Browsing by Author "Milovanović, Jovica (6603250148)"

Purpose: Microbial biofilms have been implicated in the pathogenesis of chronic rhinosinusitis with nasal polyposis (CRSwNP). The aim of our study was to evaluate in vitro effects of amoxicillin–clavulanic acid and levofloxacin on biofilm formation by bacterial species isolated from sinus tissue in patients with CRSwNP. Methods: The sinus mucosal specimens were harvested from the upper parts and roof of ethmoid cavity of 48 patients with CRSwNP. Each sample was washed thoroughly in three separate beakers of sterile saline to remove any planktonic bacteria and further subjected to microbiology analysis. The biofilm-forming capacity of isolated strains was detected by microtiter-plate method and the effects of subinhibitory (1/2× to 1/16× MIC) and suprainhibitory concentrations (4, 8, 16, 32, and 64 µg/ml) of amoxicillin–clavulanic acid and levofloxacin on biofilm production were investigated. Results: Bacterial strains were isolated in 42 (87.5%) patients: one microorganism in 80.9% and two microorganisms in 19.1% of patients. The most prevalent bacteria in CRSwNP biofilms were Staphylococcus epidermidis (34%) and S. aureus (28%) followed by S. haemolyticus (12%), Pseudomonas aeruginosa (8%), Moraxella catarrhalis (6%), Streptococcus pneumoniae (6%), and other staphylococci (6%). Subinhibitory concentrations of amoxicillin–clavulanic acid and levofloxacin significantly reduced biofilm formation (p < 0.01 and p < 0.05, respectively), with better efficacy of amoxicillin–clavulanic acid (1/2–1/8× MIC) on staphylococci and levofloxacin (1/2– 1/4× MIC) on M. catarrhalis and P. aeruginosa biofilm formation. Suprainhibitory concentrations of both tested antibiotics (4–64 µg/ml) significantly eradicated mature biofilms of staphylococci (p < 0.01). The effect of levofloxacin on eradication of staphylococcal biofilms was more noticeable, compared to the effect of amoxicillin–clavulanic acid (p < 0.01). Suprainhibitory concentrations of both tested antibiotics had no effect on eradication of previously formed M. catarrhalis and P. aeruginosa biofilms (p > 0.05). Conclusions: The amoxicillin–clavulanic acid and levofloxacin are shown to be potent antibiofilm agents in patients with CRSwNP. The effects of tested compounds depend on bacterial species and the volume of formed biofilm. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

Background/Aim. Numerous histopathological parameters, such as cartilage penetration, perineural and lymphovascular invasion, presence of metastatic tissue in regional lymph nodes (LNs), extranodal extension (ENE) of nodal metastases, as well as the presence of cancer tissue on resection borders, are all important factors influencing survival in patients with laryngeal squamous cell carcinoma (LSCC). The aim of the study was to determine if there is an association between cancer surface area (CSA) and these histopathological characteristics. The presence of ENE of metastatic tissue in regional LNs was also investigated. Methods. In a retrospective study, one hundred and forty cases of LSCC were revised and processed after total laryngectomy. The cases were found in the archives of the Histopathology Laboratory of the Clinic for Otorhinolaryngology and Maxillofacial Surgery, University Clinical Center of Serbia. Results. A significant difference was found in CSA depending on cancer penetration into the thyroid cartilage, perineural invasion, and positive resection margins. Cancers with larger CSA were more common in the advanced T stage. Metastases were found in 36 out of 72 (50%) neck LN samples submitted for evaluation. The difference in CSA was also found depending on the presence of metastatic tissue in regional LNs. ENE was present in 69.4% of involved LNs, and it was more frequent in LNs 3 cm in size or larger. Conclusion. There is a significant difference in CSA depending on the presence of cartilage penetration, perineural invasion, presence of cancer tissue on resection borders, and presence of metastases in regional LNs. Larger cancers tend to be of a higher T stage. ENE is more common in LNs 3 cm in size or larger. © 2022 Inst. Sci. inf., Univ. Defence in Belgrade. All rights reserved.

