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Effect of electromagnetic field exposure on mouse brain morphological and histopathological profiling
2020
Zymantiene, Judita | Juozaitiene, Vida | Zelvyte, Rasa | Oberauskas, Vaidas | Spancerniene, Ugne | Sederevicius, Antanas | Aniuliene, Albina
Mobile phones (MP) and other electronic and communication devices that are used daily expose users to electromagnetic fields (EMF) and contribute to an increasing incidence of neurological disorders. Brain tissue is the closest organ to the MP as it operates, thus the influence of MP radiation on brain tissue is of particular concern, although research is still inconclusive. The present study investigated the possible effect of an EMF (1,350–1,375 megahertz (MHz)) from an MP on morphological and histopathological profiles in the mouse brain. Healthy BALB/c mice were assigned to three equal groups (a control and two experimental groups, n = 10 each). Experimental mice were exposed to EMFs continuously for 72 h, those of experimental group I to a 1,350 MHz field at a specific absorption rate (SAR) of 4.0 W/kg, and group II to a 1,375 MHz field EMF at an SAR of 4.0 W/kg. Brain segmentation and histopathological analysis were applied to detect changes in the morphometric parameters of the brain lobes and identify pathological lesions, respectively. Histopathology results revealed shrinkage of pyramidal neurons, presence of mild perivascular and perineural oedema, and some vacuolation of neurons and glial cells derived from mouse great hemispheres. The lesions also included reduction of Purkinje cells, vacuolisation of neurons and glial cells, and interstitial oedema in the cerebellum. MP distance of 3 cm from the cage may induce appreciable morphological changes in mouse brain structures; therefore, more comprehensive research is essential for assessment of safe distance. These pronounced effects may interfere with the results of laboratory tests on murine experimental models in veterinary or biomedical research.
Afficher plus [+] Moins [-]Molecular characterisation of the Mycobacterium bovis causing bovine tuberculosis outbreaks in Poland
2020
Krajewska-Wędzina, Monika | Kozińska, Monika | Radulski, Łukasz | Lipiec, Marek | Augustynowicz-Kopeć, Ewa | Weiner, Marcin | Szulowski, Krzysztof
Since 2009, Poland has been recognised as a country officially free of bovine tuberculosis (bTB), although in each year of the last five there were from 8 to 18 outbreaks of the disease. In 2008–2016, the largest number of cattle infected with bovine mycobacteria were eliminated in the Masovian Province (the central region of Poland) and the largest number of outbreaks of this zoonosis were recorded in this area. The close proximity of farms where bTB was found led to the suspicion that tuberculosis could have been transmitted between the affected herds. The aim of the study was the molecular characterisation of the pertinent M. bovis/caprae strains and determination of the epidemiological relationship of various bTB outbreaks. The material for microbiological tests came from 119 cattle (Bos taurus) from nine herds located in five provinces, neighbouring the Masovian Province. Laboratory tests of tissue material gave results confirming tuberculosis in 54 (45%) animals. All strains belonged to the Mycobacterium bovis species. A two-step analysis of genetic affinity allowed 50 strains to be identified as phylogenetically closely related and separated between three genetic clusters consisting of 2 to 27 strains. Based on the results of genotyping, bTB outbreaks were found in three herds, and three transmission chains were identified among these herds.
