Acute bacterial rhinosinusitis and its complications in our pediatric otolaryngological department between 1997 and 2006

Objective

A retrospective survey of the number, age, gender, month of admission, type of persistent acute bacterial rhinosinusitis and case history of pediatric patients who did not respond to conservative therapy, and of those who suffered from complications of acute sinusitis.

Methods

The case charts of all children (<19 years of age) admitted to our department between January 1, 1997 and December 31, 2006 with persistent acute bacterial rhinosinusitis that within 14-26 days against the course of appropriate conservative therapy have not recovered and complications of acute sinusitis were subjected to a retrospective review.

Results

Of the 339 patients 182 were admitted with persistent acute bacterial rhinosinusitis and did not respond to conservative therapy and 157 children were diagnosed with secondary complications of acute sinusitis. Males predominated overall (54.8%). The most endangered age range was between 3 and 6 years. The highest number of admissions occurred in March. The maxillary sinus was most frequently involved. Orbital complications were observed in 150 patients: 126 cases of preseptal cellulitis, 9 of orbital cellulitis, 4 of subperiosteal abscess, and 11 of orbital abscess. Further two children were diagnosed with intracranial complications, four patients presented with osteomyelitis and the remaining one exhibited mucocele. Streptococcus pneumoniae was the most commonly cultured pathogen. There were no mortalities, and morbidity occurred in only two cases. The topicality and importance of this subject are illustrated by taking into account of two cases.

Conclusions

The complications of acute rhinosinusitis are challenging, but the prognosis can be favorable. Early diagnosis and surgical drainage procedures in conjunction with aggressive medical management remain the standard of care for these critically ill patients.     

慢性鼻-鼻窦炎细菌生物膜形态观察

目的 观察慢性鼻-鼻窦炎患者,鼻内镜所取钩突、筛泡或上颌窦黏膜样本是否存在细菌牛物膜及其形态特征.方法 本实验共取鼻内镜术中黏膜样本12份,实验组为慢性鼻.鼻窦炎鼻内镜手术患者6例,对照组为阻塞性睡眠呼吸暂停综合征鼻内镜手术患者6例.样本用标准的扫描电镜方法 处理.实验组详细记录患者的年龄、性别、症状、鼻窦CT、鼻内镜检查和变应原皮肤点刺试验结果 .结果 扫描电镜下见慢性鼻一鼻窦炎患者鼻腔鼻窦黏膜纤毛缺失、倒伏、排列紊乱,实验组中5例可见不同形成阶段、各种形态的细菌生物膜,1例可见丝状真菌样结构.实验组细菌生物膜出现率为83.3%.对照组6例均未观察到细菌生物膜.结论 慢性鼻-鼻窦炎鼻腔鼻窦黏膜纤毛有不同程度的损伤,黏膜表面存在处于生命周期不同阶段的细菌牛物膜.     

Demonstration of biofilm in human bacterial chronic rhinosinusitis

BACKGROUND: Bacterial biofilms may explain why some patients with bacterial chronic rhinosinusitis (CRS) improve while on antibiotics but relapse after completion of the antibiotic. In the human host, biofilms exist as a community of bacteria surrounded by a glycocalyx that is adherent to a foreign body or a mucosal surface with impaired host defense. Biofilms generate planktonic, nonadherent bacterial forms that may metastasize infection and generate systemic illness. These planktonic bacteria are susceptible to antibiotics, unlike the adherent biofilm. METHODS: We reviewed four cases of CRS using transmission electron microscopy (TEM) to assay for typical colony architecture of biofilms. Bacterial communities surrounded by a glycocalyx of inert cellular membrane materials consistent with a biofilm were shown in two patients. RESULTS: In the two patients without biofilm, a nonbacterial etiology was discovered (allergic fungal sinusitis) in one and in the other there was scant anaerobic growth on culture and the Gram stain was negative. Culture of the material from the biofilm grew Pseudomonas aeruginosa in both patients. Pseudomonas from the biofilm showed a glycocalyx, not present in Pseudomonas cultured for 72 hours on culture media. Both patients' symptoms with bacterial biofilms were refractory to culture-directed antibiotics, topical steroids, and nasal lavages. Surgery resulted in cure or significant improvement. CONCLUSION: Biofilms are refractory to antibiotics and often only cured by mechanical debridement. We believe this is the first TEM documentation of bacterial biofilms in CRS in humans.     