Introduction Acantholytic squamous cell (adenosquamous) carcinoma of the skin are relatively rare subtype of squamous cell carcinoma, usually found in elderly on sun-exposed areas of the skin, predominately head, neck and upper extremities. Incidence of metastasis is 2-14%. Case Outline A case of a 76-year-old male, with the signs of left-sided facial palsy and cervical mass on the same side, is presented. Five months prior to the visit, due to acantholytic squamous cell carcinoma, an excision of the ulceration of the superior third of the left auricle was performed. Patient underwent surgical treatment, after pathohistological and radiological confirmation of the infiltrative neck metastasis. Postoperatively, rapid locoregional progression of the disease was noted in the patient, with a lethal outcome. Conclusion Squamous cell carcinoma (including acantholytic subtype) with lesions bigger than 4 cm in size in auricular-temporal region, signs of deep tissue invasion, and lymphovascular and perineural invasion have higher local metastatic potential. More frequent oncological check-ups with radiological examination are necessary in detecting locoregional metastasis. © 2015 Serbia Medical Society. All rightsreserved.

[No abstract available]

Bacterial biofilm formation has been implicated in the high incidence of persistent otorrhoea after tympanostomy tube insertion. The aim of the study was to investigate whether biofilm formation on tympanostomy tubes depends on the genetic profile of methicillin-resistant Staphylococcus aureus (MRSA) strains. Capacity of biofilm formation on fluoroplastic tympanostomy tubes (TTs) was tested on 30 MRSA strains. Identification and methicillin resistance were confirmed by PCR for nuc and mecA genes. Strains were genotypically characterised (SCCmec, agr and spa typing). Biofilm formation was tested in microtiter plate and on TTs. Tested MRSA strains were classified into SCCmec type I (36.7 %), III (23.3 %), IV (26.7 %) and V (13.3 %), agr type I (50 %), II (36.7 %) and III (13.3 %), and 5 clonal complexes (CCs). All tested MRSA strains showed ability to form biofilm on microtiter plate. Capacity of biofilm formation on TTs was as following: 13.3 % of strains belonged to the category of no biofilm producers, 50 % to the category of weak biofilm producers and 36.7 % to moderate biofilm producers. There was a statistically significant difference between CC, SCCmec and agr types and the category of biofilm production on TTs tubes (p < 0.001): CC5, SCCmecI type and agrII type with a moderate amount of biofilm, and CC8 and agrI type with a low amount of biofilm. Biofilm formation by MRSA on TTs is highly dependent on genetic characteristics of the strains. Therefore, MRSA genotyping may aid the determination of the possibility of biofilm-related post-tympanostomy tube otorrhea. © 2015, Springer-Verlag Berlin Heidelberg.

Objective: The objective of this study was to analyse the aetiology, clinical presentations, histopathology and microbiological aspects of fungal rhinosinusitis (FRS) in patients undergoing endoscopic surgery. Methods: The descriptive study was carried out over a 4-year period in two Serbian ENT Clinics and included patients with sinonasal pathology who underwent endoscopic surgery. Results: The study included 26 patients. The most common forms of FRS treated by endoscopic sinus surgery was allergic FRS (AFRS). The fungus identification rate varied between entities, and was 72.2% in AFRS and 33.3% in fungal ball specimens. The common species seen in AFRS isolates were Cladosporium spp. (38.5% of isolated) and dematiaceous molds in the same percentage, while the remainder of the cultures were hyaline moulds. CT scan can be very helpful in diagnosing FRS and sometimes even in differentiating between different entities. Treatment of FRS should be tailored for each entity. Postoperative medical treatment in AFRS should consider potential advancements described in the literature. Conclusions: This study emphasises the need to combine all types of clinical, radiology, pathohistological and microbiological methods to obtain the best diagnostic and treatment strategies and should be the basis for further research. Copyright © 2025 Società Italiana di Otorinolaringoiatria e Chirurgia Cervico-Facciale, Rome, Italy.

Introduction Female workers in textile and metal industry are exposed to various physical and chemical hazards that can lead to the occurrence of gynaecological diseases. Objective The aim of this study was to estimate the frequency of gynaecological diseases among workers of textile and metal industries. Method The investigation comprised 197 female workers, 148 from textile and 49 from metal industry, aged from 26 to 57 years. All subjects were hospitalized based on non-gynaecological diagnoses. Gynaecological diagnoses included: tumours of the genital organs and breasts, cervical ectopy and lacerations, inflammatory diseases, disturbances of static of genital organs, cysts, and irregularities of menstrual cycle. RESULTS Textile workers were significantly younger than metal workers, but the groups were comparable according to total and exposure work-time, qualifications and diagnosis on hospital admission. Gynaecological diseases were diagnosed among all investigated subjects. About 80% were diagnosed with tumours and inflammatory diseases. A highly statistically significant difference was observed among groups according to the presence of cervical ectopy and lacerations, which were more frequent among textile workers. Conclusion Comparison of gynaecological status of workers revealed that, among textile workers, cervical ectopy and lacerations were more frequent than among workers in metal industry.

