Fig. 4 in Repeated inoculations with the lung and heartworm nematode Angiostrongylus vasorum result in increasing larval excretion and worm burden in the red fox (Vulpes vulpes)

Fig. 4. Arithmetic mean larval counts (first stage larvae per gram of feces) of foxes dogs experimentally inoculated at 0 wpi and challenged once (group B) or twice (group D) with 100 third stage larvae of Angiostrongylus vasorum from 6 to 22 wpi. Y-axis log10 transformed. Arrows indicate the challenge time points.