耐甲氧西林金葡菌顯色培養基
HiCrome MeReSa HiVeg Agar Base
貨號 | 品名 | 規格 | 價(jià)格 |
MV1674 | 耐甲氧西林金葡菌顯色培養基 HiCrome MeReSa HiVeg Agar Base(需如下添加劑) | 100g 500g | 詢(xún)價(jià) |
FD229 | MeReSa Selective Supplement(甲氧西林) | 5管 | 詢(xún)價(jià) |
FD259 | Cefoxitin supplement | 5管 | 詢(xún)價(jià) |
原理
金黃色葡萄球菌是侵襲性致病菌,能導致人體幾乎任何組織或器官的疾病,特別是對于免疫力不高的人群(1)。葡萄球菌的早期感染采用青霉素治療。但隨著(zhù)時(shí)間的發(fā)展,一些耐藥的金葡菌出現。甲氧西林是下一代可采用的抗生素。盡管甲氧西林對治療大部分葡萄球菌感染有效,但仍有一些葡萄球菌菌株發(fā)展出對甲氧西林的耐藥性,因而被稱(chēng)為耐甲氧西林的金黃色葡萄球菌,簡(jiǎn)稱(chēng)MRSA(2)。那些有皮膚傷口破損、留置導管和燒傷患者,具有容易發(fā)展為MRSA感染的風(fēng)險(3)。在和MRSA感染者接觸后保持個(gè)人衛生,可極大地阻斷MRSA感染的傳播(2)。
培養基中的HiVeg水解物、酵母粉和HiVeg提取物提供必要的氮源、碳源和維生素B族營(yíng)養。MRSA特異性裂解培養基中的顯色混合劑,呈藍綠色菌落。丙酮酸鈉促進(jìn)葡萄球菌生長(cháng)。氯化鈉維持培養基滲透壓平衡。高濃度的氯化鈉同時(shí)抑制伴隨的其他菌群。選擇性添加劑(甲氧西林和頭孢西?。┮种茖籽跷髁置舾械慕鹌暇推渌殡S菌群。
該產(chǎn)品用HiVeg植物蛋白成份替代了動(dòng)物蛋白成份,培養功效*一致,且
(1)批間差異更小
(2)增菌時(shí)由于動(dòng)物蛋白造成的干擾因素更少
(3)避免瘋牛?。?/span>BSE / TSE)、口蹄疫等相關(guān)動(dòng)物病毒的風(fēng)險
(4)對實(shí)驗人員及實(shí)驗環(huán)境更安全
此產(chǎn)品*無(wú)動(dòng)物源成份
用途
分離和選擇性鑒定耐甲氧西林的金黃色葡萄球菌(MRSA)
培養基組成
成分 | g/L |
HiVeg的水解物 | 3.000 |
酵母粉 | 2.500 |
HiVeg提取物 | 2.500 |
氯化鈉 | 40.000 |
丙酮酸鈉 | 5.000 |
顯色混合劑 | 5.300 |
瓊脂 | 15.000 |
終pH(25°C)7.0±0.2 |
配制
41.65 g重懸于 500 ml蒸餾水。加熱至沸騰使*溶解。高壓滅菌15磅(121°C) 15分鐘。冷卻至45-50°C. 無(wú)菌加入1管復溶的甲氧西林(貨號FD229)和1管復溶的頭孢西丁(貨號FD259)以增加選擇性?;靹虿A注平板。
培養反應
加入添加劑后培養35-37°C 18-48小時(shí),結果如下:
菌株(ATCC) | 未加添加劑時(shí)的生長(cháng) | 接種量(CFU) | 回收率 | 菌落顏色 | 加入添加劑后的生長(cháng) | 回收率 |
表皮葡萄球菌(ATCC 12228) | 抑制 | ≥103 | 0% |
| 抑制 | 0% |
金黃色葡萄球菌(ATCC 6538) | 旺盛 | 50-100 | ≥50% | 藍綠色 | 抑制 | 0% |
金黃色葡萄球菌MRSA(ATCC 43300) | 旺盛 | 50-100 | ≥50% | 藍綠色 | 旺盛 | ≥50% |
金黃色葡萄球菌ATCC 25923 | 旺盛 | 50-100 | ≥50% | 藍綠色 | 抑制 | 0% |
大腸桿菌ATCC 25922 | 貧瘠-好 | 50-100 | 30-40% | 紫色 | 抑制 | 0% |
糞腸球菌ATCC 29212 | 不長(cháng)-貧瘠 | 50-100 | ≤10% | 淺綠色 | 抑制 | 0% |
木糖葡萄球菌ATCC 29971 | 旺盛 | 50-100 | ≥50% | 金屬藍 | 抑制 | 0% |
參考文獻
1.DWorkin M et. al 2006. The Prokaryotes (a Handbook on the Biology of Bacteria) 3rd ed, Vol. 2, page 345.
2.Methicillin Resistant Staphylococcus aureus Copyright ã 1997-2005 Canadian Centre for Occupational Health and Safety, Sept 19th, 2005.
3.Dr. Alan Johnson, methicillin resistant staphylococcus aureus (MRSA) infection. The Support group for MSRA sufferers and Dependents, Aug 1st , 2005
產(chǎn)品引用文獻
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2. Dubey, D., et al., Surveillance of infection status of drug resistant Staphylococcus aureus in an Indian teaching hospital.Asian Pacific Journal of Tropical Disease, 2013. 3(2): p. 133‐142.
3. Dubey, D., et al., A report on infection dynamics of inducible clindamycin resistance of Staphylococcus aureusisolated from a teaching hospital in India. Asian Pacific Journal of Tropical Biomedicine, 2013. 3(2): p. 148‐153.
4. Oberoi, L., R. Kaur, and A. Aggarwal, PREVALENCE AND ANTIMICROBIAL SUSCEPTIBILITY PATTERN OFMETHICILLIN‐RESISTANT STAPHYLOCOCCUS AUREUS (MRSA) IN A RURAL TERTIARY CARE HOSPITAL IN NORTH INDIA. SURGERY.21.
5. Sharma, S. and A. Mall, The prevalence, antibiogram and characterisation of methicillin resistant Staphylococcus aureusamong the patients from the Doon Valley hospitals. African Journal of Microbiology Research, 2011. 5(21): p. 3446‐3451.
6. Singh, V., et al., STAPHYLOCOCCUS AUREUS CAUSING WOUND INFECTION.
7.Jawad R. Al-Zaidi. Methicillin Resistant Staphylococcus Aureus (MRSA) Nasal Carriage among Health Care Workers in Intensive Care Units. Medical Journal of Babylon[J]. 2014,11 (3): 749-757 .
8.Poongodi Lakshmi Santhanakumarasamy, Susitha Thankian. Comparison of phenotypic and molecular methods in the detection of methicillin resistant Staphylococcus and its implications. Journal of the Scientific Society[J]. 2015,(42): 166-169.