| seroprevalence of heartworm (dirofilaria immitis) in feline and canine hosts from central and northern portugal. | dirofilaria immitis is endemic in portugal. several studies have reported the presence of canine heartworm disease, although no previous studies on feline infections have been published. the aim of this study was to determine the prevalence of d. immitis in cats and dogs from central and northern portugal. blood samples from 434 cats were tested for circulating anti-d. immitis and anti-wolbachia antibodies. furthermore, 386 dogs were tested for circulating d. immitis antigens. overall feline ser ... | 2015 | 24824176 |