EVALUATION OF NASAL CARRIAGE OF STAPHYLOCOCCUS AUREUS IN STUDENTS OF A DENTISTRY FACULTY

Author(s):  
Cengiz ÖZÇELIK ◽  
Handan AYHAN ◽  
Berksan ŞIMŞEK
MedPharmRes ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 21-31
Author(s):  
Nguyen Phan ◽  
Hien Pham ◽  
Thuc Nguyen ◽  
Hoai Nguyen

Staphylococcus aureus (S. aureus) has long been recognized as an important human pathogen causing many severe diseases. It is also a part of human normal flora with its ecological niche in the human anterior nares. This study focused on screening S. aureus nasal carriage in community and its relationship to human physiological and pathological factors which have not been studied in Vietnam previously. Two hundred and five volunteers in Ho Chi Minh City from 18 to 35 and over 59 years old both male and female participated in the study. Result showed that the prevalence of S. aureus nasal carriage in southern Vietnamese community was relatively low, only 11.2% (23/205), much lower than that in other international reports on human S. aureus. In addition, nasal carriage of the older age group (> 59 years old, 13.7%) was higher than that of younger age (18-35 years old, 10.4%). Other potential risk factors such as gender, career, height, weight, history of antibiotic usage, daily nasal wash, use of nasal medication sprays, acne problems, smoking and nasal problems showed no significant impact on S. aureus carriage. The obtained S. aureus nasal isolates were all sensitive to vancomycin. Lincomycin and tetracycline had low resistance rate with 4.3 % and 17.4 %, respectively. However, the isolates showed particularly high rate of multidrug resistance (54.2%) In summary, our data provided researchers an overview on S. aureus nasal carriage and antibiotic susceptibility profile of the community- isolated S. aureus in Vietnam. This would serve as valuable information on assessing risk of community-acquired S. aureus infections.


2014 ◽  
Vol 5 (4) ◽  
pp. 205-209
Author(s):  
MAŁGORZATA M. KOZIOŁ ◽  
AGNIESZKA SIKORA ◽  
SYLWIA TARGOŃSKA ◽  
ANNA SIKORA

2017 ◽  
Vol 2 (1) ◽  
pp. 29 ◽  
Author(s):  
Zaini Mohd Zain ◽  
Muhammad Fikri Johari ◽  
Nurul Shahirah Mohd Husin ◽  
Nurul Syamimi Rozman ◽  
Athirah Ab Rashid ◽  
...  

Introduction: To determine the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) nasal carriage and detection of S. aureus leukotoxins among medical students of Universiti Teknologi MARA. Methods: Both sides of the anterior nares of 136 volunteers, comprising 68 preclinical and 68 clinical medical students, were swabbed and immediately cultured onto mannitol salt agar for growth of S. aureus. Standard microbiological techniques were conducted to identify and confirm the S. aureus colonies and susceptibility test against oxacillin were conducted by using Kirby-Bauer method to determine their resistance to methicillin. Polymerase chain reaction was performed for detection of leukotoxins, i.e., Panton-Valentine Leukocidin (PVL) and -haemolysin genes. Results: Nineteen students (14%) consisting of 10 preclinical (14.7%) and 9 clinical (13.2%) were nasal carriers of S. aureus. However, none of the S. aureus isolates were MRSA. No PVL gene was detected but eight of them were positive for -haemolysin gene. Conclusion: There were no MRSA nasal carriers among the medical students, but a low prevalence of S. aureus nasal carriers was detected. These carriers do not pose as high risk because none of the strains of S. aureus possess both the -haemolysin toxin and the PVL toxin that are associated with tissue necrosis.


Dermatology ◽  
2021 ◽  
pp. 1-6
Author(s):  
Dimitra Stergianou ◽  
Vassiliki Tzanetakou ◽  
Maria Argyropoulou ◽  
Theodora Kanni ◽  
Pantelis G. Bagos ◽  
...  

<b><i>Background:</i></b> Several patients with hidradenitis suppurativa (HS) present flare-ups during treatment with adalimumab (ADA), the cause of which is not clear. ADA is the only FDA-approved biologic for the therapy of moderate-to-severe HS. A previous study of our group has shown that <i>Staphylococcus aureus</i> stimulation of whole blood affects the production of human β-defensin 2 and modulates HS severity. It is, therefore, hypothesized, that carriage of <i>S. aureus</i> may drive HS flare-ups. <b><i>Objective:</i></b> To explore the association between carriage of <i>S. aureus</i> and loss of response to ADA. <b><i>Patients and Methods:</i></b> Among patients with moderate-to-severe HS without carriage of <i>S. aureus</i> at start of treatment with ADA, we investigated for carriage of <i>S. aureus</i> from the nares when flare-ups occurred. Flare-ups were pre-defined as at least 25% increase of inflammatory lesions (sum of inflammatory nodules and abscesses) from baseline. Samplings were also done after completion of 12 weeks of ADA treatment from all patients who did not present flare-ups. Clinical response to ADA was assessed by the HS Clinical Response score (HiSCR). <b><i>Results:</i></b> Thirty-nine patients were studied; 24 with Hurley II stage HS and 15 with Hurley III stage HS. Twenty-nine patients achieved HiSCR after 12 weeks of treatment without any flare-ups; 10 patients had flare-ups and failed HiSCR. Three (10.3%) and 5 (50%) patients, respectively, had nasal carriage of <i>S. aureus</i> (odds ratio 8.67; 95% CI 1.54–48.49; <i>p</i> = 0.014). Among 32 patients reaching follow-up week 48, 20 patients achieved HiSCR and 12 had flare-ups leading to ADA failure; 2 (10%) and 5 (41.7%) patients, respectively, had positive culture for <i>S. aureus</i> (odds ratio 6.42; 95% CI 1.00–41.20; <i>p</i> = 0.05). <b><i>Conclusion:</i></b> Nasal carriage of <i>S. aureus</i> may be associated with loss of response to ADA. Findings need confirmation in larger series of patients.


2005 ◽  
Vol 41 (7) ◽  
pp. 1071-1072 ◽  
Author(s):  
P. G. P. Charles ◽  
B. P. Howden ◽  
P. B. Ward ◽  
E. J. Bishop ◽  
P. D. R. Johnson ◽  
...  

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