To evaluate the diagnostic accuracy of pretreatment surgical magnetic resonance images (MRI) in the assessment of patients with laryngeal tumors. The prospective study included 34 patients (mean age 62.2 ± 5.1 years) with suspected tumors of the larynx who underwent laryngeal endoscopy, followed by MRI. The MRI images were evaluated for the invasion of anterior commissure, subglottis, paraglottic and preepiglotic space, cartilage invasion, extension to extralaryngeal tissue and lymph nodes, and were compared to pathological examination of surgical specimen. In 15 patients (44%) the tumor was glottic, in 10 patients (29%) supraglottic, in 9 (27%) patients tumor was transglottic. No statistical difference was seen in the number of patients with positive MRI findings in comparison to postsurgical pathohistology for extension to subglottic subside (29 vs. 38%), growth to the anterior commissure (48 vs. 48%), preepiglottic space (33 vs. 29%), and cartilage infiltration (19 vs. 14%), respectively. However, infiltration of the paraglottic spaces was observed more frequently on MRI (71 vs. 47%), p < 0.05. According to MR findings, 4 (12%) patients were classified as T2, 26 (76%) patients as T3 and 4 (12%) patients as T4, while on pathohystological specimens after surgery, 12 patients were classified as T2 (35%), 18 as T3 (53%), and 4 as T4 (12%). Based on MRI, 76% of the patients were correctly classified, which was shown to be statistically significant (ρ = 0.56, <0.05). Fifteen patients had metastases in regional lymph nodes and only two were detected on MRI. MRI has been shown to be a method that contributes to presurgical assessment of patients with tumor of the larynx. © 2011 Springer-Verlag.

To assess the epidermal growth factor receptor (EGFR) correlation with histopathologic and clinical characteristics of laryngeal squamous cell carcinoma (SCC) and the impact of EGFR overexpression on patient survival. This retrospective study included 185 SCC patients treated at Clinical Department of ENT, Head and Neck Surgery, Split University Hospital Center between January 1, 2000 and December 31, 2009. A statistically significant correlation (p < 0.001) was recorded between the level of EGFR expression and SCC histopathologic grade, stage, metastasizing potential, relapsing potential, and patient survival. Kaplan–Meier survival curve yielded a statistically significant difference (χ2 = 75.05; p < 0.001) among the four patient groups with different levels of EGFR expression. The higher the level of EGFR expression, the poorer is the patient prognosis and survival. In our study, expression of EGFR as a biomarker showed a potential predictive value in laryngeal SCC. © 2014, Springer-Verlag Berlin Heidelberg.

Background/Aims: The aim is to compare the radionuclide (DC) and ultrasonographic (US) method in the assessment of gallbladder (GB) motility. Methodology: The study was performed in 15 controls (C), 10 patients with acute cholecystitis (AC), 20 patients with chronic acalculous cholecystitis (CAC), 26 patients with chronic cholecystitis with calculosis (CCC) as well as in 15 patients with GB dyskinesia (D). GB emptying period (EP), ejection fraction (EF) and ejection rate (ER) were estimated with dynamic cholescintigraphy (DC) and US. Results: The DC and US finding in the patients with AC was typical in all the patients, i.e. GB was not visualized at all on DC, while on US, stone was visible in the cystic duct. There were significant differences (p<0.05) between the EF and ER values obtained between C and the three groups of patients CAC, CCC and D, using both methods. However, there were no significant differences in EF, EP and ER values among CAC, CCC and D (p>0.05). There was also high correlation between the results obtained with both methods in all the groups of patients studied. Conclusions: The results obtained by both methods are valuable for the assessment of GB motility. Although there are no significant differences and there is a high correlation between the values, radionuclide method is more precise, because it can register motility continuously. © H.G.E. Update Medical Publishing S.A.

