Outer membrane proteins (OMPs) of Pasteurella multocida strain P52 were purified by immunoaffinity chromatography (IAC) using pre-challenge serum from HS vaccinated cattle-calves. IgG antibody titers of pre-challenge sera from HS vaccinated calves surviving and succumbing to direct challenge with virulent culture were determined against formalized P52 cells, P52 crude cell lysate, and OMPs of P52 purified by IAC. It was observed that OMP antigens were involved with protective response in calves and indirect ELISA test using lAC purified antigens can be developed for in vitro potency determination of Haemorrhagic septicemia (HS) vaccines.

The scarcity of green during summer months imposes nutritional stress on farm animals. In this study we examined the effect of nutritional stress on various biochemical parameters of rabbits.Control and green deprived groups each of 20, weaned New Zealand White rabbits, of either sex, were randomly placed and observed for two months. Then green was re-introduced in deprived group for again two months. Blood sera harvested at every 15th day and analyzed using RA 50 Chemistry auto analyzer. Significant (p0.05) decrease of alkaline phosphatase (AKP), lactate dehydrogenase (LDH) and increase in gamma glutamyl transpeptidase (GGT) and serum cholesterol was observed in rabbits green deprived group.

A study was conducted on the epididymis of 30 Gaddi goats, divided into three groups of 10 animals in each viz; Prepubertal (1 day old to 18 months of age), Pubertal (18 months to 5yrs of age)and Postpubertal (5yrs of age). The study revealed that all the structures of epididymis grew gradually and consistently with age; however the differential growth was more appreciable during prepubertal and pubertal stages of life than in the later phases. In one day old kids, the tubular epithelium comprised of simple columnar epithelium, which became pseudostratified columnar at six months of age. The tubular diameter and height of the epithelium and its stereocilia also increased from birth to late prepuberty. It increased further in the pubertal animals and only slightly in postpubertal animals. Histochemically the cytoplasm of epididymis was PAS positive and Sudanophilic. Moderate to strong ACPase and strong AKPase activities were observed in all the segments of epididymis, which increased with age.

The present study was conducted on six crossbred calves below one year of age. The lead acetate was given @ 25 mg/ kg body weight orally for 7 days. After the completion of the experimental period, the lung tissues were collected in liquid nitrogen and cryostat sections of 10 ìm thickness were incubated for the demonstration of phosphatases and dehyrogenases. The positive and negative controls were carried out wherever possible. The lungs showed moderate AKPase, ATPase and G-6-Pase activity whereas the SDH and LDH activity varied from weak to moderate in alveolar septae.ACPase activity was increased in histiocytes of alveolar septae. The alveolar ducts showed negligible activity of all the enzymes studied. The results may be correlated with cellular damage and lysis of macrophages of the alveoli.

Clinico-therapeutic studies were made on thirty clinical cases of lantana toxicity in cattle. The affected animals showed anorexia, constipation, icteric mucous membranes, lachrymation, oligurea,cracks on muzzle, dehydration and rumen stasis. Biochemical analysis revealed that 61.53 % of early presented cases and 100 % of late presented cases were having biphasic Vanden Bergh reaction. Hypoglycemia and increased total protein level were present in late presented cases. Markedly elevated values of total bilirubin, BUN, AST and alkaline phosphatase in both the early and late cases of lantana toxicity indicated hepatic and renal dysfunction.

A total of 281 serum samples collected randomly from goats showing the signs of fever, abortion,repeat breeding and still births as well as from apparently healthy ones were subjected to LAT and MAT based on rLipL32 and rLipL41 antigens. A total of 16 (5.69%) samples were found positive to MAT, whereas rLipL32-LAT and rLipL41-LAT detected 35 (12.45%) and 23 (8.18%) samples as positive, respectively. The sensitivity and specificity of rLipL32-LAT was 87.50% and 92.83%, respectively,while rLipL41-LAT yielded 75.00% and 97.35% sensitivity and specificity, respectively. LAT based on rLipL32 and rLipL41antigens could further be evaluated on a larger number of samples to ensure its utility as a screening test for the sero-epidemiological studies.

