Borji H, Parandeh S
Department of Pathobiology, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran.
Ann Trop Med Parasitol. 2010 Dec;104(8):641-7. doi: 10.1179/136485910X12851868780261.
In nine districts in the north of Khorasan province, in north-eastern Iran, a 5-year retrospective study was carried out to determine the prevalences, in livestock slaughtered in abattoirs, of the parasitic infections responsible for the condemnation of the animals' carcasses and viscera (and the economic importance of such infections in terms of lost meat and offal). Between 20 March 2005 and 19 March 2010, 436,620 animals (45,360 cattle, 275,439 sheep, 115,674 goats and 147 camels) were slaughtered in the study area and the livers of 30,207 (6.9%), the lungs of 23,259 (5.3%) and the carcasses of 1072 (0.2%) of these animals were condemned. Almost all (92.4%) of the condemned livers, most (68.9%) of the condemned lungs but only 10.8% of the condemned carcasses were rejected because of parasitic infection. The parasitic lesions observed in the condemned livers were attributed to Echinococcus granulosus, Fasciola hepatica and/or Dicrocoelium dendriticum (cattle, sheep and goats) or entirely to E. granulosus (camels). All the parasitic lesions observed in the condemned lungs (which also came from cattle, sheep, goats and camels) were attributed to E. granulosus. Sarcocystis cysts and/or Taenia cysticerci were found in ovine muscle while only Taenia cysticerci were detected in bovine muscle (no parasitic lesions were observed in the muscles of the goats and camels). Parasites were responsible for 80.8% of the condemned organs or carcasses, and the value of the food lost because of parasite-related condemnation (based on market prices in 2010) was estimated to be U.S.$421,826 (U.S.$47,980 for cattle, U.S.$316,344.0 for sheep, U.S.$57,372 for goats and U.S.$130 for camels). The parasites contributing most to the condemnation of otherwise marketable organs and muscles were E. granulosus (52.2%) and D. dendriticum flukes (29.5%). These parasites clearly remain too common and cause considerable economic loss in Khorasan and, presumably, other areas of Iran.
在伊朗东北部霍拉桑省北部的九个地区，开展了一项为期5年的回顾性研究，以确定在屠宰场宰杀的牲畜中，导致动物尸体和内脏被拒收的寄生虫感染的患病率（以及此类感染在肉类和内脏损失方面的经济重要性）。在2005年3月20日至2010年3月19日期间，研究区域内共宰杀了436,620头动物（45,360头牛、275,439只绵羊、115,674只山羊和147峰骆驼），其中30,207头（6.9%）动物的肝脏、23,259头（5.3%）动物的肺脏以及1072头（0.2%）动物的尸体被拒收。几乎所有（92.4%）被拒收的肝脏、大部分（68.9%）被拒收的肺脏，但只有10.8%被拒收的尸体是因寄生虫感染而被拒收的。在被拒收肝脏中观察到的寄生虫病变归因于细粒棘球绦虫、肝片吸虫和/或枝双腔吸虫（牛、绵羊和山羊），或者完全归因于细粒棘球绦虫（骆驼）。在被拒收肺脏中观察到的所有寄生虫病变（这些肺脏也来自牛、绵羊、山羊和骆驼）都归因于细粒棘球绦虫。在绵羊肌肉中发现了肉孢子虫囊肿和/或牛带绦虫囊尾蚴，而在牛肌肉中仅检测到牛带绦虫囊尾蚴（在山羊和骆驼的肌肉中未观察到寄生虫病变）。寄生虫导致了80.8%的被拒收器官或尸体，因与寄生虫相关的拒收而损失的食物价值（基于2010年的市场价格）估计为421,826美元（牛为47,980美元、绵羊为316,344美元、山羊为57,372美元、骆驼为130美元）。对原本可上市的器官和肌肉拒收贡献最大的寄生虫是细粒棘球绦虫（52.2%）和枝双腔吸虫（29.5%）。这些寄生虫在霍拉桑以及大概伊朗的其他地区显然仍然非常常见，并造成了相当大的经济损失。
