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Pathology of Reproductive Organs with Special Reference to Oviduct in Layers

KrishiKosh

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Title Pathology of Reproductive Organs with Special Reference to Oviduct in Layers
 
Creator Srinivasan, P.
 
Contributor Balasubramaniam, G.A.
 
Description Oviduct abnormalities among laying chicken maintained in 85 farms in and
around Namakkal district were investigated. The major oviduct abnormalities were
due to Newcastle disease (ND) in 19 farms (22.35 per cent), salpingitis in 17 farms
(20 per cent) hydrosalpinx in 17 farms (20 per cent) and egg peritonitis in 6 farms
(7.06 per cent). Other minor conditions like chronic respiratory disease,
aflatoxicosis, impaction of oviduct, egg bound, atrophy of oviduct, cystic dilatation
of right oviduct, double oviduct, parovarian cyst and internal layers were found in
the remaining 26 farms (30.59 per cent). Though all the age groups of the birds
were found to be susceptible to the oviduct abnormalities, the highest and lowest
incidences were noticed in the age group of 31 to 40 wk (20.70 per cent) and 21 to
30 wk (12.95 per cent) respectively. Among the various disorders of oviduct, ND
and Infectious bronchitis (IB) were proved to be the important agents that caused
the drop in egg production and also more morbidity and mortality.
Grossly, ND affected oviducts showed pale, dry and thinned mucosal folds.
IB affected birds revealed marked atrophy of ovary and oviduct. Salpingitis cases
showed exudate accumulation causing massive dilatation of magnum. Egg
peritonitis cases revealed caseous plaques or strands attached to peritoneum and
other organs. Congested to ruptured follicles and distension of oviducts were seen
in E.coli affected cases. Oviducts of Salmonellosis affected birds revealed cheesy
plugs and in Mycoplasma cases, cystic developments in infundibulum was noticed.
Histopathologically, atrophied oviducts revealed atrophy of glands,
fibroplasia and lymphoid cell infiltration in all parts of the oviduct. In double oviduct
cases, the right oviduct revealed all the layer of left oviduct but the degree of
development of epithelium was minimal. Impacted oviduct showed severe
inflammatory cell infiltration and focal epithelial necrosis. Exudate mixed with
bacterial clumps was observed in egg bound oviducts. In hydrosalpinx cases,
marked flattening of infundibulum mucosal folds, focal necrosis and cystic
dilatation of tubular glands of magnum and severe necrosis of surface epithelium
of uterus were observed.
In Newcastle disease affected birds, loss of cilia and focal hyperplasia of
epithelial cells of infundibulum, necrosis of surface epithelium, marked distension
of tubular glands and epithelial granular depletion of magnum and focal atrophic
changes of uterus were observed.
In Infectious bronchitis affected cases, reduction in the size of mucus folds
of infundibulum, absence of tubular glands in isthmus and marked inflammatory
changes of vagina were noticed.
Necrosis of surface epithelium in infundibulum and atrophy of secretary
glands in magnum and isthmus regions of oviduct were noticed in Colibacillosis.
Salmonella affected oviduct revealed necrosis of surface epithelium and
mononuclear cell infiltrations. Inflammatory cells infiltration in between tubular
glands and atrophy of tubular glands were observed in the oviducts of
Mycoplasma affected birds.
Degranulation and depletion of secretary glands of glandular epithelium were
confirmed by ultrastructural studies in hydrosalpinx. Presence of Newcastle
disease virus, Infectious bronchitis virus and Mycoplasma agents were
reconfirmed by immunoperoxidase and immunofluorescent techniques.
 
Date 2016-07-26T12:40:11Z
2016-07-26T12:40:11Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69906
 
Language en
 
Format application/pdf
 
Publisher Tamil Nadu Veterinary and Animal Sciences University