慢性鼻-鼻窦炎鼻息肉患者细菌生物膜的观察

目的 观察慢性鼻-鼻窦炎鼻息肉患者手术黏膜组织中细菌生物膜的形态特征,并分析其与临床因素、术后疗效的关系.方法 试验组获取72例慢性鼻-鼻窦炎鼻息肉患者手术中筛窦黏膜组织,对照组获取15例鼻中隔偏曲患者、10例鼻骨骨折患者钩突黏膜组织(患者均知情同意),所有组织标本均行扫描电镜检查.对两组患者进行术后随访,分别应用Lund-Kennedy鼻内镜检查、慢性鼻窦炎疗效评定标准(1997年,海口)评估患者病情改善程度.采用t检验分析细菌生物膜对术后Lund-Kennedy评分的影响;采用卡方检验分析细菌生物膜与内镜手术疗效的相关性,以P＜0.05为差异有统计学意义.结果 试验组72例慢性鼻-鼻窦炎鼻息肉患者中有3例患者失访,失访率为4.2%.69例慢性鼻-鼻窦炎鼻息肉患者的细菌生物膜阳性率71.0%(49/69),并且可以观察到黏膜组织纤毛不同程度的损伤.对照组未发现细菌生物膜,可以观察到黏膜纤毛较浓密,排列整齐.卡方检验结果显示,性别、慢性鼻-鼻窦炎鼻息肉类型、病程等因素在试验组细菌生物膜阴性组与阳性组间差异无统计学意义(P值均＞0.05).细菌生物膜阳性组患者术后6个月和12个月的Lund-Kennedy 评分(4.78 ±1.67;4.55 ±1.61)分别高于细菌生物膜阴性组患者(3.65 ±1.39;3.65 ±1.18),差异均有统计学意义(t=-2.654,P＜0.01;t=-2.264,P＜0.05);细菌生物膜阴性组术后6个月和12个月的疗效明显优于细菌生物膜阳性组,差异有统计学意义(x2值分别为18.014、22.063,P值均＜0.001).结论 慢性鼻.鼻窦炎鼻息肉患者手术黏膜组织中存在细菌生物膜的生命周期不同形态,细菌生物膜的存在与否,与慢性鼻-鼻窦炎鼻息肉的类型、性别、病程无明显相关.细菌生物膜可能对患者术后疗效产生不良的影响.

Abstract：

Objective To explore the presence of bacterial biofilms(BF) in patients with CRS and the effect of BF on clinical symptoms and postoperative outcomes.Methods Seventy-two patients with chronic sinusitis were enrolled in this study.The control group included 15 patients with deviation of the nasal septum and 10 patients had a fracture of the nasal bone.Mucosa of the uncinate process or ethmoid near the ostium of the maxillary sinus was obtained during endoscopic sinus surgery.The specimens were subjected to scanning electron microscopy.Patients were followed for 1 year and observed by the LundKennedy endoscopy,and the Haikou standard classification (ESS-1997).Statistical analysis was performed by t-test or chi-square test Results Three patients were lost to follow-up.The scanning electron microscopy analysis showed bacterial biofilms in 49 of the 69 patients with chronic sinusitis.A marked destruction of the epithelium and cilia was observed in samples positive for bacterial biofilms.No bacterial biofilms were detected in the control group,and scanning electron microscopy showed normal epithelium and cilia in those specimens.There was no significant difference in gender,classification or duration of disease between the BF(-) and BF( + ) groups.At six months and one year postoperative,the Lund-Kennedy endoscopy scores for CRS patients with BF(4.78 ± 1.67 ;4.55 ± 1.61) were significantly higher than those without BF(3.65 ±1.39;3.65 ±1.18) (t =-2.654,P＜0.01;l =-2.264,P＜0.05).Based on the Haikou standard classification,there was a significantly difference between patients with BF and those without BF( x2 = 18.014,22.063 ,P ＜ 0.001,respectively).Conclusions Different life stages of bacterial biofilms were demonstrated to be present in CRS.Gender,classification or duration of disease did not affect the presence of bacterial biofilms in patients with CRS.There is a correlation between bacterial biofilms and an unfavorable outcome in patients with CRS after ESS.     

