CN105603043A - 一种金黄色葡萄球菌选择性培养基 - Google Patents
一种金黄色葡萄球菌选择性培养基 Download PDFInfo
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Abstract
本发明涉及一种金黄色葡萄球菌选择性培养基,配制1000ml选择性培养基的配方中含有胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠8~12mg;亚碲酸钾0.6g;琼脂0.2g;蒸馏水加至1000ml。制备方法,包括以下步骤:(1)取马铃薯加水煮沸1小时,过滤,取滤液,调整体积到浓度为300g/L,得马铃薯水煮液;(2)取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;阿波酮酸及N-乙酰基-D-葡萄糖胺溶于步骤1所得马铃薯水煮液中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。本发明与现有技术相比较,具有检出可靠、金黄色葡萄球菌分离率高的特点。
Description
技术领域
本发明涉及医学检验领域,具体涉及一种金黄色葡萄球菌选择性培养基。
背景技术
金黄色葡萄球菌,也称“金葡菌”,细胞壁含90%的肽聚糖和10%的磷壁酸。其肽聚糖的网状结构比革兰氏阴性菌致密,染色时结晶紫附着后不被酒精脱色故而呈现紫色,相反,阴性菌的细胞壁肽聚糖层薄、交联度差,脂类含量高,所以紫色复合物被酒精冲掉然后附着了沙黄的红色。金黄色葡萄球菌与青霉素的发现有很大的渊源。当年弗莱明就是在他的金黄色葡萄球菌的培养皿中发现有些球菌被杀死了,于是发现了青霉素。而研究也表明青霉素只对以金黄色葡萄球菌为代表的革兰氏阳性菌作用明显。这也是由肽聚糖层的厚度和结构造成的。
发明内容
本发明的技术任务是针对以上现有技术的不足,提供一种金黄色葡萄球菌选择性培养基。
本发明解决其技术问题的技术方案是:
一种金黄色葡萄球菌选择性培养基,配制1000ml选择性培养基的配方中含有胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠8~12mg;亚碲酸钾0.6g;琼脂0.2g;蒸馏水加至1000ml。
进一步地,每1000ml选择性培养基还含有阿波酮酸0.1g。
进一步地,每1000ml选择性培养基还含有浓度300g/L的马铃薯水煮液200~300ml。
进一步地,每1000ml选择性培养基还含有N-乙酰基-D-葡萄糖胺5mg;阿波酮酸0.1g;浓度300g/L的马铃薯水煮液200~300ml。
一种金黄色葡萄球菌选择性培养基的制备方法,包括以下步骤:
(1)取马铃薯加水煮沸1小时,过滤,取滤液,调整体积到浓度为300g/L,得马铃薯水煮液;
(2)取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;阿波酮酸及N-乙酰基-D-葡萄糖胺溶于步骤1所得马铃薯水煮液中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
该发明的有益效果在于:本发明与现有技术相比较,具有检出可靠、金黄色葡萄球菌分离率高的特点。
具体实施方式
以下结合实际情况,对本发明的具体实施方式作详细说明。
实施例1
配制1000ml选择性培养基的配方中含有:胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠8mg;亚碲酸钾0.6g;琼脂0.2g;蒸馏水加至1000ml。制备方法:取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂溶于蒸馏水中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
实施例2
配制1000ml选择性培养基的配方中含有:胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠12mg;亚碲酸钾0.6g;琼脂0.2g;N-乙酰基-D-葡萄糖胺5mg;蒸馏水加至1000ml。制备方法:取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;N-乙酰基-D-葡萄糖胺溶于蒸馏水中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
实施例3
