures for BCC control (n = 3) [69][70][71].…”

Section: Resultsmentioning

confidence: 99%

Systematic review and meta-analysis of bovine cysticercosis in Brazil: current knowledge and way forward

2020

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Background: Taenia saginata taeniosis/cysticercosis has been well studied in several countries. Brazil is one of the most important beef exporting countries and has one of the highest cattle population size in the world. In this country, bovine cysticercosis (BCC) remains the most frequent reported zoonosis detected during post-mortem inspection, resulting in costs for the beef sector and public health. We performed a systematic literature review regarding data about BCC epidemiology in Brazil and meta-analyses for its prevalence in different administrative regions and the distribution over time, and based on this discussed possible control strategies. Methods:A systematic review was conducted to obtain data about BCC in Brazil using the words "bovine cysticercosis" and "Brazil" to construct the search phrase. The inclusion criteria used to select articles were: (i) published from 2000 to 2018; (ii) full text available online in Portuguese or English; and (iii) contain information at least regarding one of the following aspects of BCC in Brazil: prevalence, incidence, spatial distribution, risk-factors, economic burden and measures for control. Results:A set of 42 articles was included, covering the prevalence of BCC in Brazil, ranging between 0.01-18.75%. Prevalence results of 40 articles were included in a meta-analysis per administrative region. The highest prevalence was found in the South (3.4%; 95% CI: 2.0-5.2%), followed by the Southeast (2.7%; 95% CI: 1.9-3.6%), Northeast (1.5%; 95% CI: 0.6-2.7%), Central-western (0.9%; 95% CI: 0.3-1.7%) and North (0.0%; 95% CI: 0.0-0.6%) region. In addition, a reduction in prevalence over time was observed in all the evaluated states except for Alagoas and Pará. Conclusions:Besides the large availability of data, a critical lack of information about BCC epidemiology remains in Brazil. Nevertheless, the available data on prevalence, high risk-areas and risk factors should contribute to a better understanding of transmission and the formulation of recommendations for control. A One Health approach will be required to reduce T. saginata taeniosis/cysticercosis prevalence and the consequent economic burden for the beef sector in Brazil, one of the most important beef exporters in the world.

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Preferential infection sites of Cysticercus bovis in cattle experimentally infected with Taenia saginata eggs

Cited by 31 publications

References 20 publications

Distribution ofTaenia saginatametacestodes: a comparison of routine meat inspection and carcase dissection results in experimentally infected calves

Distribution ofTaenia saginatametacestodes: a comparison of routine meat inspection and carcase dissection results in experimentally infected calves

Prevalência, distribuição espacial e fatores de risco para cisticercose bovina no estado de São Paulo

Systematic review and meta-analysis of bovine cysticercosis in Brazil: current knowledge and way forward

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