Afficher plus [+] Moins [-]Investigation of the Effects of N-Acetylcysteine on Asprosin Hormone Activity and Liver Tissues in Rats with Experimentally-Induced Diabetes
2022
Aydin, Hasan | Yalcin, Alper | Turk, Ahmet | Özdi̇ller, Orhan | Yoldas, Atila | Keles, Hikmet | Bhaya, Muhammad Nasir
To investigate the possible effect of N-acetylcysteine (NAC) treatment on rat diabetes-induced liver damage and immune reactivity of asprosin hormone in the liver. Twenty-eight Wistar albino male rats were used in the study. They were separated into 4 groups as Control (n=7), Diabetes (n=7), Diabetes+NAC (n=7), and NAC (n=7). The rats in all groups were dissected after the treatment, and liver tissues were taken for pathological examination. Tissue sections were stained with immunohistochemistry for detecting asprosin immunoreactivity, hematoxylin-eosin and picrosirius red staining were performed to determine the changes in the tissues.In the microscopical examination of hematoxylin-eosin-stained sections normal histological hepatic tissues were seen in the Control and NAC groups. Pathological examination of liver tissue from diabetic rats showed marked dissociation, fibrosis, degeneration, inflammation, necrosis, Kupffer cells activation, bile duct proliferation, and congestion. A significant decrease in these lesions was observed in the DM+NAC group. Immunohistochemical studies showed that asprosin immunoreactivity was increased in the DM group in a significant manner. Asprosin expression was observed to be significantly reduced in the DM+NAC group in comparison to the DM group.Our findings show that NAC administration reduces liver damage in diabetic rats and can be used to reduce/eliminate the negative effects of diabetes in rat liver tissue..
Afficher plus [+] Moins [-]Effects on the wound healing process using ozonated oils (Sesame, Nigella sativa, Hypericum perforatum) in rats
2021
Canpolat, Ibrahim | Eroksuz, Yesari | Rizaoglu, Tamara
In this study, the effects of three different ozonated oils (Sesame, Nigella sativa and Hypericum perforatum) on wound closure rate, healing process and possible complications were examined macroscopically and microscopically. Twenty-one adult Wistar albino female rats were used in the study. Subjects were divided into three groups, early wound healing, (7 days), medium wound healing, (14 days) and late wound healing (21 days). Four full-thickness skin wounds of equal size (10 mm in diameter) were formed on the back regions of all rats. This region was chosen for preventing self-inflicted injuries and reducing external irritation. The wound was left open during the healing process. While the first wound (control) received no treatment in the second wound, ozonated Sesame oil, in the third wound ozonated Nigella sativa oil and in the fourth wound ozonated Hypericum perforatum oil were used. No group obtained parenteral drug administration. First, second and third main groups were euthanized on days 7, 14 and 21, respectively. The wound healing was assessed macroscopically daily. Wound sizes of individual rats were measured with a caliper and digitally photographed every day from the day of injury. After euthanasia, all wound sites of the subjects were evaluated histopathologically.There were no significant differences in wound healing between treatments in the first day 7. On they 14, it was found that the healing was better in the group applied Nigella sativa and Sesame oils (p≤0.05). On day 21 wound healing was completed in all subjects with a resultant of better outcome in Nigella sativa oil treatment compared with others (p≤0.01).In this study the best wound healing outcome was achieved with Nigella sativa oil and Sesame oil where three different minced oils were used.
Afficher plus [+] Moins [-]Evaluation of the effect of Carvacrol on retinal neovascularization in rats
2021
Kaymaz, Abdulgani | Eri̇msah, Sevilay
To compare the effect of intraperitoneal administered Carvacrol with bevacizumab in an oxygen-induced retinopathy (OIR) model in rats. Twenty-eight newborn rats were included in the study and the OIR model was created with the 50/10% oxygen style. The study consisted of 4 groups and each rat in the groups received an intraperitoneal injection of 0.01 mL once on the postnatal 14th day. While the OIR model was not created in Group I (control group), it was created for Groups II, III, and IV. Groups I and II were injected with 0.9% NaCl solution, Group III with bevacizumab, and Group IV with carvacrol. The rats were sacrificed on the postnatal 18th day.Histopathological and immunohistochemical studies showed that the number of retinal vascular endothelial cells (RVECs) and nuclear factor (NF)-κB levels decreased similarly in Group III and Group IV compared to Group II. RVECs values for Group I, Group II, Group III and Group IV were measured as 1.26±0.80, 27.10±3.63, 7.54±1.38, and 6.22±1.22, respectively and it differed significantly between groups (p<0.001). Likewise, NF-κB levels were recorded as 0.61 ± 0.30, 4.36±0.65, 2.68±0.44, and 2.85±0.58, respectively and it differed significantly between groups (p<0.001). On the other hand, RVECs and NF-κB levels were similar between Group III, and Group IV (p values were 0.58 and 0.91, respectively).The study demonstrated that carvacrol significantly reduced retinal pathological neovascularizations, RVECs, and NF-κB levels. Moreover, the observed effects were comparable to those of bevacizumab.
