title: [Superinfection in heterakiasis].
abstract: Experiments including single, two-fold and triple superinvasions with 100 invasive heterakidic eggs each on 2 day- and 4 month-old chickens were carried out (beginning of the experiment). Single superinvasions were effected on the 12th, 18th and 30th day, two-fold superinvasions -- on the 12th and 18th, 12th and 30th, 18th and 30th day, while triple superinvasions took place on the 12th, 18th and 30th day. It was established that the superinvasions of 20 day-old chickens reduce 3.6 times the survival of heterakids. The reduction was most pronounced in chickens superinvaded on the 18th day. A certain areactivity was observed in 4 month-old superinvaded chickens: the number of surviving heterakids was 1.4 times greater in superinvaded chickens than in the control. A significant shortening of heterakid length was established in younger experimental chickens as compared to the control, as well as an enhanced pathogenic effect of the helminths. Deviations of this kind were not evident in older chickens.
mesh_terms: D000818:Animals; D002645:Chickens / Q000469:parasitology*; D005260:Female; D008297:Male; D009348:Nematoda / Q000502:physiology; D009349:Nematode Infections / Q000662:veterinary*; D011201:Poultry Diseases / Q000469:parasitology / Q000473:pathology*; D013997:Time Factors
vernacular_title: Vurkhu superinvaziiata pri kheterakidozata.