Staphylococcus aureus superantigens are associated with chronic rhinosinusitis with nasal polyps: a meta-analysis

Chronic rhinosinusitis with nasal polyps (CRSwNP) is a common health problem in the world. However, its etiology remains unclear. Recent researches have hypothesized that Staphylococcus aureus (SA) exotoxins which act as superantigens might be associated with inflammatory mucosal changes seen in CRSwNP. The objective of this study is to evaluate the relationship between Staphylococcus aureus superantigens and CRSwNP. PubMed, MEDLINE, EMBASE, Cochrane Library and CNKI were searched to collect the case–control studies on the relationship between SA superantigens and CRSwNP from the date of establishment of the databases to May 2013. The extracted data were analyzed by RevMan 5.0. The main outcome measures were SA culture-positive rate, the detection rate of SA superantigens and its specific IgE. Twelve studies including 340 cases and 178 controls were selected. The results showed that SA culture-positive rate in the CRSwNP group was significantly higher than that in the control group (OR 4.85, 95 % CI 1.80–13.05, P = 0.002), the detection rate of SA superantigens and its specific IgE in the CRSwNP group were both significantly higher than that in the control group (OR 12.07, 95 % CI 4.57–31.90, P < 0.00001; OR 17.03, 95 % CI 5.43–53.39, P < 0.00001, respectively) and the CD4⁺ T cell counts and Lund-Mackay CT scores were statistically higher in the IgE-positive group than in the IgE-negative group (MD 16.26, 95 % CI 4.86–27.67, P = 0.005, MD 2.43, 95 % CI 0.39–4.48, P = 0.02, respectively). However, the eosinophil and CD8⁺ T cell counts showed no difference between IgE-positive group and -negative group. This meta-analysis indicated that the SA superantigens may be a risk factor for CRSwNP, and the presence of SA superantigen is related to the disease severity of CRSwNP.     

Nasopharyngeal aerobic bacterial flora and Staphylococcus aureus nasal carriage in deaf children

OBJECTIVE: To determine the nasopharyngeal aerobic bacterial flora and Staphylococcus aureus nasal carriage in deaf children and the role of flora in deafness. STUDY DESIGN: A prospective, controlled study. METHODS: Nasopharyngeal and nasal swabs were collected from 87 deaf children with acquired etiology at Zonguldak primary school for the deaf and 56 healthy children. The children with genetic base (syndromic or nonsyndromic, familial or sporadic, AD, AR or X-linked recessive), and also with the history of drug exposure, head trauma, birth trauma, prematurity, hyperbilirubinemia and the viral diseases with high fever (like mumps and measles) were excluded from the study. Swabs were inoculated on to a variety of bacteriological culture media, which were then incubated in an appropriate atmosphere. Colonisation of Group A beta hemolytic streptococcus, Streptococcus pneumoniae, Haemophilus influenzae, Neisseria menengitidis, Moraxella catarrhalis and S. aureus in upper respiratory tract were investigated. Antimicrobial susceptibility testing of the isolates were determined according to National committee for clinical laboratory standards (NCCLS) guidelines. RESULTS: Although, the rates of colonization of the nasopharyngeal aerobic bacteria and nasal S. aureus did not differ significantly between deaf children and normal healthy subjects, less colonization rates were found in deaf children than normal healthy subjects. S. aureus was isolated from 18 (20.7%) deaf children. All S. aureus isolates from deaf children were susceptible to oxacillin. Penicillin susceptibility rate was 22.2%. CONCLUSION: It is considered that nasopharyngeal and nasal colonizations of deaf children with potentially pathogenic aerobic bacterial flora is not a significant risk factor for acquired infections when compared with healthy children.     

Identification of nasal bacterial flora profile and carriage rates of methicillin-resistant Staphylococcus aureus in patients with allergic rhinitis

The aim of the present study was to evaluate the effect of allergic rhinitis (AR) on the nasal flora and colonization rates of resistant microorganisms in comparison to healthy individuals. This colonization may be important in terms of AR-related disorders, the resistant microorganisms’ carriage, and its complications and co-morbidities. The study was performed with two groups. The study group was composed of 54 adult patients with AR. The control group was composed of 50 healthy individuals. None of the individuals in both groups have used any antibiotics, local or systemic steroid within the last month. Composition of bacterial nasal flora and carriage rates of methicillin-resistant Staphylococcus aureus (MRSA) were evaluated with conventional methods by taking nasal smears with a swab. In the study group, methicillin-sensitive coagulase-negative staphylococci (MRCNS) were detected in 30 %; whereas diphtheroids in 25 %, methicillin-resistant coagulase-negative staphylococci in 13 %, methicillin-sensitive S. aureus in 9 %, methicillin-resistant S. aureus in 3.7 %, and extended-spectrum beta lactamases-positive gram-negative bacilli (GR-ESBL+) in 3.7 % were detected. In the control group, methicillin-sensitive coagulase-negative staphylococci were detected in 54 %; whereas diphtheroids in 21 %, methicillin-resistant coagulase-negative staphylococci in 1.5 %, methicillin-sensitive S. aureus in 16 %, methicillin-resistant S. aureus in 1.5 %, Gr-ESBL(?) in 4 %, and viridians streptococci in 3 % were detected. It is found that the MRSA and MRCNS colonization is higher in patients with AR. This colonization may be important in terms of AR-related disorders, the resistant microorganisms’ carriage, and its complications and co-morbidities in comparison to healthy subjects.     

