The study investigated an outbreak of respiratory mannheimiosis in goat maintained at the Goat Research station, AAU, Burnihat during September-October, 2019. Out of the total 215 nos. of animals at risk, 48 nos. were affected and 16 died with a morbidity and cause specific mortality of 22.32% and 33.3% respectively. The clinical signs exhibited by the affected animals were offfed, high rise of temperature (104°-105°F), thick mucoid nasal discharge and coughing. During necropsy, pneumonia was diagnosed among all the cases and the most frequently affected lobe was right cranial lobe. In most of the cases lung showed fibrinous bronchopneumonia. Consolidated areas of the lungs were swollen and dark red in color. In some cases presence of whitish fine foamy fluid or creamy suppuration could also noticed. Sometimes, the fibrin was adhered in the ribs with or without hydrothorax. The tracheal rings were hemorrhagic and the lumen was filled with the mucus and froth. Microscopically, three different types of pneumonia viz. Fibrinous, suppurative and fibrinopurulant could be seen. Alveolar lumen was filled with fibrinous exudate, erythrocytes, and polymorphonuclear cells. During isolation, the results observed were typical to those exhibited by Mannhemia spp.
The experiment was conducted in the Department of Veterinary Pathology, C.V.Sc, A.A.U., Khanapara, Guuwahati, Assam, India during September, 2020−August, 2021. Avian Mycoplasmosis is a severe threat to the poultry industry. Mycoplasma gallisepticum (MG) and Mycoplasma synoviae (MS) represent the most important Avian Mycoplasma spp. worldwide in the poultry industry. All age groups of chickens and turkeys are susceptible to infection. Most of the outbreaks were recorded between 3rd and 6th weeks of age. The disease is characterized by respiratory rales, coughing, nasal discharge, conjunctivitis, sinusitis and air sac lesions. In the present study, a total of 400 sera were tested for detection of antibodies from 29 farms from 11 different locations of Kamrup (M) and Kamrup (R) district, Assam. For detection of Mycoplasma antibodies, indirect ELISA was performed by using commercially available kits for MG and MS (IDEXX Laboratories). Out of the total samples tested, 13.25% showed sero-positivity for MG and 7.25% showed sero-positivity for MS. Among different age groups, highest sero-positivity was recorded in age group of above 5 weeks (8.5%) and lowest sero-positivity was recorded in birds of age 3−4 weeks (0.75%) for MG. For MS, the highest sero-positivity was recorded in birds of age group of above 5 weeks (5.25%) and lowest sero-positivity was recorded from age 3−4 weeks (0.5%). Season-wise highest sero-positivity was recorded in winter (6.5%), followed by post-monsoon (4.25%), monsoon (1.75%) and pre-monsoon (0.75%) for MG. In case of MS, highest sero-positivity was recorded in post-monsoon (3%), followed by winter (2.75%), monsoon (1%) and pre-monsoon (0.5%).
The present study was carried out to investigate the pathology of Aspergillosis in ducks. A total of 10 cases were recorded during the months of June & July, 2019. The diagnosis was made on the basis of clinical signs, gross & microscopic alterations and isolation of the fungus. The clinical signs observed in the affected ducks include respiratory distress, dyspnoea, gasping and accelerated breathing associated with loss of appetite, stunted growth, lethargy and increased thirst. Grossly, there were presence of whiteyellowish caseous nodules in the lung, airsacs, gizzard, liver, thoracic wall and abdominal serosa. Histopathological examination revealed the presence of focal granulomatous lesions in the lungs characterized by central necrotic area with infiltration of heterophils, macrophages, epithelioid cells and formation of giant cells. Similar type of lesions were also recorded in liver and gizzard. Invasion of fungal hyphae at the peri-bronchiolar and interstitial tissue and haemorrhages were also noticed. On the 5th day post incubation, there were presence of blackish green colonies in the SDA plates.
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