Evaluation of the ability of an experimental model to induce bacterial rhinosinusitis in rabbits

IntroductionFor decades, animals have been used in sinonasal experimental models, and the practice has increased substantially in the last few years. This study aimed to assess the pathogenesis of infectious process and medication efficiency to treat rhinosinusitis.ObjectiveTo evaluate the efficiency of the proposed experimental model to induce an acute bacterial sinonasal infectious process through histological analysis and sinus secretion cultures.MethodsThis was an experimental study with 22 New Zealand rabbits, divided into: group A (six rabbits), group B (seven rabbits), group C (seven rabbits), and group D (control group with two rabbits). Rhinosinusitis was induced by the insertion of a synthetic sponge into the right nasal cavity of 20 animals (study groups), followed by the instillation of bacterial strains (50% Staphylococcus sp. and 50% Streptococcus sp.). The groups were euthanized within 10 days (group A), 17 days (group B), and 30 days (groups C and D).ResultsAll the rabbits of the study group developed acute bacterial rhinosinusitis, which was diagnosed through macroscopic evaluation, histological analysis, and sinus secretion culture.ConclusionThe proposed model is technically simple to perform, it is similar to the rhinogenic model in human beings, and it is highly efficient to reproduce an acute bacterial sinus infection.     

Therapeutic choices in the treatment of acute community-acquired bacterial rhinosinusitis

BACKGROUND: Acute bacterial rhinosinusitis (ABRS) is a common medical problem affecting a large percentage of the population. The disease will most often follow a viral upper respiratory tract infection. METHODS: Appropriately diagnosed, ABRS is best treated with antibiotics, but other medications may play a role in some circumstances. Increasing antibiotic resistance to the common bacteria causing ABRS has occurred in the past 20 years, driven largely by inappropriate or unnecessary antibiotic use. RESULTS: There are many antibiotics available that may be used for the treatment of ABRS. The selection of the best antibiotic option is determined by evaluating a number of factors, with the potential antibiotic resistance being an important consideration. CONCLUSION: This article reviews current recommendations for the antibiotic treatment of ABRS.     

重组活化基因1缺陷鼠和正常小鼠急性细菌性鼻窦炎模型的比较研究

目的　探讨C5 7BL/ 6J 重组活化基因 1(recombinantactivegene 1,Rag1)敲除鼠 (简称Rag1小鼠 )和C5 7BL/ 6 (C5 7)小鼠急性细菌性鼻窦炎的自然感染过程及二者之间的差别。方法　Rag1缺乏鼠和C5 7小鼠各 10只 ,采用鼻孔内接种肺炎链球菌T5 9,另外 4只接种大豆肉汤作对照。分别于接种2d(各 2只 )、5d(各 4只 )、10d(各 2只 )、14d(各 2只 )处死动物 ,对照组于第 5天处死。处死前作鼻腔灌洗培养 ,头颅石蜡包埋 ,连续切片 ,Luna染色 ,计算机辅助光镜观察 ,计算窦腔内中性粒细胞集落所占窦腔的百分率和每平方毫米窦腔黏膜中浸润的多形核白细胞数。结果　接种 5dRag1小鼠和C5 7小鼠窦腔感染均达到高峰 ,窦腔中白细胞集落和黏膜中白细胞数均明显高于对照组 (P <0 0 5 ) ,10d后C5 7小鼠窦腔感染逐渐减轻 ,14d后基本控制 ,而Rag1小鼠感染持续存在 ,与C5 7比较差异有显著性(P <0 0 5 ) ,14d后鼻灌洗液中仍培养出肺炎链球菌。结论　采用肺炎链球菌T5 9鼻内接种法成功地诱导出Rag1和C5 72种小鼠急性鼻窦炎 ,肺炎链球菌在C5 7小鼠鼻腔鼻窦内的感染可被完全、自主、快速控制 ,但Rag1小鼠则不能完全控制这种感染 ,并有演变成慢性炎症的倾向 ,提示T和B淋巴细胞依赖性免疫功能在清除细菌感染中起着关键的作用 ,基因敲除     

