Fatal Syngamus Trachea infection in chickens in Jos, North Central Nigeria: A case report

Postmortem examination of chickens from a semi-intensive system was carried out following complaint of high mortality, loss of weight, sneezing and raising of heads and gaping. The farm had other types of birds which were also evaluated to ascertain their risk of transmission of Syngamus trachea. Lesions seen included anaemia, hyperemia of the trachea containing forked red warms (S. trachea), congested and haemorrhagic lungs and presence of Raillietina tetragona in the small intestine. Histologically, there was necrotizing trachiesis, pulmonary congestion and  haemorrhages. To the best of the authors’ knowledge, this is the first case report of S. trachea in Jos, North Central Nigeria. Keywords: Syngamus trachea, Chicken, Case report, Pathology, Jos, Nigeri

Histogenesis of the Oesophagus of Guinea Fowl (Numida meleagris) at Prehatch and Posthatch

The histogenesis of the primordial oesophagus was studied to determine the period in which the tunics of the oesophagus developed and became functional in the helmeted guinea fowl (Numida meleagris). Eighteen embryos and nine keets were studied at prehatch and posthatch, respectively. Simple columnar epithelium surrounded by mesenchymal cells was obvious at the 8th day of embryonic development. By the 19th day of embryonic development, the four tunics, tunica mucosa, submucosa, tunica muscularis, and tunica adventitia/serosa, were beginning to differentiate from the mesenchymal cells and also the primordial oesophageal glands appeared as clusters of cells that invaginate from the epithelium. By the 27th day, the tunics were clearly differentiated and the primordial glands were fully developed as evident with positive reaction to Periodic Acid Schiff (PAS). The tunics of the muscularis were not well developed till at posthatch. This study therefore concludes that the primordial oesophagus is active at the late incubation due to mucin secretion by mucous glands but fully functional at posthatch since the tunica muscularis is completely developed at posthatch