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Table 4 Adult D. immitis recovered at necropsy

From: Efficacy of four commercially available heartworm preventive products against the JYD-34 laboratory strain of Dirofilaria immitis

Treatment group Animal ID Male D. immitis Female D. immitis Total D. immitis
Ivermectin/Pyrantel IDF-2 2 3 5
(Group 1) UHH-2 12 3 16 a
  VTH-2 10 5 15
  IOF-2 12 2 14
  BFG-2 5 7 13 a
  PXC-2 6 8 15 a
  VVH-2 12 7 19
  GSC-2 5 8 13
Total     110
Milbemycin/Spinosad FCG-2 6 1 7
(Group 2) IUE-2 2 0 3 a
  UDH-2 9 4 14 a
  VCG-2 3 1 4
  TPH-2 6 8 15 a
  XBH-2 7 4 12 a
  EZG-2 4 3 8 a
  KUH-2 11 7 18
Total     81
Selamectin OFF-2 7 9 17 a
(Group 3) VUH-2 4 4 9 a
  EYE-2 6 2 9 a
  UKG-2 4 8 13 a
  AVG-2 9 5 15 a
  GPG-2 12 4 16
  ZXG-2 13 5 18
  GDE-2 7 3 11 a
Total     108
Imidacloprid/Moxidectin DIH-2 0 0 0
(Group 4) UYH-2 0 0 0
  CGH-2 0 0 0
  FKC-2 0 0 0
  FJC-2 0 0 0
  VZG-2 0 0 0
  LAG-2 0 0 0
  THH-2 0 0 0
Total     0
Non-treated Control UTH-2 5 11 17 a
(Group 5) GKC-2 7 7 15 a
  TWH-2 9 9 18
  EDG-2 9 8 18 a
  RAF-2 6 15 21
  CRC-2 11 7 18
  TJH-2 4 9 13
  IXG-2 19 13 32
Total     152
  1. aIntact heartworms were enumerated by gender. If worm pieces/ fragments were also recovered, one additional worm was added to the count for that dog