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Barring the Door to Foreign Diseases
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adult antibiotics antibodies aquarium areas avian bacteria bacterial bacterium become birth blood body breeding brucellosis cage calcium calves canine canine distemper cattle cause cells chickens clean clinical signs colostrum common condition cough cows dairy death demodicosis develop diagnosis diarrhea diet disease dogs and cats drugs ease eggs farm feces fected feed feline fever fish flock foal frequently goats hair herd hookworms horses host immunity infection ingestion intestine kennel cough Kevin Shields lambs larvae legs leptospirosis lesions lice loss lungs mals mastitis ment milk mites months muscle normal nutritional occur organisms parasites pasture percent pet birds pigs pneumonia poisoning poultry prevent problems produce protein pseudorabies rabbits require respiratory result Roundworms severe sheep skin species spread strongyles swine tapeworms ticks tion tissue tive treat treatment tumors ture types usually vaccine veterinarian viral virus viruses vitamin weeks of age worms yes yes yes/yes