Bisaillon J R, Meek A H, Feltmate T E
Agriculture Canada, Veterinary Inspection Directorate, Montreal, Quebec.
Can J Vet Res. 1988 Apr;52(2):269-76.
An epidemiological study was conducted to assess the rates of condemnation and the diagnoses made on condemned broiler chicken carcasses in a federally-inspected abattoir. The first objective was to determine the predictive value of a positive test: the proportion of birds that were truly unfit for human consumption among condemned carcasses. The second objective was to assess the degree of agreement between diagnoses made in the abattoir and diagnoses determined by a detailed gross postmortem examination on the same condemned carcasses. A two-stage convenience sampling technique was used to obtain the birds needed. Fifteen lots of birds were selected and within each of these, approximately 45 condemned carcasses were selected for a total of 680. All the diagnoses made on these birds at the abattoir were recorded and the carcasses individually identified. The sampled carcasses were transported to the Ontario Veterinary College where a panel of three federal veterinarians independently judged whether the birds were fit for human consumption. In addition, a detailed gross postmortem examination was conducted on each carcass. An overall predictive value of a positive test of approximately 70% was found. The degree of agreement among members of the panel of examiners was also tested. The overall agreement was good (Kappa = 0.62 between examiners 1 and 2 and 0.51 between examiners 1 and 3). However, carcasses condemned for specific conditions at the abattoir, namely valgus varus deformity, mutilation, cellulitis and hepatitis showed no agreement beyond chance, while other carcasses condemned for conditions such as cyanosis and bruising showed poor agreement concerning their disposition for at least one pair of examiners.(ABSTRACT TRUNCATED AT 250 WORDS)
开展了一项流行病学研究，以评估在一家联邦检查的屠宰场中，肉鸡胴体的废弃率以及对废弃胴体所做的诊断。第一个目标是确定阳性检测的预测价值：即废弃胴体中真正不适于人类食用的禽类比例。第二个目标是评估屠宰场做出的诊断与对相同废弃胴体进行详细大体尸检所确定的诊断之间的一致程度。采用两阶段便利抽样技术获取所需禽类。选取了15批禽类，每批中大约选取45具废弃胴体，共680具。记录在屠宰场对这些禽类所做的所有诊断，并对胴体进行单独标识。将抽样的胴体运至安大略兽医学院，由三名联邦兽医组成的小组独立判断这些禽类是否适于人类食用。此外，对每具胴体进行了详细的大体尸检。发现阳性检测的总体预测价值约为70%。还对检查小组成员之间的一致程度进行了检测。总体一致性良好（检查人员1和2之间的Kappa值为0.62，检查人员1和3之间的Kappa值为0.51）。然而，在屠宰场因特定状况（即内外翻畸形、残缺、蜂窝织炎和肝炎）而被废弃的胴体，其一致性无统计学意义，而因诸如发绀和瘀伤等状况被废弃的其他胴体，至少有一组检查人员在其处理方式上一致性较差。（摘要截短于250字）