The effect of triamcinolone acetonide aqueous nasal spray on the nasal carriage of Staphylococcus aureus

BACKGROUND: In this study we aimed to investigate the effect of triamcinolone acetonide aqueous (TAA) intranasal spray that was used for 2 months to treat allergic rhinitis (AR) on the nasal carriage of Staphylococcus aureus (NCSA). METHODS: A total of 125 adult AR patients (study group) and 133 healthy individuals (control group) were enrolled for the study. The subjects were diagnosed with AR after a detailed history, physical examination, and prick testing. The AR subjects were administered TAA in a daily dosage of a 220-microg intranasal route. Nasal cultures were obtained on the 1st (baseline), 55th, and 60th days, and the subjects in the last two cultures of whom S. aureus was detected were accepted as NCSA. RESULTS: After all exclusion criteria were used, 110 AR and 114 control group subjects were enrolled in the study. Based on the culture results that were obtained on the 55th and 60th days, 10 (%9.1) patients from the study group and 18 (%15.7) individuals from the control group were defined to be NCSA (p > 0.05). CONCLUSION: We conclude that the use of TAA treatment for AR does not increase the prevalence of NCSA. However, additional studies with a larger series are required to explain the effects of steroids on nasal colonization of S. aureus.     

金黄色葡萄球菌在变应性鼻炎和慢性鼻窦炎伴鼻息肉中的研究进展

金黄色葡萄球菌（金葡菌）定植与变应性鼻炎（AR）和慢性鼻窦炎伴鼻息肉（CRSwNP）的加重及预后密切相关。本文详细阐述了金葡菌造成AR及CRSwNP难以控制的机制,同时概括性描述了金葡菌在AR和CRSwNP患者的局部定植情况及对血清炎症的影响。     

Methicillin-resistant Staphylococcus aureus infections in acute rhinosinusitis

OBJECTIVE/HYPOTHESIS: Methicillin-resistant Staphylococcus aureus (MRSA) has recently become a serious problem in various fields of medicine. However, it has rarely been studied in acute rhinosinusitis. The aim of this study was to identify the clinical manifestations and treatment outcome of community-acquired methicillin-resistant S. aureus in acute rhinosinusitis. STUDY DESIGN: This was a prospectively collected case series. METHODS: Since 2000, we have launched a prospective long-term study for bacteriology, drug susceptibility, and their changing trend in acute rhinosinusitis. Patients with the diagnosis of acute rhinosinusitis were enrolled from October 2000 through March 2003. Their middle meatus discharge was taken for aerobic culture. Antibiotic sensitivity test was performed for each isolate. RESULTS: A total of 601 patients with the diagnosis of acute rhinosinusitis were included in this study. MRSA was isolated in 16 specimens. Its prevalence rate in acute rhinosinusitis was 2.7% (16 of 601). Multiple pathogens were more frequently found in children with MRSA infection. Five of seven adults had previous nasal procedures. Eight of nine children had a history of antibiotic use. Except for two patients without follow up, the remaining 14 patients resolved after receiving oral antibiotics according to culture results. CONCLUSIONS: The incidence of MRSA infection in acute rhinosinusitis was 2.7% in our study. The most important risk factor was nasal surgeries in adults and previous antibiotic use in children. The treatment outcome of community-acquired MRSA was excellent with oral antibiotics.     

