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351.
固相萃取-高效液相色谱法测定畜禽肉中氯霉素残留量 总被引:3,自引:0,他引:3
目的:建立畜禽肉中氯霉素的固相萃取-高效液相色谱测定方法。方法:样品采用乙酸乙酯提取,固相萃取法净化,经液相色谱于278 nm处测定。结果:该方法的回收率65.6%-80.7%,变异系数0.80%-8.02%。结论:该方法准确可靠,适合于畜禽肉中氯霉素的残留测定。 相似文献
352.
Janneke Schreuder Thijs T. M. Manders Armin R. W. Elbers Arco N. van der Spek Ruth J. Bouwstra J. Arjan Stegeman Francisca C. Velkers 《Transboundary and Emerging Diseases》2021,68(1):88-97
In recent years, different subtypes of highly pathogenic avian influenza (HPAI) viruses caused outbreaks in several poultry types worldwide. Early detection of HPAI virus infection is crucial to reduce virus spread. Previously, the use of a mortality ratio threshold to expedite notification of suspicion in layer farms was proposed. The purpose of this study was to describe the clinical signs reported in the early stages of HPAI H5N8 and H5N6 outbreaks on chicken and Pekin duck farms between 2014 and 2018 in the Netherlands and compare them with the onset of an increased mortality ratio (MR). Data on daily mortality and clinical signs from nine egg‐producing chicken farms and seven Pekin duck farms infected with HPAI H5N8 (2014 and 2016) and H5N6 (2017–2018) in the Netherlands were analysed. In 12 out of 15 outbreaks for which a MR was available, MR increase preceded or coincided with the first observation of clinical signs by the farmer. In one chicken and two Pekin duck outbreaks, clinical signs were observed prior to MR increase. On all farms, veterinarians observed clinical signs of general disease. Nervous or locomotor signs were reported in all Pekin duck outbreaks, but only in two chicken outbreaks. Other clinical signs were observed less frequently in both chickens and Pekin ducks. Compared to veterinarians, farmers observed and reported clinical signs, especially respiratory and gastrointestinal signs, less frequently. This case series suggests that a MR with a set threshold could be an objective parameter to detect HPAI infection on chicken and Pekin duck farms at an early stage. Observation of clinical signs may provide additional indication for farmers and veterinarians for notifying a clinical suspicion of HPAI infection. Further assessment and validation of a MR threshold in Pekin ducks are important as it could serve as an important tool in HPAI surveillance programs. 相似文献
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354.
Samir Refaey Eduardo Azziz-Baumgartner Marwa Mohamed Amin Manal Fahim Katherine Roguski Hanaa Abu Elsood Abd Elaziz A. Danielle Iuliano Noha Salah Timothy M. Uyeki Steven Lindstrom Charles Todd Davis Alaa Eid Mohamed Genedy Amr Kandeel 《Emerging infectious diseases》2015,21(12):2171-2173
During November 2014–April 2015, a total of 165 case-patients with influenza virus A(H5N1) infection, including 6 clusters and 51 deaths, were identified in Egypt. Among infected persons, 99% reported poultry exposure: 19% to ill poultry and 35% to dead poultry. Only 1 person reported wearing personal protective equipment while working with poultry. 相似文献
355.
Shumin Xie Weixin Jia Yicun Lin Kaixiang Xing Xingxing Ren Wenbao Qi Ming Liao 《Emerging infectious diseases》2015,21(9):1657-1660
Fourteen influenza A(H7N9) viruses were isolated from poultry or the environment in live poultry markets in Guangdong Province, China during 2014−2015. Phylogenetic analysis showed that all viruses were descended from viruses of the second wave of influenza A(H7N9) virus infections during 2013. These viruses can be divided into 2 branches. 相似文献
356.
Brian J. Lenny Karthik Shanmuganatham Stephanie Sonnberg Mohammed M. Feeroz S.M. Rabiul Alam M. Kamrul Hasan Lisa Jones-Engel Pamela McKenzie Scott Krauss Robert G. Webster Jeremy C. Jones 《Emerging infectious diseases》2015,21(12):2174-2177
Avian influenza A(H9N2) is an agricultural and public health threat. We characterized an H9N2 virus from a pet market in Bangladesh and demonstrated replication in samples from pet birds, swine tissues, human airway and ocular cells, and ferrets. Results implicated pet birds in the potential dissemination and zoonotic transmission of this virus. 相似文献
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358.
Peng Wu Vicky J. Fang Qiuyan Liao Diane M.W. Ng Joseph T. Wu Gabriel M. Leung Richard Fielding Benjamin J. Cowling 《Emerging infectious diseases》2014,20(5):882-886
We conducted a population survey in Hong Kong to gauge psychological and behavioral responses to the threat of influenza A(H7N9) and support for closure of live poultry markets. We found low anxiety and low levels of exposure to live poultry but mixed support for permanent closure of the markets. 相似文献
359.
Ming Fan Biao Huang Ao Wang Liquan Deng Donglin Wu Xinrong Lu Qinglong Zhao Shuang Xu Fiona Havers Yanhui Wang Jing Wu Yuan Yin Bingxin Sun Jianyi Yao Nijuan Xiang 《Emerging infectious diseases》2014,20(11):1902-1905
We report on a case of human infection with influenza A(H7N9) virus in Jilin Province in northeastern China. This case was associated with a poultry farm rather than a live bird market, which may point to a new focus for public health surveillance and interventions in this evolving outbreak. 相似文献
360.
Maho Imanishi Tara C. Anderson Janell Routh Catherine Brown Giuseppe Conidi Lynda Glenn Vasudha Reddy HaeNa Waechter Michelle Malavet Mawuli Nyaku Susan Bohm Sally Bidol Katherine Arends Amy Saupe Jeffrey Higa Thai-An Nguyen Jeshua Pringle Casey Barton Behravesh Stacey Bosch 《Emerging infectious diseases》2014,20(1):167-169