The ameliorative effect of salts, ascorbic acid olyphosphate and zinc oxide supplementation on heat stress was studied in adult buffaloes of either sex which were randomly divided into two groups of four animals each. Group I served as control and Group II was supplemented with sodium bicarbonate, potassium carbonate, ascorbic acid polyphosphate and zinc oxide. All the animals were exposed to two conditions of temperature and humidity: hot-dry and hot-humid in psychrometric chamber for 4 hours daily for 10 days. Blood was collected on days 1, 5 and 10 of treatment. The activities of enzymes catalase, superoxide dismutase (SOD) and concentrations of reduced glutathione (GSH), hormone cortisol and thiobarbituric acid (TBA) binding substances (lipid peroxidation) were estimated in serum. Significant decreasewas observed in activities of serum catalase and SOD. Serum GSH concentration decreased while serum concentrations of TBA binding substances and cortisol significantly increased in both groups which were subjected to heat stress. Dietary supplementation of ascorbate, zinc and electrolytes resulted in further decrease in the enzymes' activities where as the serum GSH increased at par to normal values. Serum concentrations ofTBA binding substances and cortisol were comparatively lower in supplemented group in both types of stress. Thus, supplementation of ascorbate and zinc in addition to electrolytes relieved the animals of oxidative stress.

An experiment was conducted on 100 day in old broiler chicks to study the immunosuppressive potential of Argemone mexicana seeds toxicity. Toxicity was induced by administrating crushed Argemone seeds @ 5, 10,20 and 30 grams per Kg of feed in treatment groups Tl, T2, T3 and T4 respectively whereas the Control group was maintained on the normal feed. The birds in the treatment groups showed the symptoms like dullness, depression and ruffled feathers. The body weight gain (BWG) was poor in comparison to control. The lymphoid organ to body weight ratio, HI titers and percentage of active macrophage were found significantly reduced. The histopathological lesions revealed marked lymphoid depletion indicaive of immunosuppressive potential ofArgemone seeds.

Different segments of oviduct (infundibulum, ampulla, isthmus and utero tubaljunction)of six buffaloes each during follicular and luteal phases of estrous cycle were studied. The samples were collected in 10% NBF processed for paraffin sectioning were stained with hematoxylin and eosin, Masson's trichrome, PetiodicAcid Schiff, alcian blue and PASalcian blue. The mucosa was found thrown into longitudinal folds having primary, secondary and tertiary branches. Branching was more pronounced in infundibulum and ampulla as well as during the follicular phase as compared to luteal phase. The different segments were lined with columnarto pseudostratifiedcolumnarepithelium.The cellswere ciliatedand non ciliated type. In follicular phase, the epithelium showed strong PASreaction which was con~entrated in the supranuclear zone while during the luteal phase the reaction was moderate. The reaction was granular in nature. The epithelium was also strongly positive for alcian blue and PASalcian blue during follicularphase. Thepropria submucosa, tunica muscularis and tunica serosa showed weak to mild reaction for PASand alcian blue.

Pertaining to the scenario at hand milk samples from Holstein x Hariana crossbred cows were investigated for alternation in enzyme activity as influenced by sub clinical mastitis (SCM) and their percent sensitivity,specificity,accuracy,positive and negative predictive values, positive and negative likelihood ratios and correlation with (somatic cell count) SCC were calculated. It was found that SCM influence significantly the activity of ALP at pO.OIand LDH at pO.O5in milk. Aspartate amino transferase activity was not influenced by SCM in milk. Moreover, both were found to be correlated with somaticcellcount, significantly.Fromthe likelihoodratios itwas clearthat both alkalinephosphatase (ALP) and LDH can be used for diagnosis of SCM, but, ALP is the safe indicator of SCM in the present study.