[Table/Fig-5a]:

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Culture	Group A	Group B
Klebsiella	9 (18%)	5 (10%)
Staphylococcus aureus	3 (6%)	4 (8%)
Pseudomonas	2 (4%)	1 (2%)
Proteus	2 (4%)	0
E-coli	1 (2%)	0
No growth	15 (30%)	20 (40%)
Not done	18 (36%)	20 (40%)