看国外 | 优化饲料方案或可降低非洲猪瘟传播

看国外 2019-01-11 17:03:21

来源:All about feed

The ongoing outbreaks of African Swine Fever (ASF) in China, Belgium and elsewhere has also forced a critical look at the handling of feed ingredients and the use of porcine plasma. But caution regarding the implementation of these measure should be taken.

非洲猪瘟(ASF)在中国比利时和其他地方持续爆发,迫使我们对饲料原料的处理和猪血浆的使用进行深入研究。但采取这些措施时应谨慎。

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Emmy Koeleman

All About Feed编辑

The National Pork Board, National Pork Producers Council, Swine Health Information Center and the American Association of Swine Veterinarians released a combined statement for US pig producers to look at the handling procedure of imported feed ingredients. The combined statement refers to research that made clear it’s possible for swine disease viruses to survive in shipments of certain feed ingredients during transoceanic shipping to US ports and even to inland points of feed manufacture.

美国猪肉委员会、国家猪肉生产者委员会、养猪健康信息中心和美国养猪兽医协会发布了一份联合声明,要求美国养猪生产者研究进口饲料原料的处理程序。该声明起源于一项研究,在饲料跨洋运输到美国港口甚至内陆饲料生产点期间,猪病病毒可能在某些饲料原料的运输过程中存活。

Advice for holding time

建议保存时间

Based on this current research, a holding time of 78 days after the date of manufacture and bagging or sealing to prevent additional contamination (“born on date”) for amino acids, minerals or vitamins will degrade 99.99% of viral contamination. The holding time extends to 286 days for soybean meal to allow for similar viral degradation, once shipped to prevent additional contamination.

The statement is to be interpreted as an educational tool and not a recommended course of action. Dave Pyburn, DVM, senior vice president of science and technology for the National Pork Board. “It’s just one more tool in our arsenal against African Swine Fever and other diseases that we hope will offer US producers more protection against this growing global threat.”

根据目前的研究,为防止氨基酸、矿物质或维生素受到额外污染,饲料在制造、装袋或密封(“生产日期”)之后保存78天,可以降低99.99%的病毒污染。豆粕的保存时间延长至286天,以便类似的病毒降解,从而避免运输时造成额外污染。应该把该声明视为一种教育工具,而不是建议的行动方案。美国临床兽医学博士(DVM)、国家猪肉委员会科学和技术高级副总裁Dave Pyburn表示,“这只是让我们在对抗非洲猪瘟和其他疾病时多一个手段,我们希望这可以为美国生产者提供更多保护,以防范这种日益严重的全球威胁。”

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图:Bart Nijs

Current, but limited, research

目前有限的研究

The American Feed Industry Association (AFIA) responded to this advice and expressed caution regarding the implementation of measures that are neither proven scientifically or approved by federal, state or foreign regulators. However, given preliminary research has shown the virus can survive a simulated transboundary shipment in inoculated feed and feed ingredients, many in the pork industry are still calling for, or are moving forward with, measures which some believe will mitigate the risks of transmission via imported feed ingredients.

美国饲料工业协会(AFIA)回应了这一建议,并表示应谨慎对待这一既未经科学证实或未经联邦、州或外国监管机构批准的措施。然而,鉴于初步研究表明该病毒能够在接种饲料和饲料原料的模拟跨境运输中存活下来,许多业内人士仍在呼吁或正在采取某些措施,一些人认为这些措施将可以减轻病毒通过进口饲料原料传播的风险。

While the pork organisations’ document represents their current thinking on minimum ingredient holding times, it should be noted that it is based on current, but limited, research. The pork organizations also provide background information on how those dates are derived with the current, but limited research. AFIA stands firm in its opinion that additional research in this area is necessary.

虽然猪肉行业组织的文件代表了他们目前对饲料最低保存时间的看法,但应该指出的是,这只是基于当前有限的研究。猪肉行业组织一些背景资料,说明这个保存期限是如何根据目前有限的研究得出的。 AFIA坚持认为,有必要在这方面进行更多的研究。

Use of blood plasma

血浆的使用

In China, the government took some decisions regarding feed ingredients. For starters, Spray Dried Porcine Plasma (SDPP) has been suspended for use in animal feed, since 13 September.

中国政府就饲料原料做出了一些决定。自2018年9月13日起,已暂停喷雾干燥的猪血浆(SDPP)用于动物饲料。

However, the European Animal Protein Association (EAPA) claims that the use of SDPP is completely safe. “SDPP is exclusively made up from blood of healthy animals after veterinary approval from farms free of ASF under supervision and control of competent authorities. The manufacturing process of EAPA members contains several independent safety steps such as pooling liquid plasma from different sources and therefore, this contribute to a dilution. Pooling is a recognised biosafety feature for human plasma products used for transfusions.

然而,欧洲动物蛋白协会(EAPA)声称使用SDPP是完全安全的。其网站上写道,“SDPP完全由健康动物的血液组成,经过主管当局监督和控制,在没有发生非洲猪瘟的农场获得兽医批准。欧洲动物蛋白协会成员的SDPP制造过程包含几个独立的安全步骤,例如汇集不同来源的液体血浆,汇集是用于输血的人血浆产品的公认的生物安全特征。

The second step is the spray-drying process at high temperatures (80ºC throughout its substances) that inactivates high heat resistant viral microorganisms (using different model viruses), including non-enveloped viruses like swine vesicular disease virus.

第二步是在高温(整个物质为80℃)下喷雾干燥,使高耐热病毒微生物(使用不同的模型病毒)灭活,包括无包膜病毒,如猪水疱病病毒。

Finally, the storage of final dried product at controlled warehouse temperature (>20ºC) during minimum 14 days has been demonstrated to be effective in inactivating enveloped viruses similar to ASF like porcine epidemic diarrhoea virus (PEDV) or porcine reproductive and respiratory syndrome virus (PRRSV),” EAPA writes on its website.

最后,已证明最终干燥产品在受控仓库温度(>20ºC)下储存至少14天可有效灭活ASF之类的包膜病毒,如猪流行性腹泻病毒(PEDV)或猪生殖和呼吸综合征病毒(PRRSV)”。

It also mentions that the manufacturing process of EAPA members for spray dried blood products are aligned with the World Health Organization guidelines for assuring viral safety of human plasma products used for transfusions, with the additional safety feature that animal spray-dried blood products are used in animal nutrition products that are orally fed to animals.

欧洲动物蛋白协会还提到,该组织成员的喷雾干燥血液制品的制造过程符合世界卫生组织关于确保用于输血的人血浆产品的病毒安全性的指导方针,另外的安全特征则表现在,动物喷雾干燥的血液制品能用于动物口服营养产品当中。

(文/爱猪网记者刘坤颖编译,爱猪网原创请勿转载)


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