The present study aimed to assess some biochemical changes of oxidative stress in alloxaninduced diabetic rats with administration of lipoic acid. The experiment was carried out on 96 male rats. The group I (32 rats) was left as control (normal non-diabetic). Sixty-four rats were injected subcutaneously with alloxan (120 mg / kg.b.wt.) for induction of diabetes. Then it was divided into two equal groups, group II (diabetic without administration of lipoic acid) and group III (diabetic with administration of lipoic acid). Blood samples were collected from 8 rats of each group for separation of clear serum at 1st, 2nd, 3rd and the 4th week after administration for determination of glucose. Fresh liver and brain tissue samples (0.2 g) were collected from sacrificed rats and homogenized in ten volumes of (ice-cold phosphate saline pH: 7), then kept at –20 ?C for assay of malondialdehyde, reduced glutathione and liver glycogen. The obtained data revealed that serum glucose level was significantly decreased in the 3rd group as compared with the diabetic one. Also there was a significant decrease of liver glycogen in the diabetic group as compared with the non-diabetic control group. Moreover, significant decrease of reduced glutathione in both liver and brain tissues in diabetic group as compared with control. Lipoic acid caused a significant elevation in liver reduced glutathione as compared with the diabetic group, but without effect on brain. There was a significant rise in malondialdehyde in liver and brain tissues of diabetic group as compared with control. On the other hand there was a significant decrease of malondialdehyde in liver and brain tissues of diabetic rats with lipoic acid as compared with diabetic rats throughout the experiment period. It could be concluded that significant increase of malondialdehyde together with the decrease of reduced glutathione in the diabetic group: indicated the oxidative stress of induced diabetes. Also the study revealed that lipoic acid exerted a powerful antioxidant effect and therefore the diabetics should be supplemented regularly with this vitamin.

This study was carried out on 168 sheep in a private farm at Qena province. 128 out of them were apparently healthy, 22 clinically diseased suffering from respiratory affections and 18 were died at three weeks intervals. Bacteriological examination of the samples revealed that 42 samples were positive for bacterial isolation; 6 from apparently healthy animals, 20 from clinically diseased animals and 16 from dead ones. Bacterial isolates could be identified biochemically as P. multocida and P. heamolytica. Pathogenicity tests for P. multocida isolates indicated that the isolates were pathogenic to laboratory animals. P. multocida was isolated in high percentage (15%) in comparing with P. haemolytica (10%).

The urinary bladder of 15 clinically normal dogs was excised and the ureters were implanted into an isolated, vagotomized gastric segment derived from the fundic region of the stomach. The gastric segment was closed to form a neobladder. Continence was maintained with a "nipple valve" created at the tubularized end of isolated segment of stomach. Clinical, radiological, ultrasonographical, urine and blood analysis and histopathological examination were carried out for assessment of the technique. Eleven cases showed an apparently normal bladder function. Two cases suffered from renal hydronephrosis and other two suffered from incontinence. It was concluded that gastric neobladder urinary diversion is satisfactory for clinical use in dogs.

This study was conducted to investigate the efficacy of the Newcastle disease (ND) live vaccines from different commercial sources used in different programs for vaccination of chicks having maternal antibodies against Mycoplasma infection. The immune response was estimated using HI and challenge tests. The effect on the chicken performance was estimated by the detection of the body weight gain. The role of vaccines in stimulating respiratory bacterial stress was pointed out by the lesion scores. Birds vaccinated with live vaccines from source (2) showed higher HI titers than those vaccinated with vaccine from source (1) and birds received the 2nd vaccination from heterologous source showed lower titers than those received from homologous source. Results of the challenge test indicated that birds vaccinated with live ND vaccines from one source and those vaccinated with Hitchner B1 at 33-days of age instead of La Sota showed 100% protection rate as compared with 95 % followed by vaccination with heterologous La Sota. Birds received Hitchner B1 of vaccine source (1) showed only 85% protection rate. All vaccinated chicken groups showed feed conversion rates lower than the non-vaccinated control one. Groups received Hitchner B1 as a 3rd dose of the vaccine showed higher rates than those vaccinated with La Sota. Results of the lesion score for chronic respiratory disease (CRD) in vaccinated groups with different regimes revealed that birds received ND vaccinal strains from source (1) having higher scores than those received ND vaccines from the 2nd source. Administration of Hitchner B1 vaccine at 33-days of age showed lower scores. Hitchner B1 can be recommended in vaccination of chickens derived from Mycoplasma infected hens.