Laryngeal granulomas present as contact and postintubation ulcers and granulomas. Essentially, a contact granuloma is a pseudotumor of the lateral wall of the posterior glottis. The most common etiological factor is voice abuse, with predisponing factors such as reflux disease. Postintubation ulcers and granulomas, although of different etiology, according to all the other traits belong to this clinical entity. The therapy of choice is conservative treatment. Surgical laser excision is indicated for resistant cases and those whose size is causing respiratory distress. Treatment of laryngeal granulomas with zinc supplementation is reported in the literature as one of the forms of conservative treatment, and we wanted to consider it in this review. Zinc is an essential mineral that plays a vital role in many biochemical reactions and is considered very important for wound healing. © by Sanja Krejović-Trivić 2015.

Laryngeal granulomas present as contact and postintubation ulcers and granulomas. Essentially, a contact granuloma is a pseudotumor of the lateral wall of the posterior glottis. The most common etiological factor is voice abuse, with predisponing factors such as reflux disease. Postintubation ulcers and granulomas, although of different etiology, according to all the other traits belong to this clinical entity. The therapy of choice is conservative treatment. Surgical laser excision is indicated for resistant cases and those whose size is causing respiratory distress. Treatment of laryngeal granulomas with zinc supplementation is reported in the literature as one of the forms of conservative treatment, and we wanted to consider it in this review. Zinc is an essential mineral that plays a vital role in many biochemical reactions and is considered very important for wound healing. © by Sanja Krejović-Trivić 2015.

Purpose: Laser transoral laryngeal microsurgery has become widely accepted treatment method because of its organ and function preservation and shorter period of hospitalization. The aim of this study was to examine the overall, disease-specific and disease-free survival in patients with early laryngeal carcinoma treated with laser depending on age, gender, common risk factors (tobacco and alcohol use), histopathological tumor grade, anterior commissure involvement, performed tracheotomy, positive surgical margins, T stage, type of endoscopic cordectomy, postoperative radiotherapy and laryngeal preservation. Methods: Retrospective study included 234 patients with squamocellular carcinoma of the larynx treated with laser transoral laryngeal microsurgery. 5-year overall, disease-specific and disease-free survival and the prognostic impact of mentioned factors were evaluated using Kaplan–Meier and Cox proportional hazard analyses. Results: 5-year OS and DSS was 92.5% and 95.3%, respectively. OS was significantly lower for older patients and in patients with histologically poorly differentiated tumors, 3 and 5 years postoperatively (Log rank test; p = 0.031). DSS was significantly lower in patients with anterior commissure involvement, positive surgical margins and patients who underwent postoperative RT. DFS was significantly lower in patients with anterior commissure involvement, patients with T1b tumor stage and patients who underwent cordectomies type Vb and VI (Log rank, p < 0.05). Laryngeal preservation significantly influenced 5-year OS, DSS and DFS (Log rank, p ≤ 0.001). Multivariate Cox regression analysis showed that age, histological tumor grade and laryngeal preservation were significant negative prognostic factors for 5-year DSS and DFS. Conclusion: Transoral laryngeal microsurgery delivers excellent oncological results, even in selected patients with higher stages of early laryngeal cancer and anterior commissure involvement. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Background: The major clinical dilemma managing acute rhinosinusitis (ARS) in pediatric population is distinguishing uncomplicated rhinosinusitis from a complicated bacterial ARS and orbital complications, the latter requiring antimicrobials and surgical intervention. However, factors associated with severe orbital complications and the optimum management strategy remains controversial. The objectives of this study were to characterize the clinical outcomes of children with orbital complications of ARS and to identify risk factors associated with disease severity. Methods: This retrospective cohort analysis evaluated the clinical outcomes of 61 children admitted for orbital complications between January 1, 2002 and December 31, 2017. Descriptive statistics were performed to examine the demographics and clinical findings. We compared groups using Mann-Whitney U test for continuous variables and χ2 for categorical variables. Results: Although two-thirds of children had received prehospital antibiotics, half of the cohort presented with post-septal orbital complications. While 83% of isolates obtained from the same patients were susceptible to the prehospital antibiotics given, the majority of those who received prehospital antibiotics nevertheless required surgical intervention. We observed significant association between the age of presentation and disease severity. Children >5 years of age presented with more severe orbital complications despite prehospital antibiotics and were more likely to require surgical intervention (P < 0.001). Conclusions: In this study, stage II/III orbital complications at presentation and older age were the most important determinants of medical treatment failure. Early referral to eye, nose and throat (ENT) should be considered for children >5 years with ARS due to worse orbital complications despite prehospital antibiotics. © 2019 Pediatric Infectious Disease Journal. All rights reserved.