慢性鼻窦炎鼻息肉患者血清金黄色葡萄球菌肠毒素IgE抗体检测

目的检测慢性鼻窦炎伴和不伴鼻息肉患者金黄色葡萄球菌肠毒素(Staphylococcus aureus enterotoxins,SEs)A、B、C型的血清特异性IgE抗体,探讨SEs在慢性鼻窦炎、鼻息肉发病中的作用。方法研究对象包括慢性鼻窦炎不伴鼻息肉(CRSsNP)患者30例、慢性鼻窦炎伴鼻息肉(CRSwNP)患者40例和健康对照组30例,应用ImmunoCAP100E系统检测血清SEA、SEB和SEC特异性IgE水平,并采用统计学软件SPSS11.0进行分析。结果 CRSsNP和CRSwNP患者的血清SEB特异性IgE水平较之对照组均明显增高,差异有统计学意义(P0.05),而血清SEA和SEC特异性IgE水平未见明显升高(P0.05)。结论金黄色葡萄球菌感染产生的肠毒素B(SEB)在慢性鼻窦炎、鼻息肉的发病过程中发挥一定作用。     

Intracellular residency is frequently associated with recurrent Staphylococcus aureus rhinosinusitis

AIM: The prevalence of intracellular Staphylococcus aureus organisms in the nasal mucosa of patients with recurrent infectious rhinosinusitis episodes was studied. METHOD: Twenty-seven consecutive adult patients who failed medical management of chronic rhinosinusitis (CRS) of multiple origins, associated or not with nasal polyposis, were consecutively enrolled for endonasal sinus surgery (including partial middle turbinectomy, middle antrostomy, ethmoidectomy, sphenoidotomy) and followed for a 12-month post-operative period. RESULTS: Seventeen of these patients showed the presence of intracellular S. aureus as detected by confocal laser scan immunofluorescence microscopy in epithelial cells of surgical intranasal biopsy specimens. Nine of the patients with and two without intracellular bacteria yielded S. aureus in endoscopically guided cultures of middle meatus secretions, despite the recent administration of prophylactic antibiotics. Eleven of the 17 patients with intracellular S. aureus relapsed for rhinosinusitis within the 12-month follow-up period. Molecular typing of sequential S. aureus isolates demonstrated the persistence of unique patient-specific S. aureus clonotypes in nine of the patients with intracellular bacteria during the 12-month follow-up. CONCLUSION: The presence of intracellular S. aureus in epithelial cells of the nasal mucosa is a significant risk factor for recurrent episodes of rhinosinusitis due to persistent bacterial clonotypes, which appear refractory to antimicrobial and surgical therapy.     

Nasal lavage with sodium hypochlorite solution in Staphylococcus aureus persistent rhinosinusitis

OBJECTIVE: To determine a selected concentration of sodium hypochlorite (NaOCl) in saline solution for nasal lavage and evaluate its clinical efficiency in the treatment of symptomatic patients with persistent, Staphylococcus aureus (SA) associated rhinosinusitis (RS). MATERIAL AND METHODS: In vitro tests for cilia and epithelial cell viability were done on reconstituted primary epithelial cells in vitro. Cells were exposed for 5 and 15 minutes twice daily for 5 consecutive days to one of the following conditions, (1) saline, (2) 0.5% NaOCl in saline, and (3) 0.05% NaOCl in saline. In order to evaluate tolerance, immunostaining was done for ezrin and F-actin network and observed with confocal microscopy. The patients (n=20) were all persistent SA symptomatic carriers, with unique patient-specific SA clonotypes, and multiple infection recurrence despite effective systemic antibiotic therapy. Each patient applied first saline alone for 3 months followed by saline + 0.05% NaOCl solution, as nasal lavage twice daily on both nostrils for 3 months. Symptom intensity and endoscopic findings were recorded with visual analogue scale (VAS). Nasal airway resistance (NAR) and nasal Nitric Oxide (NO) levels were measured before and after the saline lavage regimen, and after the saline + NaOCl treatment. RESULTS: F-actin network loss and decreased expression of ezrin were significant in cells exposed to 0.5%, but not in those exposed to 0.05% NaOCl. These changes were more obvious when exposed for 15 min. than 5 min. daily. The nasal lavage with 0.05% NaOCl in saline was well tolerated and a significant improvement in nasal obstruction (p = 0.001), posterior nasal discharge (p = 0.018), olfaction (p = 0.007) and headache (p = 0.009) was demonstrated. Significant improvement was also recorded in nasal endoscopic grading of oedema (p = 0.001), erythema (p = 0.001), purulent discharge (p = 0.002), nasal crusts (p = 0.001), and NAR (p = 0.05) as measured by rhinomanometry. There was no significant improvement in nasal NO production or subjective anterior nasal discharge. Bacteriological cultures of middle meatus secretions collected one month after the end of the treatment revealed the persistence of SA. CONCLUSION: Nasal lavage with 0.05% NaOCl solution in saline is suitable for long-term use and seems to be a good alternative to lavage with saline alone in the management of symptomatic RS associated with recurrent SA infections due to patient-specific SA clonotypes.     

