Skip to main content

Table 1 Detection of antigens of Dirofilaria immitis a in canine blood samples from different areas of Brazil

From: Updated canine infection rates for Dirofilaria immitis in areas of Brazil previously identified as having a high incidence of heartworm-infected dogs

Region/locales Antigens ofD. immitis
Positive/total %
South   
Florianópolis, SC 3/146 2.1
Araquari, SC 11/150 7.3
Guaratuba, PR 12/49 24.5
Guaraqueçaba, PR 7/22 31.8
Pontal do Paraná, PR 31/118 26.3
Combined 64/485 13.2
Southeast   
Guarujá, SP 4/142 2.8
Bertioga, SP 7/92 7.6
Mangaratiba, RJ 23/141 16.3
Niterói, RJ 92/157 58.6
Cabo Frio, RJ 11/40 27.5
Armação de Búzios, RJ 23/37 62.2
Combined 160/609 26.3
Northeast   
Lauro de Freitas, BA 30/148 20.3
Salvador, BA 24/120 20.0
Recife, PE 22/60 36.7
Itamaracá, PE 54/109 49.5
Combined 130/437 29.7
Overall Total 354/1531 23.1
  1. aTested with Witness® HW (heartworm) antigen test kit, Zoetis, USA.