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Veterinary Research Forum - Volume:16 Issue: 1, Jan 2025

Veterinary Research Forum
Volume:16 Issue: 1, Jan 2025

  • تاریخ انتشار: 1403/10/12
  • تعداد عناوین: 8
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  • Narayani Yadav, Debabrata Mondal, Raguvaran Raja *, Ensha MA, Karam Singh, Dushyant Sharma, Arvind Das Pages 1-10
    Canine hemoprotozoan diseases viz. ehrlichiosis and babesiosis are mostly associated with critical anemia and thrombocytopenia with pancytopenic changes, leading to multi-organ failure. For faster recovery of patients with complicated hemoprotozoan diseases, whole blood transfusion or bone marrow stimulating agents to produce more red blood cells (RBCs) and platelets might be helpful. Unfortunately, canine specific transfusion procedures are expensive and even not available in many developing countries. Development of alternate therapeutic modality by bone marrow stimulation to augment the production of RBCs and platelets and thus, to treat the critical pancytopenic patients is and urgent necessity. N-acetylcysteine (NAC), acts as a precursor of reduced glutathione and increases the production of bone marrow B cells. It also improves viability and self-renewal capacity of stem cells and thus, boosts hematopoietic differentiation by protecting induced pluripotent stem cells. This study envisaged to develop alternate therapeutic approach to combat pancytopenia secondary to canine hemoprotozoan diseases. Bone marrow mediated aplastic pancytopenia was induced experimentally by administration of cyclophosphamide in rats. Bone marrow stimulating property of NAC was compared with desmopressin, another bone marrow stimulator, which revealed better in terms of hematobiochemical and histopathological changes. Results of rat model study were extrapolated in clinical canine hemoprotozoan cases having pancytopenia. Dogs treated with hemoprotozoan disease specific therapy along with NAC rendered favorable changes by haltering the progression of critical anemia and thrombocytopenia. Study revealed that supplementation of NAC along with canine hemoprotozoan specific therapy is beneficial to alleviate pancytopenia.
    Keywords: Anemia, Anti-Oxidant, Cyclophosphamide, Hematopoiesis
  • Safa Farahmand-Azar, Amir Tukmechi *, Abdolghaffar Ownagh Pages 11-18
    This study was conducted in West Azerbaijan province, Iran (37°27'18.022" N, 45°0'0" E) to investigate the genotyping and phylogenetic characterization of Mannheimia haemolytica in cattle and buffaloes from November 2022 to January 2024. Mannheimia haemolytica is a bacterium known to cause pasteurellosis pneumonia, a respiratory disease in ruminants, such as cattle and sheep. This is one of the main causes of economic losses in the feedlot industry. In addition to the deaths, treatment costs are also significant. The lung and nasal swab samples were collected from 378 cattle and buffaloes. The M. haemolytica was detected in 32 (8.46%) of the samples, with a notably higher isolation rate from lung tissue (56.25%; n = 18) compared to the nasal swabs (43.75%; n = 14). Interestingly, the study also revealed a seasonal pattern, with the highest isolation rates observed during January, February, and March. Multi-locus sequence typing demonstrated that all isolates belonged to sequence type 1 (ST1) within clonal complex 28. This finding is consistent with the global prevalence of ST1 in bovine isolates, indicating widespread distribution. Phylogenetic analysis revealed a strong correlation between ST1 and STs 30 and 54, highlighting the prevalence of ST1 in M. haemolytica among ruminants in West Azerbaijan, Iran. Further research is needed to investigate its potential for causing disease and its transmission pattern.
    Keywords: Genetic Diversity, Molecular Typing, Multi-Locus Sequence Typing, Phylogenetic Analysis, Ruminant
  • Mohammadreza Ghorani *, Amirali Shahbazfar, Mohsen Ghorbiani, Behzad Ghorbanzadeh, Rohollah Kamyabi Pages 19-25

    Fowl adenovirus (FAdV) is a DNA virus causing significant diseases, like inclusion body hepatitis, hydropericardium-hepatitis syndrome (HHS), and gizzard erosion. These diseases lead to severe economic losses in the poultry industry. Recent increases in HHS outbreaks in Iran, particularly among broilers, prompted this study to analyze FAdV isolates in Kashan, Iran. In December 2021, a high-mortality HHS outbreak in a Kashan broiler flock led to liver and heart samples being sent for analysis.Histopathological investigations revealed mononuclear hepatitis and intra-nuclear viral inclusion bodies in hepatocytes. Polymerase chain reaction and phylogenetic analyses confirmed the presence of FAdV-4 (accession number: PP856395), showing 99.99% identity with strains from Japan, the United Arab Emirates, Pakistan, and the United States. These findings highlight the genetic similarity and potential common origin of FAdV-4 strains. This study emphasizes the need for heightened biosecurity measures and effective vaccination strategies to mitigate the spread of FAdV-4. The confirmed presence of FAdV-4 in central Iran poses a significant threat to the poultry industry, necessitating prompt action to prevent substantial economic losses.

