Current Issues of Pharmacy and Medical Sciences

Identification of Bacillus spp. colonizing the nasal mucosa of healthy adults living in the suburban area ...

Curr Issues Pharm Med Sci., Vol. 27, No. 3, Pages 137-141

Urszula Kosikowska*1,Dagmara Stepien-Pysniak2, Dorota Ozga3,
Andrzej Wernicki2, Anna Malm1

Department of Pharmaceutical Microbiology, Medical University in Lublin,  W. Chodzki  1, 20-093 Lublin, Poland

Sub-Department of Veterinary Prevention and Avian Diseases, Institute of Biological Bases of Animal Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głeboka 30, 20-612 Lublin, Poland
Department of Epizootiology and Clinic of Infectious Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Głeboka 30, 20-612 Lublin, Poland

DOI: 10.1515/cipms-2015-0001


Identification of Bacillus spp. colonizing the nasal mucosa of healthy adults living in the suburban area using the matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) system

Bacillus spp. can be regarded as a rare component of the nasal mucosa microflora.

The aim of this study was to identify Bacillus spp. from the nasal mucosa of healthy adults living in the suburban area near Lublin using the matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) system.

A total of 11 bacterial isolates from the nasal specimens were cultured. The following species were identified using the routine microbiological methods: Staphylococcus aureus (3 isolates), S. epidermidis (1 isolate), S. intermedius (1 isolate) and Staphylococcus spp. (1 isolate). Moreover, 2 strains of Escherichia coli were isolated. Besides, 3 isolates of Bacillus spp. were found. These isolates were characterized by means of MALDI-TOF MS, resulting in highly specific mass spectral fingerprints and these were identified as B. pumilus, B. safenis and B. licheniformis. It was observed that all studied Bacillus spp. isolates only had the masses in common at 3864 ± 2, 7727 ± 2, and 14301 ± 4. The spectra of B. safensis and B. pumilus showed peaks at m/z 4914 ± 3, 6621 ± 3 and 14291 ± 2, which were absent in the spectrum of B. licheniformis. For B. safenis and B. pumilus, other potential biomarkers could be found at m/z 12620 and 16668, respectively.



Bacillus spp., nasal mucosa, MALDI-TOF MS.


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