rrn操纵元序列PCR鉴定术后龟分支杆菌暴发感染的研究

目的　本研究旨在采用分子生物学技术 ,从基因水平上确认医院内术后暴发感染的致病菌 ,并建立一套快速的PCR方法鉴定龟分支杆菌脓肿亚种。方法　根据分支杆菌的rrn操纵元序列即 16srDNA和 16s - 2 3srDNA间隔区序列 ,分别设计合成一对引物 ,采用聚合酶链反应技术 ,并以结核分支杆菌和常见速生长非结核分支杆菌作对照 ,对临床分离株进行PCR扩增 ,并根据DNA带的大小和数量鉴定分支杆菌。结果　 5 3株龟分支杆菌脓肿亚种临床分离株和标准株 ,用16srDNA扩增 ,均被扩增出一条特异的 5 84bpDNA带 ,相应的 16s - 2 3srDNA扩增 ,为特异的380bpDNA带。而速生长的非结核分支杆菌均扩增出不同大小的 1或 2条DNA带。 结论　基因水平上确认此次引起医院内术后暴发感染的致病菌为龟分支杆菌脓肿亚种。rrn操纵元PCR扩增检测体系灵敏、特异 ,能鉴定龟分支杆菌脓肿亚种临床株 ,并与其它速生长分支杆菌区别开。     

非结核性分支杆菌皮肤感染63例临床分析

目的 探讨皮肤软组织肌注后龟分支杆菌皮肤感染的临床特点、诊断和治疗手段。方法 分析2000年12月42001年3月63例非结核性分支杆菌皮肤感染患的临床表现、病理、B超、药物敏感试验、治疗结果。结果 63例患的99处感染灶可分为混合溃疡型51例次，脓肿型28例次，硬结型16例次，蜂窝织炎型4例次。病理显示为肉芽肿、类结核结节占多数。其中38例经细菌培养证实为龟分支杆菌感染。全部病例经敏感抗菌药和抗结核药联合应用及外科治疗后6～8个月痊愈。结论 皮肤软组织龟分支杆菌感染暴发流行很罕见，临床表现多样化，易反复，病程长，对多种抗菌药物耐药，治疗困难。     

The histopathologic spectrum of decorative tattoo complications

Tattooing for ornamental purposes is an ancient practice that remains popular in modern times. Tattoos are encountered by the dermatopathologist either as incidental findings on skin biopsies or because of complications specific to the tattoo. A range of neoplasms and inflammatory conditions are seen in association with tattoos, many of which may be attributed to hypersensitivity to tattoo inks. The composition of tattoo inks is highly variable, and inks can contain numerous potentially allergenic or carcinogenic compounds. Infections with bacterial, viral and fungal species can occur after tattooing, sometimes after substantial delay. Atypical mycobacterial infections in particular are increasingly reported; special stains for mycobacteria should be performed and cultures recommended particularly when dense, mixed or granulomatous infiltrates are present.     

鸟-胞内分枝杆菌复合群与龟-脓肿分枝杆菌肺病并发支气管扩张的CT征象比较

目的 探讨鸟-胞内分枝杆菌复合群(MAC)肺病与龟-脓肿分枝杆菌肺病并发支气管扩张患者CT征象的差异,提高对两种疾病并发支气管扩张的鉴别诊断水平。 方法 搜集2017年1—12月在广州市胸科医院门诊及住院治疗并经临床确诊的25例并发支气管扩张的鸟-胞内分枝杆菌复合群肺病患者(简称“A组”)和26例并发支气管扩张的龟-脓肿分枝杆菌肺病患者(简称“B组”),两组患者均为初诊或未经抗结核和抗非结核分枝杆菌(NTM)治疗。对两组患者的CT扫描资料进行回顾性分析,主要就两组患者支气管扩张(CT分型、分布)、肺内病灶的形态(微结节、树芽征、结节、实变等)、伴发空洞(类型、分布)的CT征象特点及并发症发生情况进行对比分析。 结果 B组左肺下叶支气管扩张、左肺下叶微结节、肺体积收缩的比率分别为57.69%(15/26)、84.62%(22/26)、61.54%(16/26),均明显高于A组[分别为28.00%(7/25)、56.00%(14/25)、32.00%(8/25)],差异均有统计学意义(χ ²值分别为4.58、5.03、4.46,P值分别为0.032、0.025、0.035)。A组柱状型支气管扩张占52.00%(13/25),高于B组(15.38%,4/26);B组囊状型支气管扩张占50.00%(13/26),高于A组(16.00%,4/25),差异均有统计学意义(χ ²值分别为7.69、6.63,P值分别为0.006、0.010)。结论 龟-脓肿分枝杆菌肺病患者的CT表现中,左肺下叶支气管扩张、左肺下叶微结节、肺体积收缩的发生率高于MAC肺病患者;龟-脓肿分枝杆菌肺病多并发囊状型支气管扩张,而MAC肺病多并发柱状型支气管扩张,以上特征性CT征象有助于两种疾病的鉴别。     

Atypical mycobacterium keratitis

We present two cases of Mycobacterium chelonae keratitis, both of which followed minor corneal trauma. One case initially showed improvement with medical therapy alone but eventually required penetrating keratoplasty. The second case required surgical intervention to provide tectonic support, but the infection resolved with antibiotic therapy.     

