Iraqi Journal of Veterinary Sciences

This study aimed to investigate the occurrence and histopathological features of neoplastic conditions in different species of animals that attending the Veterinary Teaching Hospital, College of Veterinary Medicine, University of Mosul. Samples had been collected from animals with variable neoplastic lesions. The results of this study showed that the total number of the excised tumours was 36, those were noticed in cattle 30.6%, sheep 22.2%, dog 10.4%, poultry 13.9%, cat 11.1%, and goat 2.8%. The tumours were diagnosed as squamous cell carcinoma 22.22%, fibroma 19.44%, adenoma 13.89%, pulmonary adenomatosis and fibrosarcoma 11.11%, leucosis and lymphoma 8.33%, thymoma, and transmissible venereal tumour 2.78%. We concluded from the current study occurrence a different type of tumours which was malignant or benign in different species of animals.

In present study we aimed to introduce modifications in classical protocol applied to stain collagen fibers by Masson's trichrome stain, in order to decrease time and concentration of different steps and chemical in this traditional protocol. The experiment design contains a series of successive amendment steps based on previously successful steps, in which every step where be modified to get the best result, then the next step of staining protocol will be modified in the classical Masson's trichrome staining protocol in a samples of tissue from liver, heart and intestines of sheep diagnosed with chronic fasciolosis. The result showed that the new modified protocol gives the same staining efficiency to collagen fiber when we used Harris hematoxylin as a nuclear strainer or even excluded this stain from staining protocol. In conclusion this new modified staining protocol give a perfect staining reaction to collagen fibers in pathological samples which is similar to that obtained by Masson's trichrome stain, also this new modified procedure is less time consuming and less toxic effect on human and environment than other trichrome stains, and can be easily conducted either by the technician or the pathologists.

The aim of the present study was to determine the acute toxicity of chlorpyrifos and deltamethrin in mice separately and to study their toxic and neurobehavioral effects. Median Lethal Doses (LD₅₀) of chlorpyrifos and deltamethrin were determined depending on up and down method. The oral LD₅₀ of chlorpyrifos was 193.05 mg/kg and of deltamethrin was 15.71 mg/kg in mice. The oral administration of chlorpyrifos 155 mg/kg and deltamethrin 12.56 mg/kg represent 80% of LD₅₀ resulted in acute signs of poisoning that manifested by dyspnea, salivation and lacrimation at 100%, piloerection, straub tail, tremors, convulsions and death at 70% for chlorpyrifos and 60% for deltamethrin and writhing reflex at 20% for chlorpyrifos. Oral administration of chlorpyrifos 310 mg/kg and deltamethrin 24 mg/kg increased severity of toxicosis signs as a percentage of piloerection, straub tail, tremors, seizures and death 100%. As well as decrease the onset of tremors, convulsions and death, writhing reflex which appears at 20% for chlorpyrifos and 10% for deltamethrin. After three hours of chlorpyrifos and deltamethrin oral administration at doses represent 20% and 10% of LD₅₀ there are significantly hypoactivation in open-field activity, significantly increased in the duration of negative geotaxis performance, significantly decreased in head pocking and swimming scores compared to control group. In conclusion we found that deltamethrin was more toxic than chlorpyrifos this is based on the LD₅₀ value. However, the signs of toxicosis and neurobehavioral effects produced by both toxicants were not differential and could not be associated with the toxic level.

The present study was conducted to estimate the incidence, clinical findings, cytological and histopathological characteristics of spontaneously occurring skin neoplasms in dogs. A total of 40 grossly suspected cases of cutaneous and subcutaneous tumors were gathered during the period from July 2016 to August 2018 from male and female dogs in Baghdad city. Dogs with skin neoplasia revealed various clinical signs, and their ages were older than 5 years to 15 years. German shepherd 30% followed by Terrier dogs 25% were more influenced than other breeds. Concerning tumor features, the majority of neoplasms had solitary lesion 70%, regular shapes 65% with black color 55%. The tumors frequently occurred on fore-limbs and abdomen, and 80% of them lasted for 1-6 months. Cytological examination was valuable for initial evaluation of benign and malignant tumors. Its results were confirmed by the histopathology, in which the majority of neoplasms sized more than 5 cm and grade I. Nine different types of skin neoplasms were recognized, while 65% of them were malignant, the others were benign. Squamous cell carcinoma and adenocarcinomas were the most common comprising 35% and 25%, respectively.

