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Table 4 Cat risk group definitions

From: Survey of European pet owners quantifying endoparasitic infection risk and implications for deworming recommendations

Cat Risk Group Description EU ESCCAP recommended deworming frequency
A Cat lives indoors. Infection pressure with worm stages is low, eating rodents unlikely Treat 1–2 times per year against roundworms, or 1–2 times per year fecal exam and treatment according to findings
B Cat is free to roam outdoors. Infection pressure with worm stages is high, eating rodents likely Treat against roundworms and tapeworms at least 4 times a year
Ca Cat eats prey animals and/or goes outdoors to hunt and eats raw meat Treat against roundworms and tapeworms more than 4 times per year
Da Cat is free to roam outdoors and shares home with young children or immunocompromised individuals Deworm once a month, or examine faecal samples once a month and treat according to findings
  1. aESCCAP Cat Risk Groups include A and B only. Additional risk factors in the ESCCAP guidelines were used to create Groups C and D for consistency in reporting and comparison of dog and cat results