Visual Recovery Following Mycobacterium chelonae Endophthalmitis

Following uncomplicated cataract surgery, a patient receiving etanercept for psoriatic arthritis developed Mycobacterium chelonae endophthalmitis. Vitrectomy, capsulectomy, and intraocular lens removal was followed by intravitreal amikacin, topical gatifloxacin, intravenous imipenem, and oral clarithromycin for six months. The patient achieved a final corrected visual acuity of 20/20. Etanercept has been implicated in the development of numerous, severe granulomatous infections, though not previously with M. chelonae. This represents the first reported case of visual recovery following M. chelonae endophthalmitis.     

手术切口非结核分枝杆菌病的声像图表现

目的 探讨手术切口软组织非结核分枝杆菌病的超声表现。方法 应用Ｂ超高频探头对１４３例术后切口龟型脓肿亚型非结核分枝杆菌的局部进行超声检查。结果 声像图正常１３例,异常１３０例。轻度（９１例）病灶局限于浅筋膜层,中度（２３例）深达肌层,重度（１６例）累及腹腔,内脏或脓肿≥２．０ｃｍ。以不规则低咽声,脓肿混合性低回声,窦道回声等为共同声像图表现。结论 异常声像图与病灶的形态,分布,原手术方式及因手术造     

非结核性分枝杆菌性兔角膜炎的研究

目的　探讨非结核性分枝杆菌（NTM）性兔角膜炎的临床表现与不同时期的病理变化。方法48只兔（48只眼）随机分为3组：角膜瓣下NTN感染组（UFI组）、角膜瓣下NTM感染后糖皮质激素使用组（UFIC组）及角膜表面NTM感染组（sI组）。观察角膜基质浸润情况,并于术后5、7、14及21d进行角膜病灶细菌定量培养、组织病理学及免疫组织化学检查。结果兔NTM角膜炎在感染后5d角膜组织反应性水肿;7—14d角膜浅基质层出现多灶性点、片状灰白致密浸润;21d角膜新生血管大量增生,白斑形成。术后5、7、14及21d,3组模型角膜基质浸润面积比较差异有统计学意义（F=19．224,P〈0．05）;组间比较,UFIC组角膜浸润面积大于UFI组与SI组,差异均有统计学意义（F=9．362,8．341;均P〈0．05）。角膜细菌定量培养,UFIC组细菌数量高于UFI组与SI组,3组间比较差异均有统计学意义（F=411．272,P〈0．05）。病理学观察,感染后5d角膜基质层大量中性粒细胞浸润,7～14d角膜淋巴细胞灶性浸润,21d角膜成纤维细胞和新生血管增生明显。3组模型于术后5、7、14及21d角膜组织中CD4’细胞计数差异均有统计学意义（F=21．907,196．521,12．552,11．100;均P〈0．01）,CD8^＋细胞计数在感染后7、14d差异均有统计学意义（E=171．115,77．017;均P〈0．01）。结论角膜基质多灶性点、片状灰白致密浸润为NTN性角膜炎临床特征,CD4^＋细胞介导的细胞免疫反应在本感染中起重要作用。（中华跟科杂志,2007,43：613-617）     

Spondylitis following bloodstream dissemination of Mycobacterium chelonae disseminated in an immunocompetent patient: a case report and literature review

Non-tuberculous mycobacterial spondylitis is a rare spinal infection, especially among patients without acquired immunodeficiency syndrome or other immune impairments. Because of its rarity and non-specific clinical manifestations, diagnosis is often delayed or missed. Here, we present a case of Mycobacterium chelonae spondylitis in an immunocompetent patient and review the relevant literature.     

Mycobacterium chelonae cutaneous infection in a patient with mixed connective tissue disease

Around 50 mycobacteria species cause human disease. Immunosuppressive states predispose to non-tuberculous mycobaterium infection, such as Mycobacterium chelonae: AFB, non-tuberculous, fast growth of low virulence and uncommon as a human pathogen. It may compromise the skin and soft tissues, lungs, lymph nodes and there is also a disseminated presentation. The diagnosis involves AFB identification and culture on Agar and Lowenstein-Jensen medium base. A 41-year-old female with MCTD (LES predominance) is reported, presenting painless nodules in the right forearm. She denied local trauma. Immunosuppressed with prednisone and cyclophosphamide for 24 months. Lesion biopsy has demonstrated positive bacilloscopy (Ziehl-Neelsen stain) and M.chelonae in culture (Lowenstein-Jensen medium base), therefore clarithromycin treatment has been started (best therapy choice in the literature).