Microbial study of pre and postoperative mastoid cavities: a comparative study


  • Hari Krishna Kishore Department of ENT, Vishwabharathi Medical College, RT Nagar, Kurnool, Andhra Pradesh, India
  • C. Mallikarjuna Reddy Department of Microbiology, Mallareddy Institute of Medical Sciences, Suraram, Hyderabad




Bacterial Infection, Preoperative, Postoperative, Mastoid cavities, Otorrhoea


Background: This was a comparative microbial study of pre and postoperative mastoidectomy. The aim of the present study was to evaluate various causes responsible for discharging mastoid cavity.

Methods: Total of 160 patients of which 100 cases were of preoperative group and 60 cases were postoperative group included in the study.  

Results: Mono infection was seen in 95% and 86.7% in pre and postoperative cases respectively; where as 5% of preoperative and 13.3% of postoperative cases were diinfections. Pseudomonas (32%) was found in highest number followed by Staphylococcus aureus (16%), Klebsiella spp. (16%), Escherichia coli (15%), Proteus mirabilis (14%), Aspergillus fumigatus (2%), Candida (1%), and Cladosporium (1%) in preoperative cases. In postoperative cases, 46.7% of Pseudomonas spp, followed by 16.5% Staphylococcus, 16.7% Klebsiella spp, 11.7% Proteus mirabilis, 10% Escherichia coli, 8.3% Aspergillus fumigatus and 5% Candida were isolated.

Conclusions: Multiple factors were responsible for otorhhoea with significant contribution from the microbes.

Author Biography

Hari Krishna Kishore, Department of ENT, Vishwabharathi Medical College, RT Nagar, Kurnool, Andhra Pradesh, India

ENT,Assistant Professor


McGuekin F. Recent advances in tympanoplastic surgery. J laryngol and Otol. 1958;72:535-45.

Thorburn TB. A critical review of thypanoplastic surgery. J laryngol and Otol. 1960;74:453-74.

Portman M. Tympanoplasty technique and experiences with tympanoplasic surgery. Arch Otolaryngol. 1963;78:2-19.

Ekvall L. Total middle ear reconstruction. Acta Otolaryngol. 1973;75:279–81.

Gyo K, Hirata Y, Yanagihara N. Changes in bacterial flora in the tympanic cavity following tympanoplasty. Otorhino Clinic. 1993;86:1403–7.

Palva T, Hallstrom O. Bacteriology of chronic otitis media. Arch Otolaryng. 1965;82:359–64.

Chhapola S, Matta I. Mastoid Obliteration Versus Open Cavity: A Comparative Study. Indian J otolaryngol Head Neck Surg. 2014;66(1):207–13.

Mishra SC, Kushwaha JLM, Vrat S. Microbial studies of postoperative mastoid cavities. Inidal J Otolaryngol. 1990;42:63-5.

Brook I, Finegold SM. Bacreriology of Chronic otitis media. J Am Med Assoc. 1979;241:487-8.

Shim HJ, Park CH, Kim MG, Lee SK, Yeo SG. A pre- and postoperative bacteriological study of chronic suppurative otitis media. Infection. 2010;38:447-52.

An-ting X, Ming X, Han-Bing Z, Kimitaga K. Bacteriolgy before and after total middle ear reconstruction. J Otol. 2007;2(2):114-8.

Abdul-Lateef Mousa H. A prospective study of seven patients with chronic mastoiditis. JMM Case Rep. 2015;2:1-5.

Verhoeff M, van der Veen EL, Rovers MM, Sanders EA, Schilder AG. Chronic suppurative otitis media: a review. Int J Pediatr Otorhinolaryngol. 2006;70:1–12.

Madana J, Yolmo D, Kalaiarasi R, Gopalakrishnan S, Sujatha S. Microbiological profile with antibiotic sensitivity pattern of cholesteatomatous chronic suppurative otitis media among children. Int J Pediatr Otorhinolaryngol. 2011;75:1104–8.

Elango S, Than T. Mastoiditis in Kelantan. Med J Malaysia. 1995;50:233–6.

Apte BC. Towards a dry ear. J Otolayngol. 1960;12:91-7.






Original Research Articles