Table 3 Spearman correlation matrix depicting the strength of association between filaria and Wolbachia species within infected dogs

Wolbachia DNA

0.506 (< 0.0001)

0.284 (0.0002)

0.565 (< 0.0001)

0.447 (< 0.0001)

− 0.053 (0.490)

Both Wolbachia of D. immitis and D. repens DNA

0.313 (< 0.0001)

0.175 (0.023)

0.087 (0. 259)

0.454 (< 0.0001)

− 0.059 (0.449)

Single-species DNA of Wolbachia ex D. immitis

0.478 (< 0.0001)

0.244 (< 0.002)

0.509 (< 0.0001)

0.079 (0.381)

− 0.072 (0.335)

Single-species DNA of Wolbachia ex D. repens

0.334 (< 0.0001)

− 0.024 (0.614)

− 0.037 (0.630)

0.181 (0.019)

0.104 (0.180)