Abstract
The purpose of the research is the study of morpho-biological characteristics and food chains of the preimaginal stages of Wohlfahrtia magnifica, pathogens of obligate tissue myiasis in sheep.Materials and methods. The studies were performed on sheep farms of various forms of ownership in the steppe zone of the Stavropol Territory. We determined the prevalence and intensity rates of W. magnifica infection and causes of wolfarthiosis spreading. The number and behavioral responses of W. magnifica imagoes were studied in grazing and stationary management of sheep. We took into account the life expectancy and ecological plasticity rates of W. magnifica adults and larvae. The fecundity of females was determined by manual preparation under an MBS-I microscope. The myiasis development process and preimaginal development of parasitic W. magnifica larvae were studied in spontaneous and artificial infection of sheep. Clinical studies of animals were performed according to generally accepted methods.Results and discussion. The results of the studies made it possible to establish that the preimaginal development of W. magnifica Schiner, 1862 in the host is characterized by the cooperation of parasitic larvae during the myiasis development and by a complex of morphological and physiological adaptations associated with changes in the external and internal structure of parasites and in the functioning of the systems of their organs. The pathogenic effect of the parasite on the host (primary, or specific) is due to its morphophysiological characteristics. The phenomenon of extraintestinal digestion in the W. magnifica larvae was described. Nutrition is the basis of symbiosis and parasitism, and knowledge of the mechanisms by which parasites absorb and partially utilize nutrients is fundamental to understanding parasitism and parasite-host relationships.
Highlights
Traumatic myiasis in farmed animals caused by Wohlfahrtia magnifica in southern Italy
Traumatic myiasis of dogs caused by Wohlfahrtia magnifica (Diptera: Sarcophagidae)
Марченко Вячеслав Вячеславович – развитие методологии, критический анализ материалов и формирование выводов
Summary
Морфологические адаптации и трофические связи преимагинальных стадий Wohlfahrtia magnifica Schiner, 1862 (Diptera, Sarcophagidae). Цель исследований: изучение морфо-биологических особенностей, трофических связей преимагинальных стадий Wohlfahrtia мagnifica – возбудителей облигатных тканевых миазов у овец. Исследования проводили в степной зоне Ставропольского края в овцеводческих хозяйствах разных форм собственности. Мagnifica изучали при пастбищном и стационарном содержании овец. Учитывали продолжительность жизни и показатели экологической пластичности имаго и личинок вольфартовой мухи. При спонтанном и искусственном заражении овец изучали процесс формирования миаза и преимагинального развития паразитирующих личинок W. Результаты проведенных исследований позволили установить, что преимагинальное развитие W. magnifica Schiner, 1862 в организме хозяина характеризуется кооперацией паразитирующих личинок в процессе развития миаза, комплексом морфологических и физиологических адаптаций, которые связаны с изменением внешнего и внутреннего строения паразитов и функционирования систем их органов. Ключевые слова: Wohlfahrtia magnifica, паразитирующие личинки, трофические связи, морфологические адаптации. Прозрачность финансовой деятельности: никто из авторов не имеет финансовой заинтересованности в представленных материалах или методах
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