Stabilates of Theileria parva sporozoites are mostly delivered in liquid nitrogen tanks to the East Coast fever immunization points. Using an in vitro titration model, we assessed the loss of infectivity of several stabilates when they are stored in ice baths for up to 24 h. Comparisons, with respect to rates of loss of infectivity, were made between T. parva stocks (Chitongo and Katete), cryoprotectants (sucrose and glycerol) and method of assessment (in vivo and in vitro techniques). Chitongo and Katete stabilates showed similar loss dynamics. The losses were 1-4 % (depending on parasite stock) and 3 % per hour of storage for glycerol and sucrose stabilates respectively, and the loss rates were not significantly different. The results suggest that Chitongo stabilates and sucrose cryoprotected suspensions can be delivered on ice as is done for Katete. A graphical relationship of in vitro effective dose at 50 % infectivity (ED50) and in vivo protection rate was made. The relationship showed a 35 % loss of protection for a relatively low corresponding increase of ED50 from 0.006 to 0.007 tick equivalent.

To establish a statistically reliable sampling strategy for serological surveillance of classical swine fever (CSF) in Korea, antibody test data from CSF surveillance conducted during year 2005 were analyzed. The most appropriate sampling method was determined to be stratified multi-stage random sampling strategy, in which the primary sampling unit is a pig farm and the secondary are the pigs by the strata of breeders and finishers in the selected farm. The optimum sample size was 5 to 19 including 1 to 2 breeders according to the number of pigs in the farm.

Pasteurella multocida D:4 producing Pasteurella multocida toxin (PMT) is a causal pathogen in atrophic rhinitis in pigs. To investigate the protective immunity and vaccination effect of recombinant PMT, the gene for PMT was isolated from the infective P. multocida D:4. The 2.3 kb XhoI/PstI fragment (PMT2.3) of PMT gene was expressed in E. coli BL21 (DE3) using the induced expression vector system. The recombinant protein of PMT2.3 having molecular weight of 84 kDa was purified by Ni-affinity column chromatography.

Environmental mastitis has increased particularly in well-managed or low somatic cell count herds that have successfully controlled contagious pathogens. Major pathogens of environmental mastitis are Escherichia coli (E. coli) and Streptococcus uberis. The present study was conducted to investigate the isolation and antibiotic susceptibility of 406 (21.8%) gram-negative bacteria isolated mastitis milk from 1,865 quaters of 241 Korean dairy farms from 2001 to 2004. Prevalence of major gram-negative bacteria isolated from mastitis milk were E. coli (22.7%) and Enterobacter spp. (16.3%) in coliforms and Pseudomoas spp. (10.3%) and Serratia spp. (7.9%) in non-coliforms.

Cutaneous asthenia or dematosparaxis is an uncommon, congenital and inherited connective tissue disease of dog and cat, resembling Ehlers-Danlos syndrome (EDS) in man. EDS is characterized by loose, hyperextensible and, fragile skin, it is attributed to mutations in connective tissue gene. These mutations cause defects in type Ⅰ or Ⅲ collagen synthesis and as a result lack of strength or elasticity to skin, joint, ligament and vessels. EDS-affected animals often experience subcutaneous hematomas that have long bleeding times.

The aim of this study was to compare the reaction of the cardiovascular system, and the anesthetic effect among 3 experimental groups, epidural administration of medetomidine as a single agent, the combination of buprenorphine and medetomidine, and the combination of fentanyl and medetomidine. Twenty one dogs were anesthetized with isoflurane and allowed to breathe spontaneously. Epidural, arterial, and venous catheters were inserted. The tip of epidural catheter was positioned at the level of the space between the sixth and seventh lumbar vertebra.