The present study was designed to identify the histopathological effect of fluoxetine (fluoxetine hydrochloride) on the pregnant mice brain and their fetuses as well as recording weight changes at doses of 60 and 80 mg/kg of body weight which were administrated to the pregnant mice from the 7^th up to the 18^th day of pregnancy and once a day. The results showed histopathological lesions in the adult pregnant mice brain at the dose of 60 mg/kg. induced massive necrotic area of neurons in the cerebral cortex, necrosis of the molecular layer cells while the dose of 80 mg/kg the changes include vasogenic edema in the sub cortical area, severe degeneration and necrosis of the cortex. The lesions in cerebellum were more severe than recorded in the cerebrum. The results also showed the presence of many lesions in the fetus brain at the dose 60 mg/kg and they were degeneration, necrosis of many neurons in the cerebrum while at the dose of 80 mg/kg. There were increase of degeneration and necrosis in the cortical area of fetus brain. In conclusion, the use of fluoxetine in pregnant mice caused decrease in body weight and Histopathological changes in the brain of both of the mothers and their embryos, thus the use of antidepressant by pregnant woman can be harmful for the mothers and the fetus.

This study was conducted for diagnosis and description of the pathological changes of AIV-H5 as the causative pathogen in Iraqi broiler farms. The current study was carried out on 84 broiler farms. Infected birds were tested for detection of the AIV infection from the tracheal swabs by rapid chromatographic AIV type A and H5 test kits. In RRT-PCR 8 samples (8 farms) of Trachea were selected to be tested by this assay. Samples of trachea, lung, and spleen from the dead birds with natural AIV-H5 infection were submitted for histopathological examination. seventy-two out of 84 farms tested for AIV-Type A gave positive results, and 58 out of 72 positives for type A-AIV gave a positive result for H5 antigen in a rapid chromatographic strip. The main gross lesions in the trachea of infected birds were severe congestion and hemorrhage. In the RRT-PCR assay, 8 out of 8 samples gave a distinct positive result for this test. The microscopic histopathological examination of infected tracheas showed obvious desquamation of lining epithelium with complete loss of cilia associated with congestion of blood vessels in lamina properia. Infected lungs revealed diffuse alveolar damage and severe multifocal vascular congestion. There was deposition of fibrinous material in the splenic tissue associated with the disappearance of the germinal centers. Thus, we concluded that AIV-H5 infection causes severe pathological and histopathological changes as a result of systemic infection. The RRT-PCR assay was highly sensitive and specific for the detection of highly pathogenic avian influenza virus subtypes.

This study was undertaken to determine the antidiabetic effects of oral administration of Punica granatum L. extract on serum and tissues of streptozotocin induced diabetic rabbits at 100 mg/kg. The present study was carried out at the Faculty of veterinary Medicine, Tikrit University, from February to August 2017 for 10 weeks. For this purpose, 30 rabbits were randomly separated into three groups, each containing 10 animals: Group 1, healthy control rabbits; Group 2, diabetic rabbits received streptozotocin (STZ, 65 mg/kg); Group 3, diabetic rabbits treated with PS extract (the 100 mg PS+1 ml DW) for 21 days. At the end of experiment, blood samples were taken for measuring serum biochemical parameters. For histopathological evaluation, sections of kidneys were fixed in 10% buffered formalin and 5micron thick sections with H&E stain were prepared using routine histopathological techniques. The treatment revealed that PSE extract significant decreased serum glucose throm-bospondin-1, nitric oxide, alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase alkaline phosphatase, and C-reactive protein in diabetic treated rabbits as compared to diabetic rabbits. Histopathology of kidney showed lesions similar to human glomeruloscleroses, glomerular membrane thickening, arteriolar hyalinization and tubular necrosis. From the above one can conclude that PSE extract possess nephroprotective effect in experimentally induced diabetic rabbits.

The aim of this study was to investigate the ameliorative effect of Broccoli against lead acetate (PbA) hepatotoxicity by some physiological and histological indicators. The results showed that intraperitoneal (I.P.) injection by 12 mg/kg body weight of lead acetate once a week for 8 weeks led to an increase in the activity of Glutamate pyruvate transaminase (GPT), Glutamate oxaloacetate transaminase (GOT), Alkaline phosphatase (ALP), Acid phosphatase (ACP), Total serum protein (TP) and Total serum bilirubin (TSB). Liver's histological sections of lead acetate injected rats showed infiltration of inflammatory cells with sinusoid dilation, necrosis, and apoptosis of Kupffer cells. Broccoli has an ameliorative effect, that the physiological parameters and histological examination have been showed an improvement. In conclusion, lead acetate produces hepatic disorder and the potential use of Broccoli as a source of natural antioxidants or nutraceuticals protects against lead acetate hepatic toxicity.