Pathomorphological changes in the alimentary system of Japanese quails naturally infected with Eimeria tsunodai

Abstract

The aim of this study was to investigate pathomorphological changes in the duodenum, jejunum, ileum, and caecum of Japanese quails naturally infected with Eimeria tsunodai. Samples of the intestines were collected from 6-week-old cockerels and hens before laying and from laying quails aged 12, 24, and 48 weeks. The tissue sections were stained with haematoxylin and eosin, PAS method according to McManus, and Ziehl-Neelsen method. Morphometric and morphological analyses of coccidia revealed that Eimeria tsunodai was responsible for the infection. Different developmental stages of the coccidia were observed almost exclusively in the caecum, and they led to the complete damage of caecal mucosa. The main changes observed in the caecum involved mucosal damage, atrophy of the folds and crypts, and mucosal desquamation. No significant inflammation changes were detected. The degree of damage to caecal mucosa increased with age and the greatest damage was noted at the age of 48 weeks. Eimeria tsunodai infections occur in Japanese quails during the entire laying period. Different developmental stages of coccidia are responsible for total damage to caecal mucosa.

Prevalência de endoparasitas em codornas japonesas (coturnix coturnix japonica) em dois aviários comerciais na região amazônica

“…Atinge o epitélio intestinal dos vários grupos de aves, representado por lesões deixadas na área de fixação do parasita (Soave, 2011;Vita et al 2019). Há quatro espécies de Eimeria que podem ser identificadas em codornas (Teixeira et al, 2004;Mohammad, 2012), baseadas na especificidade do local de desenvolvimento, entre elas: E. tsunodai, com desenvolvimento quase exclusivo no ceco (Tsutsumi, 1972), E. uzura (Tsunoda & Muraki, 1971) e E. bateri (Bhatia, Pandey & Pande, 1965) que habitam preferencialmente o duodeno e jejuno, respectivamente (Teixeira et al 2004, Gesek et al 2014. A presença de oocistos do gênero Eimeria foi visualizada, como no estudo relatado, em C. japonica em Manaus, Brasil (Monte et al 2018).…”

Parasitic profiling of Japanese quails (Coturnix japonica) on two farms with conventional production system in the Amazon region

“…According to Teixeira et al (2004) and Mohammad (2012), four species of Eimeria can be found in quails; E. tsunodai Tsutsumi, 1972, E. uzura Tsunoda et Muraki, 1971, E. bateri Bhatia, Pandey et Pande, 1965and E. fluminensis Teixeira et Lopes, 2002. Based on the specificity of the development site of Eimeria in quails, cecal infection can be associated with E. tsunodai, since, according to Tsutsumi (1972), Gesek et al (2014) this species has almost exclusive development in the cecum, whereas E. bateri, and E. uzura preferably inhabit portions of the duodenum and jejunum respectively (Teixeira et al 2004, Gesek et al 2014.…”

Pathomorphological changes in individual tubular and parenchymal organs of quails according to eimeriosis

“…Клінічні ознаки еймеріозу перепелів, а саме пригнічення, втрата апетиту, спрага, діарея, реєструються на фоні патоморфологічних змін в тонкій і товстій кишках -лімфоїдно-еозинофільної інфільтрації, катарального запалення слизової оболонки дванадцятипалої кишки; катарально-геморагічного запалення і лімфоїдної інфільтрації слизової оболонки порожньої кишки; еозинофільної інфільтрації, геморагічного запалення слизової оболонки сліпої кишки, скупчення в просвіті останньої геморагічного детриту з спорозоїтами (Gesek, Welenc, Tylicka, Otrocka-Domagała, Paździor, & Rotkiewicz, 2014;Monte, Cavalcante, Oliveira, & Lima, 2015;Yatusevich, Fedotov, Soroka & Orda, 2016).…”