Table 3. Generalized linear model parameters of the indirect hemagglutination assay (IHA) positive rate of Meriones unguiculatus (M. unguiculatus) in the plague natural focus of M. unguiculatus on the Inner Mongolian Plateau.
| Factor | b | χ2 | p |
| Intercept | 0.140 | 64.717 | <0.000 |
| Density of M. unguiculatus(/ha) | –0.001 | 3.237 | 0.072 |
| Nocturnal rodent capture rate | 0.076 | 0.628 | 0.428 |
| Percentage of hosts infested with fleas (%) | –0.019 | 0.771 | 0.380 |
| The host-flea index | –0.011 | 5.394 | 0.020 |
| Percentage of nests infested with fleas (%) | –0.241 | 46.991 | <0.000 |
| The nest-flea index | 0.003 | 46.320 | <0.000 |
| Percentage of the passage of burrows infested with nomadic fleas (%) | –0.192 | 11.680 | 0.001 |
| The index of nomadic fleas at the passage of burrows | 0.055 | 4.576 | 0.032 |