慢性鼻-鼻窦炎的微生态Meta分析

明确慢性鼻-鼻窦炎患者鼻腔的菌群分布情况,为指导慢性鼻-鼻窦炎的诊疗提供依据。     

细菌生物膜在慢性鼻-鼻窦炎发病机制中的作用

慢性鼻-鼻窦炎（chronic rhinosinusitis，CRS）是耳鼻喉科最常见的疾病，也是全身常见的慢性疾病之一。在美国有2920万成人发病，占总人口14．2％。据统计，每年的药物、手术费用和因病造成的工作收入减少总计达60亿美元。CRS的病因和病理生理机制仍不清楚，因此目前尚缺乏有效的治疗方法。尽管CRS的药物和手术治疗取得很大进展，但仍存在一些难治性病例。因此，人们认为CRS的持续存在可能涉及其他一些未知因素。本文综述了有关细菌生物膜及其在CRS发病机制研究的最新进展。     

A comparative experimental study between recombinant active gene 1-deficient mice and C57BL/6 mice model of acute bacterial rhinosinusitis]

OBJECTIVE: To explore the infective course of acute bacterial rhinosinusitis in recombinent active gene 1 (Rag 1)-defecient mice (Rag1) and C57BL/6 mice (C57) and the difference between them after intranasal streptococcus pneumoniae inoculation. METHODS: Ten mice of each strain (Rag1 and C57) received Streptococcus pneumoniae strain T59, ATCC 49,619 suspended in trypticase soy broth, and controls (two mice for each strain) received trypticase soy broth alone. After 2, 5, 10 and 14 days, nasal lavage cultures were obtained and then the mice were killed. The heads were embedded with paraffin and serial sections were made for histological analysis. The percentage of sinus cavity occupied by neutrophil cluster (% cluster) and the number of polymorphonuclear leukocytes per square millimeter of sinus mucosa (PMN/mm2) were calculated by the use of a computer-aided microscope in conjunction with a reconstruction and image analysis system. RESULTS: % Cluster and PMN/mm2 in infected mice both of Rag1 and C57 appeared to peak on five and ten days separately, which were significantly heavier than those in controls(P < 0.05). The infection in C57 decreased by two weeks. But in contrast to C57, the infection in Rag1 had not been controlled and Streptococcus pneumoniae were still seen in the nasal lavage culture by two weeks. This difference between infected Rag1 and infected C57 was significant at P < 0.05. CONCLUSION: Acute bacterial rhinosinusitis in Rag1 and C57 mice were successfully induced by intranasal inoculation of streptococcus pneunoniae. This bacterial infection in C57 could be controlled completely and rapidly. In contrast, Rag1 failed to control rhinosinusitis and had a tendency to chronic inflammation, suggesting that T- and B-cell-dependent immunity was important for clearance of bacteria from rhinosinus and gene knockout mice was a convenient tool for investigation of the pathogenesis of experimental rhinosinusitis.     

