This study was done to assess the changing pattern of microorganisms isolated from various sites ofpatients. Bacteriological examination was carried out in 11 patients continuously during a period afterthe surgical operation.
The results were as follows:
1) It was a total of 761 strains from 493 clinical materials. Gram negative rods were 12.7% of thestrains from nose, 13.5% from pharynx and 17.2% from sputum.
Staphylococcus aureus was 18.2% of thestrains from nose, 4.6% from pharynx and 7.6% from sputum. From operation wounds and drainages
Staph. aureus was 28.2% and 35.3%, respectively, and Gram negative rods were 17.9% and 35.3%, respectively.
2) Concidering the change of bacterial flora at the nose and pharynx of the patients from the statusof preoperation to that of postoperation, the samples containing normal flora were only decreased andthose having the strains of
Staph. aureus or those of Gram negative rods were increased at the first day ofpostoperation.
3)
Staph. aureus and Pseudomonas aeruginosa were isolated from the samples taken from the nose ofthe patients being inserted a naso-gastric tube. Therefore, it was expected that the change of the nasalflora was affected by inserting a nasogastric tube.
4) There were 4 patients from whom
P. aeruginosa iaolated from two different sites and more aswell as from their feces. The strains isolated after the surgical operation, which were isolated fromdifferent sites of these patients, showed same sero-type and same antibiotic susceptibility pattern.
5) There were 6 patients from whom
Staph. aureus was isolated from two different sites or more.The strain was isolated from the nose of all of 6 patients. The strains from 2 of 4 patients, isolated fromtheir fingers, showed same coagulase-type and same antibotic susceptibility pattern as those isolatedfrom nose, pharynx, sputum, and feces.
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