Afficher plus [+] Moins [-]The Distribution of Activating Transcription Factor 6 (ATF6) and Nerve Growth Factor (NGF) in the Duodenum Tissue of Diabetic and Non-Diabetic Rats
2021
Aras, Sukran | Karadag Sari, Ebru | Dag, Serpil
This study was conducted with the purpose of investigating the distribution of the Activating Transcription Factor 6 (ATF6) and the Nerve Growth Factor (NGF) in the duodenum tissue of diabetic and non-diabetic rats. Eighteen female Sprague dawley rats were randomly divided into three groups as thecontrol, sham and diabetes groups. Routine histological and immunohistochemical methods were appliedon the duodenum tissues collected at the end of the study.Results: It was determined that the villus length measurements showed a statistically significant differencebetween the control and diabetes groups. There was NGF immunoreactivity which was moderate anddiffuse cytoplasmic in the villus intestinalis and muscularis layer in all groups, weak in the crypts andglands in the control and sham groups and moderate and diffuse cytoplasmic in the diabetes group. ATF6immunoreactivity was determined moderate in the villus intestinalis, crypts, glands and muscularis layerin the control and sham groups and strong diffuse cytoplasmic in the diabetes group. It wasdetermined that both NGF and ATF6 immunoreactivity increased in the duodenum tissue of the rats onwhich diabetes was induced experimentally.
Afficher plus [+] Moins [-]Common pathogens diagnosed in pig samples from year 2014 to 2017 by Veterinary Research Institute
2018
Aisya Naama T. | Azizah D. | Masrin A. | Nurulaini R. | Roslina H. | Zurin Azlin M. J. | Chandrawathani, P. | Sohayati A. R. | Nurul Fatiha A. S. | Roseliza R.
A total of 23,322 specimens collected between 2014 and 2017, froma total of 2,592 cases, were received in Veterinary Research Institute, Ipoh (VRI) from various states in Malaysia and testedfor common bacterial, viral, and parasitic diseases in pigs. The highest occurrence of isolated bacteria from 771 samples whichtested positive were Salmonella (47.38%) and Escherichia coli (15.68%), followed by Staphylococcus (6.62%), Streptococcus (5.57%), Klebsiella pneumonia (4.88%), Pseudomona (3.38%), Acinetobacter (3.14%), Aeromonas (2.79%), Enterobacter (2.44%), one each of Bacillus and Pasteurella multocida (1.74%), Enterococcus (1.39%) and Corynebacterium (1.05%). 1.74% of each bacteria detected were Moxarella, Aspergillus, Burkholderia andChromobacterium. Positive samples tested by ELISA was Japanese encephalitis virus (JEV) (9.15%), Aujezsky disease virus (ADV)(5.37%), porcine cirvo-virus-2 (PCV2) (5.09%) and porcine reproductive and respiratory syndrome virus (PRRSV) (4.52%). Positive amples tested by the molecular test wasPCV2 (1.62%), PRRSV (1.32%) and classical swine fever virus (CSFV) (0.4%). Serology tests were conducted on 11,305 samplesand reported positive for Brucella suis (15.32%), Brucella abortus (0.62%), Brucella melitensis (0.85%), and melioidosis (0.05%). Parasitology analyses on 99 samples. revealed presence of 10.1% coccidia and 1% each of helminths and Sarcocystis. Within the 4-year period, there were no positive samples for porcine parvovirus (PPV), Nipah virus, swine influenza virus (SIV), and bacteria of Johne’s disease and leptospirosis. Continuous assessment is required to establish a comprehensive baseline data of swine diseases in Malaysia.
Afficher plus [+] Moins [-]Equine pituitary pars intermedia dysfunction: An international survey of veterinarians' approach to diagnosis, management, and estimated prevalence
2017
Carmalt, James L. | Waldner, Cheryl L. | Allen, Andrew L.
