Being infected by worms is no laughing matter as there are potential serious health risks that may occur in infected children and adults. However, regular deworming of pets markedly reduces the risk to pet owners.
Adult pets should be dewormed at least twice a year, but this frequency depends on the particular circumstances of the dog and its lifestyle. Large numbers of dogs housed in close association, for example in kennels, will need deworming maybe four times a year. Repeat deworming after two or three weeks will improve the efficacy of the deworming process. Take note that combination deworming drugs (available from veterinarians) achieve the best results.