AIM: To assess the clinical role of monoclonal immunoscintigraphy for the detection of metastasis and recurrence of colorectal cancer. METHODS: Monoclonal immunoscintigraphy was performed in patients operated on for colorectal adenocarcinoma suspected of local recurrence and metastatic disease. The results were compared with conventional diagnostics. RESULTS: Immunoscintigraphic investigation was done in 53 patients. Tumor recurrence occurred in 38 patients, and was confirmed by other diagnostic modalities in 35. In 15 patients, immunoscintigraphic findings were negative, and confirmed in 14 with other diagnostic methods. Comparative analysis confirmed good correlation of immunoscintigraphic findings and the results of conventional diagnostics and the level of tumor marker carcinoembryonic antigen. Statistical analysis of parameters of radiopharmaceutical groups imacis, indimacis and oncoscint presented homogenous characteristics all of three radiopharmaceuticals. The analysis of immunoscintigraphic target focus was clearly improved using tomography. CONCLUSION: Immunoscintigraphy is highly specific and has a good predictive value in local recurrence of colorectal cancer. © 2011 Baishideng. All rights reserved.

Introduction/Objective New World Health Organization Classification of Head and Neck Tumors from 2017 has introduced significant changes, mainly considering tumors in the oropharyngeal region. New entities of HPV-positive and-negative squamous cell carcinomas have been acknowledged, not only based on the presence of an active viral infection and different tumor markers expression, but also because of their different histopathology, staging assessment, and prognosis. A retrospective study has been conducted, in order to determine p16 positivity in squamous cell carcinomas in oropharynx and in the oral cavity, and to see whether they differ in sex and age distribution. Methods The presence of viral infection was verified based on p16 immunochemistry staining, p16 being the surrogate marker for HPV infection. A total of 177 cases of squamous cell carcinomas in the oropharynx and the oral cavity, found in the archives of the Histopathology Laboratory of the Clinic for Otorhinolaryngology and Maxillofacial Surgery, Clinical Centre of Serbia, have been revised. Results Out of 177 cases, 50 (28.2%) were p16-positive. Compared with carcinomas in the oral cavity, p16 carcinomas were significantly more common in the oropharynx (34.3% in the oropharynx, compared to 10.3% in the oral cavity). Carcinomas in both regions were mostly associated with male sex (88.1% of all cases were in males), but p16 positivity was more common in females (11 out of 21 cases, 52.4%). The most common location of p16-positive carcinomas were palatine tonsils (41.03% of tonsillar carcinomas were p16-positive). Conclusion P16-positive squamous cell carcinomas were the most numerous in the oropharynx, i.e. palatine tonsils, and were more common in females. © 2020, Serbia Medical Society. All rights reserved.

The aim of this study was to examine how ibuprofen and paracetamol prevent pain after cold-steel extracapsular tonsillectomy in children. Also, we examined the relation between age, gender, nausea, postoperative bleeding, antibiotic use, type of diet, and postoperative pain intensity and the type of administered analgesic. A prospective study was conducted on 147 children (95 males and 52 females, aged 7-17 years) who underwent tonsillectomy in the Clinical-Hospital Center “Dragiša Mišović” from January 1 to June 30, 2016. The degree of pain was measured using a visual analog scale (VAS). We did not observe any significant differences in postoperative nausea, hospitalization rate postoperative bleeding, and antibiotic use between the paracetamol and ibuprofen groups. A test of within-patient effects showed that VAS scores changed significantly during the postoperative follow-up period (P =.00), but there were no significant differences between the groups (P =.778). After 12 hours, 29.3% of the patients on paracetamol and 21.8% on ibuprofen were transferred to a soft diet; after 24 hours, 84.8% of the paracetamol group and 85.5% of the ibuprofen group were on a soft diet (χ2 test, P <.05). There was a statistically significant correlation between VAS scores measured 4 hours after the surgery and the time of transference to the soft diet (Spearman ρ test, P <.001). The transfer to soft and normal diets was not significantly different between the 2 groups as assessed by the VAS scores (Pearson χ2 test, P =.565).There is still no consensus on the most effective postoperative pain-control regiment after tonsillectomy. This study showed that satisfactory pain management was achieved equally with both paracetamol and ibuprofen. © The Author(s) 2019.

