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de Neeling AJ van den Broek MJ Spalburg EC van Santen-Verheuvel MG Dam-Deisz WD Boshuizen HC van de Giessen AW van Duijkeren E Huijsdens XW 《Veterinary microbiology》2007,122(3-4):366-372
Recently methicillin resistant Staphylococcus aureus (MRSA) was isolated from pigs and pig farmers in The Netherlands. In order to assess the dissemination of MRSA in the Dutch pig population, we screened 540 pigs in 9 slaughterhouses, where a representative portion of Dutch pigs (63%) was slaughtered in 2005. We found 209 (39%) of the pigs to carry MRSA in their nares. Forty-four of 54 groups of 10 consecutive pigs (81%), each group from a different farm, and all slaughterhouses were affected. All MRSA isolates belonged to 1 clonal group, showing Multi-Locus Sequence Type 398 and closely related spa types (mainly t011, t108 and t1254). Three types of the Staphylococcal Chromosome Cassette (SCCmec) were found: III (3%), IVa (39%) and V (57%). All 44 tested isolates (1 isolate per group) were resistant to tetracycline, reflecting the high and predominant use of tetracyclines in pig husbandry. Twenty-three percent of the isolates were resistant to both erythromycin and clindamycin and 36% to kanamycin, gentamicin and tobramycin but only a single isolate was resistant to co-trimoxazole and none to ciprofloxacin and several other antibiotics. The percentage of MRSA positive pigs was significantly different among slaughterhouses and among groups within slaughterhouses, indicating a high prevalence of MRSA in pigs delivered from the farms as well as cross contamination in the slaughterhouses. 相似文献
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Perilipins have been reported to limit the interaction of lipases with neutral lipids within the droplets, thereby regulating neutral lipid accumulation and utilization. This study aimed to identify the location and expression of PLIN1 and PLIN2 in porcine oocytes during maturation. Quantitative real‐time polymerase chain reaction (qRT‐PCR), immunostaining and Western blot methods were used to characterize the expression and distribution patterns of PLIN1 and PLIN2 in porcine oocytes. The results showed that PLIN1 was not detectable in porcine oocytes. PLIN2 and BODIPY 493/503‐detected neutral lipid droplets appeared identical distribution patterns and extensive colocalization in both GV and MII porcine oocytes. PLIN2 protein expression was higher in GV oocytes than that in MII oocytes (p < 0.05), although PLIN2 mRNA expression was similar in both groups. These findings suggested that PLIN2 was a major lipid droplet‐associated protein in porcine oocytes. 相似文献
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A.J.de Neeling E.C.Spalburg W.D.C.Dam-Deisz H.C.Boshuizen E.van Duijkeren X.W.Huijsdens 杨智满 舒畅 《国外畜牧学(猪与禽)》2007,27(4):57-59,76
荷兰研究人员最近从猪农及其猪上分离到耐甲氧西林金黄色葡萄球菌(methicillin resistant Staphylococcus aureus,MRSA)。为了评估MRSA在荷兰猪群中的流行情况,作者检测了9家屠宰场的540头猪,这些屠宰场2005年度的生猪屠宰量占荷兰当年总屠宰量的63%。作者发现,在所测猪群中有209头(占39%)猪的鼻腔中携带MRSA。全部54个检测组(每组10头猪)中44组(81%)携带了MRSA,每个组来自不同的猪场,并且所有屠宰场均被污染。所有MRSA分离株均属于同一个菌群--多位点序列(Multi-Locus Sequence,MLS)398型和与之密切相关的spa基因型(主要是t001、t008和t1254)。发现了金黄色葡萄球菌染色体基因盒(Staphylococcal Chromosome Cassette,SCCmec)的三个型:Ⅲ(3%),Ⅳa(39%)和Ⅴ(57%)。44株(每组1株)对四环素均有耐药性,由此提示猪场普遍使用了四环素类抗生素。其中,同时耐红霉素和克林霉素的分离株占23%,同时耐卡那霉素、庆大霉素和托普霉素的分离株占36%,耐复方新诺明的仅1株,无耐环丙沙星和其它几种抗生素的菌株。各屠宰场间MRSA阳性猪比例显著不同,各试验组间也不相同,表明猪场的猪具有高MRSA流行率,而且屠宰场内存在高交叉感染率。 相似文献
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BZ Yang CY Yang RC Li GS Qin XF Zhang CY Pang MT Chen FX Huang Z Li HY Zheng YJ Huang XW Liang 《Reproduction in domestic animals》2010,45(5):e21-e25
The aim of this study was to explore the feasibility of cryopreservation of inter‐subspecies cloned embryos in buffalo. In our experiment, river buffalo ear fibroblast nucleus was fused into swamp buffalo oocyte cytoplasm. The blastocyst formation rate for nuclear transfer of freshly thawed cells was not different from those of growing cells, confluent or serum‐starved cells. A total of 122 cloned blastocysts derived from cryopreserved fibroblasts were cryopreserved and thawed, 37 were survived, the cryosurvival rate was 30.3%. The survived blastocysts were transferred into 15 recipient buffalos. Five of the recipients established pregnancy, but four of them aborted on day 53, 59, 145 and 179 of gestation respectively. One cross‐bred buffalo (Murrah × Swamp buffalo (2n = 49) received three embryos delivered a 40.5 kg female calf by natural delivery on day 320 of gestation. Up to now (13‐month old), the cloned calf has been growing well with no abnormity observed. These results demonstrated that cryopreservation of inter‐subspecies cloned embryos is feasible to produce buffalo offspring. 相似文献
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