金黄色葡萄球菌超抗原与慢性鼻窦炎鼻息肉发生相关性的研究

目的:探讨金黄色葡萄球菌(金葡菌)超抗原在鼻息肉发生中的作用。方法:对42例双侧鼻息肉患者(鼻息肉组)、27例单纯慢性鼻窦炎患者(鼻窦炎组)和12例无鼻窦疾病史的鼻外伤患者(对照组)的鼻腔分泌物进行细菌培养;采用酶联免疫吸附试验(ELISA)法检测各组患者的鼻黏膜或息肉组织中的金葡菌超抗原;在组织学上,对苏木精-伊红染色切片进行嗜酸粒细胞计数。结果:鼻腔分泌物中金葡菌阳性率鼻息肉组为7.1%,鼻窦炎组为3.7%,对照组为0,各组间差异均无统计学意义(均P>0.05)。ELISA结果显示:鼻息肉组金葡菌超抗原阳性率为54.76%,鼻窦炎组和对照组阳性率均为0。嗜酸粒细胞计数平均值:鼻息肉组23.94±13.88,鼻窦炎组0.29±0.51,对照组0.08±0.28,3组间均差异有统计学意义(均P<0.05)。鼻息肉组中ELISA结果阳性者嗜酸粒细胞水平比阴性者高,但差异无统计学意义(P>0.05)。结论:金葡菌超抗原与鼻息肉的发生存在相关性,有可能在鼻息肉的致病机制中起重要作用。     

Incidence of methicillin-resistant Staphylococcus aureus causing chronic rhinosinusitis

OBJECTIVE/HYPOTHESIS: To identify the incidence of methicillin-resistant Staphylococcus aureus (MRSA) causing chronic rhinosinusitis (CRS) and identify whether antibiotic use and previous endoscopic sinus surgeries (ESS) contribute to its development. STUDY DESIGN: A retrospective case control analysis, with the control group randomly selected and matched for age and sex. METHODS: All patients undergoing an endonasal culture in a tertiary otolaryngology center between April 2001 and March 2003 for mucopurulent rhinosinusitis were identified. A chart review was undertaken to identify those patients with a positive MRSA culture result. An age- and sex-matched control group was randomly chosen, and an interview was conducted to identify antibiotic use and previous ESS. A statistical analysis on these two variables was carried out using a t test and the Wilcoxon rank-sum test. RESULTS: Two hundred eighty cultures were identified in 188 patients, and of these, 264 cultures in 173 patients met the inclusion criteria. There were 141 positive cultures and 13 positive MRSA cultures. The overall incidence of MRSA in this population was 9.22%. The mean number of antibiotic courses in the MRSA and the control groups was 33.2 and 26.7, respectively, which was not statistically significant (P =.43). The 95% confidence interval (CI) for this mean difference of 6.5 is -9.8 to 22.8. The mean number of ESS in the MRSA and control groups was 2.0 and 1.9, respectively, which was not statistically significant (P =.93). The 95% CI for this mean difference of 0.06 is -1.3 to 1.4. CONCLUSIONS: We identified a 9.22% incidence of MRSA-causing CRS. The frequency of antibiotic use and previous ESS were found not to be statistically significant causes of MRSA sinusitis. However, the 95% CI for antibiotic usage is skewed to the right, indicating a possible role for its contribution to the emergence of MRSA-causing CRS.     

应用鼻腔冲洗器冲洗鼻腔对慢性鼻-鼻窦炎患者鼻腔黏液纤毛功能的影响

目的观察应用鼻腔冲洗器冲洗鼻腔对慢性鼻-鼻窦炎患者鼻腔黏膜纤毛功能的影响。方法60例单纯性慢性鼻-鼻窦炎患者,随机分为治疗组和对照组。治疗组用3%高渗盐水经鼻腔冲洗器冲洗鼻腔,对照组用3%高渗盐水经灌肠袋冲洗鼻腔,均为每日两次,连续冲洗14天,并辅以短期药物辅助治疗。分别于治疗前、治疗2周及疗后3月以糖精试验法检测鼻腔黏液纤毛清除率,比较两组鼻腔黏膜纤毛功能恢复情况和症状与体征的变化。结果治疗前2组的鼻腔黏液纤毛清除率差异无统计学意义;治疗2周后治疗组清除率为6.15±2.16mm/min,对照组为4.99±1.35mm/min,P＜0.05,前者的症状改善程度也较为明显;疗后3月治疗组清除率为6.81±1.45mm/min,对照组为6.69±2.41mm/min,P＞0.05。结论用鼻腔冲洗器冲洗鼻腔可有效促进鼻腔黏膜纤毛功能的早期恢复,对慢性鼻-鼻窦炎有辅助治疗作用。