Abstract:A survey was conducted to study clinical signs, gross and histopathological lesions in pigeons with naturally occurring Newcastle disease (ND). For this purpose, 45 pigeon farms of the Rajshahi, Natore and Pabna districts were conducted during from July 2015 to June 2016. Among these, 17(37.78%) farms showed clinical signs of Newcastle disease, including mainly greenish white mucoid diarrhoea and nervous signs with high morbidity and mortality. Morbidity was 90% and mortality was 100%. Diarrhoea, the most common clinical sign observed, was present in 48.28% of the affected pigeons, followed by nervous signs (27.59%), shivering (24.14%). Postmortem examination of affected birds showed lesions mainly in proventriculus, liver, lungs and kidneys. Histopathological changes were also observed in lungs, liver, and proventriculus. The results showed that the Newcastle disease virus was widespread in pigeons locally and caused high mortality rate. It is concluded that pigeon fanciers of northern Bangladesh do not maintain the regular preventive measures or vaccination against ND is being adopted to control the disease.
Meat characteristics of Cobb-500 and Ross boiler strains in terms of histomorphometry of myocyte, fat tissue and connective tissue were studied. Two representative muscles from breast (Pectoralis thoracis and Supracoracoideus) and two from thigh (Ilitibialis lateralis and Iliotibialis cranialis) were selected. Thicker myofiber in breast and thinner myofiber in thigh were found in Ross strain. The perimysial thickness significantly differed among the muscles. The perimysial thickness of breast and thigh muscle at 28 th day and thigh muscle at 35 th day of Cob-500 were found higher that indicate more toughness of representative muscles. Thick and broad bundles of collagen fiber were observed in perimysium of Ilitibialis lateralis and thinner but broad bundles were in perimysium of Pectoralis thoracis muscle. At 35 th day of age the endomysial thickness was found same in both strains but at 28 th day of age it was higher in Cobb-500 than that of Ross strain. The intramuscular fat deposited mainly within perimysium as cluster and the number (per focus) and the size of adipocyte diameter was differed among the muscles. Adipocytes diameter was recorded highest (24.14±1.33 µ) in pectoralis thoracis muscle of Ross boiler and 22.01±1.74 µ second in position in Cobb-500. The lowest diameter 15.62±0.87 µ) was recorded in case of iliotibialis lataralis muscle of Ross boiler.
Pigeon farming, like chicken and duck farming, is getting popularity nowadays in Bangladesh. The present study was conducted on the postnatal development and morphometry of egg of different breeds of pigeon available at northern Barind tract of Bangladesh. The study was conducted at thirty selected pigeon farms of three districts (Rajshahi, Natore and Pabna) of northern Barind tract of Bangladesh. The postnatal development (weight gain of squabs) of five groups (D0, D7, D14, D21, D28; D=day), and morphometry of eggs (egg weight, egg width (short axis), and length (long axis)) of breeds of pigeon (n=20, each breed) available at northern Barind tract in Bangladesh were collected and analyses with Duncan's Multiple Range test (DMRT). Considerable differences in the postnatal weight gain and egg morphometry were found among breeds of pigeon. The mature body weight of Giribaz, Kormona, Nun and Owl breeds of pigeon were below 300 gm; Satinette, Mookee, Suachandan, Lakkha, Jacobin, Bokhara, Shirajee, Homer and Pouter were 300-500 gm, and King and Strasser were below 800 gm. The postnatal weight of an age group was significantly different (p<0.05) from other age groups of all studied breeds. The highest egg length was 4.37±0.02 cm in Strasser, and the lowest was 3.68±0.01 cm in Giribaz pigeon. The highest egg width was 3.24±0.19 cm in Mookee, and the lowest was 2.73±0.02 cm in Giribug pigeon. The highest egg weight was 21.20±0.49 gm in Strasser, and the lowest was 14.00±0.23 gm in Owl pigeon. Moreover, a relationship between the body weight and egg length, width and weight of pigeons was observed in pigeons of all studied breeds. Asian J. Med. Biol. Res. September 2020, 6(3): 594-598
Abstract:The purpose of this study was to comparative histomorphological investigation of the non affected and affected liver by fascioliasis in Black Bengal goat. The average weight of affected livers was 511.2014.10 gm which was significantly (p<0.001) higher than non affected livers (371.7013.25 gm). The average length and girth of affected liver were 27.50 0.63 cm and 34.000.71 cm, respectively which were also significantly (p<0.001) higher than the length (21.800.61 cm) and girth (26.600.80 cm) of non affected liver of Black Bengal goat. The gross changes in acute form, affected livers were enlarged than normal. The livers were slightly swollen with rounded edges and the color became paler than normal. The capsule was more or less thick, opaque and rough than normal smooth thin capsule. The gross changes of the liver in chronic fascioliasis characterized by increase in the size of the organ due to inflammatory changes in the parenchyma and fibrosis of the bile ducts containing adult flukes. In acute cases microscopic changes were found mainly in the portal area. The grossly visible spots or tracks was represented by the presence of numerous eosinophils admixed with few lymphocytes and monocytes in the parenchyma of liver and accompanied by hemorrhage and edema. In chronic fascioliasis the hemorrhagic tracks or tunnels were represented by the areas infiltrated with fibroblasts admixed with neutrophils, lymphocytes and few mononuclear cells in the area previously migrated by young flukes. So it was concluded that liver of Black Bengal goats are mostly affected with fascioliasis which severely change the structure of that organ.
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