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Table 3. Distribution of Organism by Specimen<br />
ORGANISM Ear Granurn Bone Choles- TOTAL<br />
aspirate tissue teatoma<br />
Proteusrnirabilis 13 13 9 10 45<br />
Proteusvulgaris 5 1 4 5 15<br />
Pseudomonasaeruginosa 5 13 1 4 13<br />
Staphylococcusaureus 2 2 2 1 7<br />
Escherichiacoil 1 0 1 1 3<br />
Klebsiellasp. 1 0 0 2 3<br />
Enterobacteragglomerans 1 0 1 1 3<br />
Providencia 1 1 0 0 2<br />
Bacteroidesmelaninogenicus 1 0 0 1 2<br />
Bacteroidesp. 1 1 0 0 2<br />
Klebsiellaozanae 0 1 0 0 1<br />
Acinetobacteranitratum 0 0 1 0 1<br />
Acinetobacterwolfii 0 0 0 1 1<br />
Enterococcu sp. 0 0 0 1 1<br />
No growth 2 I) 3 1 §<br />
No specimen 1 7 10 6 24<br />
DISCUSSION chloramphenicol (IV) prior to surgery. This was<br />
unavoidable as these patients had unsafe ears with<br />
In any infectious disease, a clear understanding potentials for intracranial complications.<br />
of the microbial population is necessary in order to<br />
choose the proper antibiotic. The microbial flora in The most common organisms grown in this<br />
chronically draining ears is constantly evolving such study were Proteus mirabilis (45/100), Proteus vulgaris<br />
that regular surveilance cannot be overemphasized. (15/100), Pseudomonas aeruginosa (131100) and<br />
Staphylococcus aureus (7/100). These results were<br />
This study was conducted among COM patients comparable to that found by other investigators (Table<br />
who underwent radical mastoidectomy at the ENT 4). However, it was noted that although the microbial<br />
Department. These patients had discharging ears for flora has remained unchanged in the last two decades,<br />
several years with an average of 5 years. Most of the Proteus species has become more prevalent with<br />
these patients however received penicillin and Pseudomonas becoming less frequent.<br />
TABLE 4.<br />
Types of Aerobic Microorganisms Isolated in COM.<br />
AUTHOR No.of "Pseudomonas Proteus Staphylococcus<br />
Ears aeuruglnosa sp. aureus<br />
Vizon,Torres(1969) 55 25.4% 18.2% 12.7%<br />
Jokipii,et al (1977) 70 4.0% 8.0% 19.0%<br />
Abes,Jarnir (1978) 30 48.8% 16,3% 11.6%<br />
Ojalaet al (1981) 806 19.0% 12.9% 22.0%<br />
Sugitaet al (1981) 62 7.8% 21.1% 6.3%<br />
Chionget al (1989) 120 3.8% 35.8% .....<br />
Presenistudy 30 13.0% 63.0°/, 7.0%<br />
60
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