Ndobeni Tandile Nwabisa, Magwedere Kudakwashe, Qekwana Daniel Nenene
Section of Veterinary Public Health, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, South Africa.
Directorate of Veterinary Public Health, Department of Land Reform and Rural Development, South Africa.
Vet World. 2023 Nov;16(11):2236-2243. doi: 10.14202/vetworld.2023.2236-2243. Epub 2023 Nov 11.
Mechanically recovered meat (MRM) products have been linked to outbreaks of human salmonellosis. However, no studies have investigated the prevalence of species in MRM products in South Africa despite the products being imported. Therefore, this study aimed to estimate the prevalence and factors associated with spp. contamination of mechanically recovered poultry meat (MRPM) imported into South Africa.
This study used secondary data of MRPM consignments imported through a port entry into South Africa from May 2016 to December 2017. Crude and factor-specific proportions of positive MRPM and their 95% confidence intervals were calculated. A logistic regression model was used to assess the association among country, season, importer, year, and MRPM status.
A total of 8127 MRPM consignments were imported. Seventeen percentages (17.18%, 985/5733) of consignments tested positive for species and only 364 isolates were serotyped. Heidelberg (73.90%, 269/364) was the most common serotype followed by Infantis (6.59%, 24/364), Salamae (4.67%, 17/364), and Schwarzengrund (3.57%, 13/364). The odds of a consignment testing positive for spp. was higher among consignments from country-B (Odds Ratio [OR]: 3.958, p < 0.0001) compared to "All others." The odds of testing positive for were also higher among consignments imported in autumn (OR: 1.488, p < 0.0001) but lower among those imported in spring (OR: 0.767, p = 0.0004) and summer (OR: 0.843, p < 0.0001) when compared to the winter season. Consignments imported in 2016 compared to 2017 were 1.563 times (p < 0.0001) as likely to test positive for a species.
species were reported in MRPM consignments in this study with Heidelberg being the most common serotype. Furthermore, some serotypes reported in this study have been implicated in foodborne disease outbreaks. Country of origin, season, and year of importation were significantly associated with the odds of a consignment testing positive for species.
机械回收肉（MRM）产品与人类沙门氏菌病的暴发有关。然而，尽管南非有进口此类产品，但尚无研究调查南非MRM产品中该菌的流行情况。因此，本研究旨在估计进口到南非的机械回收禽肉（MRPM）中沙门氏菌属的流行率及其相关因素。
本研究使用了2016年5月至2017年12月通过港口进入南非的MRPM货物的二手数据。计算了沙门氏菌阳性MRPM的粗比例和特定因素比例及其95%置信区间。采用逻辑回归模型评估国家、季节、进口商、年份与MRPM沙门氏菌状态之间的关联。
共进口了8127批MRPM货物。17.18%（985/5733）的货物沙门氏菌检测呈阳性，仅对364株分离株进行了血清分型。海德堡沙门氏菌（73.90%，269/364）是最常见的血清型，其次是婴儿沙门氏菌（6.59%，24/364）、萨拉马沙门氏菌（4.67%，17/364）和施瓦岑格鲁德沙门氏菌（3.57%，13/364）。与“所有其他国家”相比，来自B国的货物沙门氏菌检测呈阳性的几率更高（优势比[OR]：3.958，p<0.0001）。与冬季相比，秋季进口的货物沙门氏菌检测呈阳性的几率也更高（OR：1.488，p<0.0001），但春季（OR：0.767，p = 0.0004）和夏季（OR：0.843，p<0.0001）进口的货物检测呈阳性的几率较低。与2017年相比，2016年进口的货物沙门氏菌检测呈阳性的可能性高1.563倍（p<0.0001）。
本研究在MRPM货物中报告了沙门氏菌属，海德堡沙门氏菌是最常见的血清型。此外，本研究报告的一些沙门氏菌血清型与食源性疾病暴发有关。原产国、季节和进口年份与货物沙门氏菌检测呈阳性的几率显著相关。