Antimicrobial guidelines for the treatment of acute bacterial rhinosinusitis in immunocompetent children

Acute rhinosinusitis represents a condition for which educational efforts could help minimize the inappropriate use of antibiotics, particularly for children. The majority of acute rhinosinusitis cases are of viral etiology and thus, are self limiting. Although bacterial infection complicates a small number of cases, the lack of accessibility to the sinus, the limitations of diagnostic modalities and the lack of specificity among signs and symptoms often make it difficult to determine when bacterial infection occurs. Furthermore, antimicrobial resistance among the pathogens that frequently cause bacterial infection complicates the election of empiric therapy. The Sinus and Allergy Health Partnership recently developed and published antimicrobial guidelines to provide practitioners in the US with recommendations for the diagnosis and treatment of acute bacterial rhinosinusitis. The purpose of this paper is to review the rationale behind the development of these guidelines and how they apply to the management of acute bacterial rhinosinusitis in children.     

Efficacy/safety of amoxicillin/clavulanate in adults with bacterial rhinosinusitis

PURPOSE: Acute bacterial rhinosinusitis (ABRS) is a common and uncomfortable condition, frequently caused by Streptococcus pneumoniae or Haemophilus influenzae. Antibacterial resistance among these and other common respiratory pathogens is now widespread and of concern. Pharmacokinetically enhanced amoxicillin/clavulanate 2000/125 mg was developed to be effective against the common respiratory pathogens, including many resistant strains. MATERIALS AND METHODS: This open-label, noncomparative study assessed the bacteriologic and clinical efficacy of amoxicillin/clavulanate 2000/125 mg in adult patients with ABRS. Requirements for study entry included a clinical diagnosis of ABRS supported by radiologic findings. In addition, sinus puncture for bacteriologic assessment was required at study entry. RESULTS: Overall, bacteriologic success (eradication or clinical evidence of eradication) at the follow-up visit (days 17-28) was achieved in 87.8% (722/822) of patients with 1 or more pathogen isolated at screening, in 93.2% (246/264) of patients with S pneumoniae, in 96.7% (29/30) of those with penicillin-resistant S pneumoniae (penicillin minimum inhibitory concentrations >or=2 microg/mL), and in 88.7% (110/124) of patients with beta-lactamase-positive pathogens. Bacteriologic success was achieved against 6 of 7 S pneumoniae isolates with amoxicillin/clavulanic acid minimum inhibitory concentrations of 4/2 microg/mL or higher. CONCLUSIONS: Amoxicillin/clavulanate 2000/125 mg was generally well tolerated. This new amoxicillin/clavulanate formulation provides a suitable option for empiric therapy for ABRS in adults.     

Nasal histamine challenge: a method to predict the efficiency of antihistamine treatment.

Nasal histamine challenge (NHC) was performed on patients suffering from chronic rhinitis. The histamine was administered to the nose in the form of a spray. One hundred sixty-eight patients and 20 healthy subjects were examined. The histamine was sprayed into the nose in seven metered doses, from 0.03 mg to 3 mg. The nose was examined before and 4 minutes after each challenge. A positive reaction to challenge was indicated when the conchae swelled to the point that they impinged against the septum. We found that some patients reacted to a low dose of histamine (0.03 mg to 0.15 mg) while our control group and some other patients reacted positively only to higher doses of histamine (3 mg or more). After the first tests, NHC patients were randomly divided into two groups. One group was treated with placebo and the other group with antihistamines. Three weeks later another NHC was performed (now under treatment) and revealed that patients reacting to low doses of histamine improved significantly with antihistamine treatment, while those reacting to a high dose did not respond to antihistamines. We found the NHC to be a simple test with no complications, and one that is easily tolerated by patients, including children. Nasal histamine challenge helps to identify which patients will improve with antihistamine treatment and aids the evaluation of its efficacy.     

慢性鼻-鼻窦炎小鼠模型及应用现状

慢性鼻-鼻窦炎(CRS)是上呼吸道常见的慢性炎症性疾病,严重影响了患者生活质量,目前其发病机制尚不明确。CRS的动物模型是研究人类CRS病理机制和疗效的理想手段。小鼠是目前CRS常用的造模动物。就小鼠CRS的造模方法、模型评价指标及模型的应用现状等做研究综述。