Relação da precocidade de terminação e a redução da prevalência de cisticercose em bovinos

Laura Lúcia Dos Santos Oliveira,Vicente Ribeiro Rocha Júnior,Walter Dos Santos Lima,Raul Herberth Freitas Rocha,Leandro Farias Batista,Fredson Vieira E Silva

doi:10.21708/avb.2019.13.1.8260

Laura Lúcia Dos Santos Oliveira, Vicente Ribeiro Rocha Júnior + Show 4 more

Open Access

https://doi.org/10.21708/avb.2019.13.1.8260

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Abstract

This study aimed to group cattle carcasses with similar characteristics to assess the group-specific prevalence of cysticercosis using data from the slaughter of 15,002 cattle. The following variables were recorded: carcass weight, cover fat, individual age, and prevalence of cysticercosis. A k-means clustering method was used to examine the relationship between carcass characteristics and the prevalence of cysticercosis. We did not specify the number of clusters before the analyses but used automatic methods based on a cross-validation to select the best-fitting clusters. One of the three produced clusters included carcass weight, cover fat, and age, as desired by the Brazilian meat industry. This cluster showed a reduced prevalence of cysticercosis (P = 0.0147) and earlier finishing compared with the other groups. In conclusion, earlier finishing seems to be associated with a lower prevalence of bovine cysticercosis.

Highlights

The bovine taeniasis-cysticercosis complex can be defined as a set of pathological alterations caused by adult and larval forms of Taenia saginata
This zoonosis can show two distinct forms: taeniasis, which affects humans; and cysticercosis, which is caused by the presence of Cysticercus bovis
Information on the prevalence of bovine cysticercosis is important for the implementation of control programs (ACEVEDO-NIETO et al, 2012)

Summary

Introduction

The bovine taeniasis-cysticercosis complex can be defined as a set of pathological alterations caused by adult and larval forms of Taenia saginata. This zoonosis can show two distinct forms: taeniasis, which affects humans; and cysticercosis, which is caused by the presence of Cysticercus bovis Infection of humans with T. saginata is common in areas where sanitation is inadequate (USIP et al, 2011; ACEVEDO-NIETO et al, 2012). This parasite is commonly found in South America, North America, and Africa Information on the prevalence of bovine cysticercosis is important for the implementation of control programs (ACEVEDO-NIETO et al, 2012). Due to the diversity of environments and the associated phenotypical differences in cattle of the same genotype (LOPES et al, 2008), age at the time of slaughter is variable

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