Histomorphological and histochemical studies on lymphoid tissue of pyloric region in khaki campbell breed of duck (Anas platyrhynchos)

Abstract

The histomorphological and histochemical studies were carried out on the lymphoid tissue of pyloric region in 30 Khaki Campbell breed of duck of either sex in different age groups as group I (0-2 weeks), group II (2-4 weeks), group III (4-6 weeks), group IV (6-12 weeks) and group V (12-18 weeks). In the pyloric tonsil, there was heavy infiltration of tissue in lamina propria, extending into the crypts of Lieberkuhn. This lymphatic tissue was again found extended in the submucosa and tunica muscularis. In group II the nodules with the germinal centres were found enveloped with connective tissue capsule. The pyloric tonsils showed moderate to strong PAS positive reaction in group II, III and IV as compared with group I and group V.