Introduction/Objective Oropharyngeal carcinoma makes up to 3% of all newly diagnosed carcinomas in the world. In Serbia, oropharyngeal carcinoma constitutes 1.8% of all malignancies. Studies have shown a growing role of infections with human papilloma viruses (HPV) in oropharyngeal cancer etiology. HPVpositive patients have a more favorable prognosis and significantly higher rate of overall survival. The purpose of this paper was to establish how HPV status influenced Serbian patients’ overall survival and the disease-free survival according to known risk factors (tobacco and alcohol consummation), clinical TNM stage of the disease, and modality of treatment. Methods The study included 87 patients treated for oropharyngeal carcinoma in a one-year period with a five-year follow-up. Treatment modalities included surgery with or without postoperative radio- or chemoradiotherapy, only radiotherapy or chemoradiotherapy. Sex, common risk factors, TNM stage, and treatment method were considered, as well as the influence of HPV status on the overall survival and the disease-specific survival depending on the presence of risk factors. Results HPV-positive patients with oropharyngeal carcinoma were more frequently men, smokers, and alcohol consumers. Considering clinical T, N, and M stage of the disease, the overall survival and the disease-specific survival rates were better in HPV-positive patients, who had better survival if they were treated with primary surgical therapy rather than primary radiotherapy. Conclusion HPV status significantly influenced survival and locoregional control in Serbian patients with oropharyngeal carcinoma. This implies possible modifications of treatment strategies for these patients in order to further improve their prognosis and treatment outcomes. © 2018, Serbia Medical Society. All rights reserved.

Introduction/Objective Total laryngectomy is a very mutilating operation and it leads to drastic changes in life quality. The purpose of this study was to examine factors of importance to the laryngectomized patients’ quality of life and to evaluate characteristics of esophageal voice and speech. Methods The study was conducted at the Clinic of Otorhinolaryngology and Maxillofacial Surgery, at the Clinical Center of Serbia (Belgrade, Serbia), during the period between March 2012–2015. The study included 223 patients diagnosed with laryngeal cancer, who underwent total laryngectomy. The total of 168 laryngectomized patients were provided with phoniatric rehabilitation. Results The quality of life was significantly better for those laryngectomized patients who did undergo phoniatric rehabilitation. By means of intensive phoniatric rehabilitation the esophageal voice and speech was established in 86.3% of laryngectomized patients registered by objective acoustic analysis. Rehabilitated laryngectomy patients had a significantly lower presence of voice handicap sense (VHI: 19.57 ± 7.35) and expressed significantly lower symptoms of depression and anxiety (PHQ-9: 3.8 ± 4.2; GAD-7: 3.4 ± 4.2). Cronbach’s alpha coefficient was above 0.7 EORTC QLQ-C30 on three levels of Likert scales: the scale of physical and emotional functioning and fatigue; as well as EORTC QLQ-H&N43 questionnaire: the symptoms of head and neck pain, speech, swallowing and eating problems and body image. Conclusion Significantly improving the quality of life of laryngectomized patients was achieved by a multidisciplinary rehabilitation. Phoniatric rehabilitation carried out in a planned and systematic way is the most efficient rehabilitation of laryngectomized patients. © 2018, Serbia Medical Society. All rights reserved.

Objectives: Biofilms are associated with persistent infections and resistant to conventional therapeutic strategies. The aim of this study was to investigate the quantity of biofilm produced on silicone intranasal splints. Methods: Quantity of biofilm formation on silicone splints (SS) was tested on 15 strains of Staphylococcus aureus and Moraxella catarrhalis, respectively. Antimicrobial susceptibility testing was performed in accordance with European Committee on Antimicrobial Susceptibility Testing recommendations. Results: All tested strains formed different amounts of biofilm on SS: 66.7% S. aureus and 93.3% M. catarrhalis were weak biofilm producers and 33.3% S. aureus and 6.7% M. catarrhalis were moderate biofilm producers. S. aureus formed significantly higher quantity of biofilm compared with M. catarrhalis (p < 0.05). Multidrug resistant S. aureus produced significantly higher amount of biofilm compared with non-multidrug resistant strains (p < 0.05). Conclusion: Quantity of biofilm on SS is highly dependent on bacterial species and their resistance patterns. Future studies are needed to ascertain another therapeutic option for prophylaxis prior to SS placement. © 2016 Akadémiai Kiado, Budapest.