The objectives of the present study were to determine if diagnosis and treatment of equine pituitary pars intermedia dysfunction (PPID) vary by geographic region and to report the prevalence of PPID in horses as observed by veterinarians across locations. An online questionnaire was developed for veterinarians who treat horses. Veterinary associations, especially equine specialty subgroups, were contacted and a survey link was sent to members of each organization. Generalized linear models were used to examine whether the method of diagnosis and treatment of this condition, as well as its reported prevalence, differed by geographic region. Veterinarians from 426 separate clinics in 20 countries returned surveys. Diagnosis of PPID varied by region, but was usually based on clinical signs and an adjunct endocrine test. Horses with PPID were treated medically by 63% of veterinarians and 75% of these used pergolide mesylate as treatment. The median prevalence estimated was 1% and this did not differ by geographic location. Half the veterinarians were caring for 5 or more animals with PPID. Overall, diagnostic approach differed in geographic regions. In general, European veterinarians were more likely than those in North America to diagnose PPID based on clinical signs alone, without using an adjunct laboratory test. Veterinarians reported that cost and management responsibilities were their clients' primary concerns associated with the long-term treatment of this disease, which indicates a need for additional treatment options for PPID.
Afficher plus [+] Moins [-]Gross and histomorphology of the ovary of Black Bengal goat (Capra hircus)
2016
Haque A. | Haque Z. | Parvez M. N. H. | Quasem M. A.
Ovary plays a vitalrole in the reproductive biology andbiotechnology of female animals. In thisstudy, both the right and left ovaries ofthe Black Bengal goat were collected fromthe slaughter houses of different Thanasin the Mymensingh district. For each ofthe specimens, gross parameters such asweight, length and width were recorded.Then they were processed and stained withH&E for histomorphometry. This studyrevealed that the right ovary (0.53 ± 0.02g) was heavier than the left (0.52 ± 0.02 g).The length of the right ovary (1.26 ± 0.04cm) was lower than the left (1.28 ± 0.02cm) but the width of the right (0.94 ± 0.02cm) was greater than the left (0.90 ± 0.03cm). The diameter of ovarian follicles inthe cortex was measured as primordial 39.6± 6.61 µm, primary single layer 54.0 ± 4.06µm, primary multi-layer 147.6 ± 11.04 µm,secondary with C-shaped antrum 449.5 ±75.71 µm and graafian 1.3 ± 0.20 mm. Inthe graffian follicle, the thickness of thegranulosa cell layer was 79.2 ± 11.04 µm,theca interna 75.76 ± 6.82 µm, theca externa130.07 ± 12.53 µm and the oocyte diameterwas 109.8 ± 5.75 µm. These results will behelpful to manipulate ovarian functions insmall ruminants
Afficher plus [+] Moins [-]A case study of Capillaria hepatica infection in wild rats in Kelantan, Malaysia
2016
Che Mud C. M. | Ab Halim H. | Norlida O. | Wan Norul Huda W. A. W. | Nur Ain Shafikah M. S.
Nematode eggs in liver tissues of two wild rats were recorded atthe Regional Veterinary Laboratory, Kota Bharu from 2014 to 2015. A total of 15 (2014) and 48 (2015) wild rats were examined by the laboratory for routine screening of zoonotic pathogens such as Leptospira sp. and others. On histological examination of the haematoxylin and eosin (H&E) stained liver tissues, masses of parasitic nematode eggs were observed. The shell of the eggsis striated with shallow polar prominences at either end. Numerous mini-pores can be seen on the outer shell as well. The eggswere identified as Capillaria hepatica (C. hepatica) nematode eggs, which causes hepatic capillariasis in rodents and numerous other mammal species, including humans. The wild rats were alsoshown to harbour Salmonella enteritidis from the intestine, E. coli from the lung and liver but none had leptospirosis by PCR. The purpose of this report is to highlight a common nematode of wildrats that is Capillaria hepatica infection in wild rats in Kelantan diagnosed by the Kota Bharu Regional Laboratory, in orderto create the awareness on concurrent parasitic infections which may cause reduced immunity thereby creating higher risk for other zoonotic pathogens such as leptospirosis.
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