配制1000ml选择性培养基的配方中含有:胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠10mg;亚碲酸钾0.6g;琼脂0.2g;阿波酮酸0.1g;蒸馏水加至1000ml。制备方法:取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;阿波酮酸溶于蒸馏水中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
实施例4
配制1000ml选择性培养基的配方中含有:胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠9mg;亚碲酸钾0.6g;琼脂0.2g;浓度300g/L的马铃薯水煮液200ml;蒸馏水加至1000ml。制备方法:(1)取马铃薯加水煮沸1小时,过滤,取滤液,调整体积到浓度为300g/L,得马铃薯水煮液;(2)取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;溶于步骤1所得马铃薯水煮液中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
实施例5
配制1000ml选择性培养基的配方中含有:胰蛋白胨25g;葡萄糖液
200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠11mg;亚碲酸钾0.6g;琼脂0.2g;N-乙酰基-D-葡萄糖胺5mg;阿波酮酸0.1g;浓度300g/L的马铃薯水煮液300ml;蒸馏水加至1000ml。制备方法为:(1)取马铃薯加水煮沸1小时,过滤,取滤液,调整体积到浓度为300g/L,得马铃薯水煮液;(2)取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;阿波酮酸及N-乙酰基-D-葡萄糖胺溶于步骤1所得马铃薯水煮液中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
本发明所得金黄色葡萄球菌选择性培养基具有检出可靠、金黄色葡萄球菌分离率高的特点,为临床资料充分证明,有关资料如下。
1对象与方法:
1.1选择性培养基制备:共设3组,分别为对照组、实施例1方案组、实施例5方案组。对照组为葡萄球菌选择性枸橼酸镁110(CHAPMAN枸橼酸镁);实施例1方案组、实施例5方案组的配方和制备方法见实施例。
1.2方法:将20份经由PCR确定金黄色葡萄球菌阳性的标本中混入金黄色葡萄球菌,接种于培养基上,在37℃下孵育24小时。
1.3统计学分析:用SPSS12.0进行统计分析,P<0.05表示有显著性意义。
2结果:在20份接种标本中,细菌培养分离并鉴定为金黄色葡萄球菌的,实施例1方案组为16例,实施例5方案组为18例;对照组为3例,经统计学处理,本发明各实施例组与对照组比较具有明显差异(P<0.001)。结果表明,本发明实施例金黄色葡萄球菌分离率明显高于现有的选择性培养基。
以上所述是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也视为本发明的保护范围。
Claims (5)
1.一种金黄色葡萄球菌选择性培养基,其特征在于:配制1000ml选择性培养基的配方中含有胰蛋白胨25g;葡萄糖液200ml;芋酸5g;假细锥甲素0.5g;枸橼酸镁25g;丙酮酸钠8~12mg;亚碲酸钾0.6g;琼脂0.2g;蒸馏水加至1000ml。
2.根据权利要求1所述的金黄色葡萄球菌选择性培养基,其特征在于:每1000ml选择性培养基还含有阿波酮酸0.1g。
3.根据权利要求1所述的金黄色葡萄球菌选择性培养基,其特征在于:每1000ml选择性培养基还含有浓度300g/L的马铃薯水煮液200~300ml。
4.根据权利要求1所述的金黄色葡萄球菌选择性培养基,其特征在于:每1000ml选择性培养基还含有N-乙酰基-D-葡萄糖胺5mg;阿波酮酸0.1g;浓度300g/L的马铃薯水煮液200~300ml。
5.根据权利要求1至4所述的金黄色葡萄球菌选择性培养基,其特征在于:所述选择性培养基的制备方法,包括以下步骤:
(1)取马铃薯加水煮沸1小时,过滤,取滤液,调整体积到浓度为300g/L,得马铃薯水煮液;
(2)取胰蛋白胨;葡萄糖液;芋酸;假细锥甲素;枸橼酸镁;丙酮酸钠;亚碲酸钾;琼脂;阿波酮酸及N-乙酰基-D-葡萄糖胺溶于步骤1所得马铃薯水煮液中,混匀过滤后,蒸馏水定容,低温灭菌2次,每次45min,灭菌后分装。
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