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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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  • ThesisItemOpen Access
    ECTOPARASITES OF POULTRY IN KAMRUP DISTRICT OF ASSAM: AN EXPLORATORY INVESTIGATION
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati-781022, 2017-07) Bora, Sanjana; Das, Manoranjan
    A study was conducted to record the prevalence of different ectoparasites of poultry in Kamrup (rural and metro) districts of Assam from March, 2016 to February, 2017. Out of 6514 birds; 1896 fowl(local), 4450(broilers), 108 ducks and 60 pigeons, lice infestation was 58.24% in intensive system and 64.09% in free range system, arachnids both tick and mite together was 48.61% in free range system. The lice, Menopon gallinae (52.32%); Lipeurus caponis(45.44%); Menacanthus stramineus (38.88%) and Goniodes gigas(3.68%) and no arachnids could be encountered in intensive system. The lice in free range system were Menopon gallinae (47.21%); Lipeurus caponis(46.59%)and Menacanthus stramineus (27.09%), mites were Dermanyssus gallinae(14.24%); Cnemidocoptes mutans (36.38%); Sarcoptes spp. (6.81%) and some other mites (8.20%) with significant differences amongst seasons and systems of rearing. A hard tick, Haemaphysalis spp. could be found for the first time in India with 3.10% prevalence rate. The ectoparasites of ducks recorded were lice Columbicola columbae (30.56%); Lipeurus caponis (28.70%) and some other mites (30.56%). The ectoparasites encountered in pigeons were Dermanyssus gallinae (20%); Columbicola columbae (50%) and dipteran fly Pseudolynchia canariensis (65%). Myiasis due to Chrysomyia bezziana in broiler chickens of 5-7 weeks old had a prevalence rate of 1.34% in pre-monsoon and monsoon and not in the winter season, this being the first report in North East India. Skin of fowl naturally infested with Dermanyssus gallinae revealed destruction of the superficial layer of epidermis, mild spongiosis in dermal layer characterized by vacuolation alongwith infiltration of eosinophils and heterophils histopathologically. Heavy infiltration of mononuclear cells in the dermis and areas with haemorrhages alongwith congestion were observed. Perakeratosis of stratum corneum in certain areas of the epidermis without affecting the deeper layers of the skin were noticed. Histopathologically, birds infested with Cnemidocoptes mutans, showed sloughing of the stratum corneum and cross sections of the mite in the affected areas of the epidermis, abnormal thickening of stratum granulosum indicating hyperkeratosis. Infiltration of eosinophil, heterophils and mononuclear cells and focal areas of necrosis were observed in the dermis. Skin sections of fowl infested with Cnemidocoptes mutans showed no reaction in epidermis with Succinic dehydrogenase (SDH),intense reaction in dermis with Succinic dehydrogenase (SDH),Alkaline phosphatase (AKPase) and Acid phosphatase (ACPase) and moderate reaction with AKPase and ACPase in the dermis. Chrysomyia bezziana completes its life cycle in 13 to 18 days in room temperature (28-32°C). The molecular characterization of Chrysomyia bezziana revealed 99% similarity with established database sequences of NCBI in BLAST analysis.