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Table 1 The number of Dirofilaria immitis naturally infected dogs submitted to a moxi-doxy therapy (10% imidacloprid + 2.5% moxidectin and doxycycline hyclate) that remained antigen-negative even after a heat pre-treatment of samples, according to the microfilariae (Mf) level

From: Heat pretreatment of canine samples to evaluate efficacy of imidacloprid + moxidectin and doxycycline in heartworm treatment

Mf level n Months of moxi-doxy
  6 12 18
Amicrofilaremic 2 1 1
< 300 Mf/ml 9 6a 3
> 300 Mf/ml 11 1b 8 2
Total 22 8 12 2
  1. Different letters (a and b) in column indicate significant differences: χ 2 = 4.90, P = 0.0166