排序方式： 共有7条查询结果，搜索用时 15 毫秒
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Basma M. Sheta Trevon L. Fuller Brenda Larison Kevin Y. Njabo Ahmed Samy Ahmed Ryan Harrigan Anthony Chasar Soad Abdel Aziz Abdel-Aziz A. Khidr Mohamed M. Elbokl Lotfy Z. Habbak Thomas B. Smith 《Veterinary microbiology》2014
Highly pathogenic influenza A virus subtype H5N1 causes significant poultry mortality in the six countries where it is endemic and can also infect humans. Egypt has reported the third highest number of poultry outbreaks (n = 1084) globally. The objective of this cross-sectional study was to identify putative risk factors for H5N1 infections in backyard poultry in 16 villages in Damietta, El Gharbia, Fayoum, and Menofia governorates from 2010–2012. Cloacal and tracheal swabs and serum samples from domestic (n = 1242) and wild birds (n = 807) were tested for H5N1 via RT-PCR and hemagglutination inhibition, respectively. We measured poultry rearing practices with questionnaires (n = 306 households) and contact rates among domestic and wild bird species with scan sampling. Domestic birds (chickens, ducks, and geese, n = 51) in three governorates tested positive for H5N1 by PCR or serology. A regression model identified a significant correlation between H5N1 in poultry and the practice of disposing of dead poultry and poultry feces in the garbage (F = 15.7, p < 0.0001). In addition, contact between domestic and wild birds was more frequent in villages where we detected H5N1 in backyard flocks (F = 29.5, p < 0.0001). 相似文献
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Njabo KY Fuller TL Chasar A Pollinger JP Cattoli G Terregino C Monne I Reynes JM Njouom R Smith TB 《Veterinary microbiology》2012,156(1-2):189-192
Although swine origin A/H1N1/2009 influenza virus (hereafter "pH1N1″) has been detected in swine in 20 countries, there has been no published surveillance of the virus in African livestock. The objective of this study was to assess the circulation of influenza A viruses, including pH1N1 in swine in Cameroon, Central Africa. We collected 108 nasal swabs and 98 sera samples from domestic pigs randomly sampled at 11 herds in villages and farms in Cameroon. pH1N1 was isolated from two swine sampled in northern Cameroon in January 2010. Sera from 28% of these herds were positive for influenza A by competitive ELISA and 92.6% of these swine showed cross reactivity with pandemic A/H1N1/2009 influenza virus isolated from humans. These results provide the first evidence of this virus in the animal population in Africa. In light of the significant role of swine in the ecology of influenza viruses, our results call for greater monitoring and study in Central Africa. 相似文献
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A Ortega‐Pacheco M Jiménez‐Coello E Gutiérrez‐Blanco KY Acosta‐Viana E Guzmán‐Marín MA Zavala‐Sánchez NE Montalvo‐Beltrán MS Pérez‐Gutiérrez 《Reproduction in domestic animals》2010,45(6):1126-1129
Papaya seeds (Carica papaya Linn) have been found to have a significant effect on sperm characteristics in some mammals, including humans, but no studies have investigated the effects on dogs. In the present study, a significant decrease in sperm concentration was observed in a group of dogs treated with extracts from washed papaya seeds, but no decrease was observed in the group of dogs treated with non‐washed seeds. An important effect of extract components from washed seeds such as fatty acids is probably involved in the reduction of sperm production because of Sertoli cell damage, as has been suggested for langur monkeys. Dilution of the active components in the non‐washed papaya seeds or interference with some of the components may reduce the expected effect on spermatogenesis. This first report on the effects of a chloroformic extract of papaya seeds in dogs suggests that an increased dose is necessary to achieve azoospermia. 相似文献
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Inci A Yildirim A Njabo KY Duzlu O Biskin Z Ciloglu A 《Veterinary parasitology》2012,188(1-2):179-184
Assessing vector-parasite relationship is important in understanding the emergence of vector-borne diseases and the evolution of parasite diversity. This study investigates avian Plasmodium parasites in mosquitoes collected from Kayseri province in Central Anatolian, Turkey and determines the haemosporidian parasite lineages from these mosquito species. A total of 6153 female mosquitos from 6 species were collected from 46 sites during June-August of 2008 and 2009. Each mosquito's head-thorax and abdomen were separated, categorized with respect to species and collection area and pooled for DNA extraction. A total of 1198 genomic DNA pools (599 thorax-head, 599 abdomen) were constituted of which 128 pools (59 thorax-head, 69 abdomen) were positive for avian haemosporidian parasites (Plasmodium and Haemoproteus) by Nested-PCR analysis. Culex pipens, Aedes vexans, Culex theileri and Culiseta annulata were positive with minimum infection rates (MIRs) of 16.22 and 18.15, 4.72 and 5.98, 5.18 and 10.36, 10.64 and 10.64 in their thorax-head and abdomen parts, respectively. No avian haemosporidian DNA was detected from Culex hortensis and Anopheles maculipennis. Phylogenetic analyses of the partial cytb gene of avian haemosporidian mt-DNA from 13 positive pools revealed that 11 lineages in four phylogenic groups were Plasmodium and the other two were Haemoproteus. Our results suggest that Cx. pipiens could probably be the major vector of avian Plasmodium in Central Turkey. This is the first report of molecular detection and characterization of avian Plasmodium lineages from mosquitoes in Turkey. 相似文献
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LIU Qiang HUANG Ying-xiang WANG Cong DONG Sheng College of Animal Science Veterinary Medicine Shanxi Agricultural University Taigu Shanxi Province China Karl Dawson Worldwide Research Alltech INC. Nicholasville KY MIAO Chao-hua GAO Deng-hong Beijing Alltech Biological Products Co. Ltd China 《家畜生态》2007,(5)
选用35头处于干奶期40d、泌乳期相近和上胎平均日产奶量20kg的荷斯坦奶牛,采用完全随机区组设计分为7组,即:对照组,基础日粮(不加硒);试验组1、2、3添加亚硒酸钠,分别在基础日粮中加硒7.5mg/d、15mg/d和22.5mg/d;试验组4、5、6添加赛乐硒,分别在基础日粮中加硒7.5mg/d、15mg/d和22.5mg/d,研究赛乐硒和无机硒对奶牛发情周期生殖激素分泌和繁殖性能的影响。结果表明:赛乐硒较无机硒显著提高了发情周期促性腺激素释放激素、促卵泡素、促黄体素、雌二醇和孕酮含量,显著提高了受配率和受胎率,缩短了胎衣排出周期,促进母牛正常发情。适宜补硒量为15 mg/d。 相似文献
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