Table 4. Gram positive and negative composition from Qiang minority and Han.
| Groups | n | G +ve | G -ve |
| Qiang | 73 | 58(79.5) | 15(20.5) |
| Han | 110 | 103(93.6) | 7(6.4) |
Strains(%)
Χ2=-08347,P=0.004
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