Presence and recovery of Ascaridia dissimilis ova on the external shell surface of turkey eggs.
Ascaridia dissimilis, a roundworm in turkeys, has been noted with increased frequency in commercial turkeys. Because infected turkeys can shed A. dissimilis ova in their feces, the potential exists for the external surface of turkey eggshells to be contaminated with A. dissimilis ova. The objectives of this study were to determine the presence of and recover A. dissimilis ova on the external surface of the turkey egg. In Experiment 1, turkey eggs were collected from naturally infected flocks, and eggs were processed by a sodium hydroxide procedure to recover any A. dissimilis ova on the external egg surface. In Experiment 2, the external surface of the turkey eggs was inoculated with 116 A. dissimilis ova/g feces, and eggshells were sampled every 3 days until 28 days of incubation to assess the recovery of A. dissimilis ova from the eggshell. In Experiment 1, of the 36 eggs examined from a flock naturally infected with A. dissimilis, one egg had an A. dissimilis ovum on its external eggshell surface. Experiment 2 demonstrated that A. dissimilis ova can be recovered from the external egg surface after a 28-day incubation period in the incubator. Ova recovery declined from an average of 62 A. dissimilis ova/turkey egg at day 2 of incubation to an average of 3 A. dissimilis ova/turkey egg at day 28 of incubation.
Seaton
E M
EM
Department of Veterinary Preventive Medicine, The Ohio State University, Columbus 43210, USA.
Monahan
C M
CM
Morishita
T Y
TY
D000818:Animals; D001197:Ascaridia / Q000302:isolation & purification*; D001198:Ascaridiasis / Q000662:veterinary*; D004528:Egg Shell / Q000469:parasitology*; D005243:Feces / Q000469:parasitology; D011201:Poultry Diseases / Q000469:parasitology*; D014422:Turkeys / Q000469:parasitology*