    Keywords: Broiler Chickens, Epidemiology, Fowl Adenovirus, Hydropericardium-Hepatitis Syndrome, Phylogenetic Analysis
  • Siamak Shahidi, Khadijeh Ramezani-Aliakbari, Abdolrahman Sarihi, Ali Heshmati, Elham Shiri, Shiva Nosrati, Sayed Payam Hashemi, Mitra Bahrami, Fatemeh Ramezani-Aliakbari * Pages 27-33
    Cardiac mitochondrial dysfunction is an important feature of aged heart. However, there is still no potent agent to ameliorate cardiac function abnormalities in aged hosts. Olive oil (OLO), containing monounsaturated fatty acids, has diverse protective effects on the cardiovascular system, including anti-diabetic, anti-inflammatory, and anti-hypertensive effects. We evaluated the beneficial impacts of OLO against aging-related cardiac dysfunction. Wistar rats were randomly allotted into three groups with eight rats, including control, aged rats receiving D-galactose (D-GAL), and aged rats administrated with D-galactose plus OLO (D-GAL + OLO). Aged animals were received D-GAL at a dose of 150.00 mg kg-1 daily through intra-peritoneal injection for aging induction. The animals in D-GAL + OLO group were co-administrated with oral OLO at a dose of 1.00 mL kg-1 by gavage feeding daily. The administration term was eight weeks. A histological examination of heart tissue was performed. The heart tissues were also harvested to assay the oxidative stress and molecular parameters. The aged animals showed cardiac hypertrophy, increased malondialdehyde level and Bax expression, and reduced mitofusin 2, phosphatase and tensin homologue-induced putative kinase 1, dynamin-related protein 1, and Bcl2 expressions in comparison with the control animals. The OLO treatment ameliorated all these parameters. Overall, OLO could improve cardiac aging through reducing oxidative stress, enhancing genes mediated mitophagy, and improving genes mediated apoptosis in the heart.
    Keywords: Aging, Apoptosis, Mitophagy, Olive Oil, Oxidative Stress
  • Shirin Dehghan, Masoumeh Bagheri *, Mojtaba Moharrami, Hosein Modirrousta, Naheed Mojgani Pages 35-41
    Infecting to Melissococcus plutonius, the primary cause of the European foulbrood (EFB) disease, can be followed by infecting to the secondary bacteria, such as Enterococcus faecalis and Brevibacillus laterosporus. The aim of this research was to diagnose EFB disease by tracking the causes of the disease in apiaries all over Iran. From 260 apiaries, honey bee samples were randomly collected. After samples preparation, the genomic DNA was extracted and specific primers were selected for interested bacteria. Using the conventional polymerase chain reaction (PCR) method for E. faecalis and B. laterosporus and nested-PCR method for M. plutonius, the target fragments were amplified. Desired standard bacteria and distilled water were used as positive and negative controls, respectively. Results showed that out of 260 samples from apiaries, 74 and three samples were positive for E. faecalis and B. laterosporus bacteria, respectively. Also, the results of nested-PCR showed that 58 samples were positive, of which only 12 samples were positive in the evaluation of E. faecalis. Results demonstrated that the highest and the least levels of the infection for M. plutonius and E. faecalis were in the south and east of the country, respectively. Results indicated that sometimes due to the excessive growth of secondary bacteria, the main bacteria can be removed from the environment. Also, findings proposed that those provinces with higher number of populations, followed by higher amount of air pollution, had more infected samples than others.
    Keywords: Enterococcus Faecalis, Epidemiology, European Foulbrood, Honeybee, Melissococcus Plutonius
  • Rabeh Ziaei, Hossein Ouraji, Ebrahim Najdegerami *, Reza Akrami, Hossein Chitsaz Pages 43-50
    The natural polymer poly-β-hydroxybutyrate (PHB) is converted to β-hydroxybutyric acid, which is similar to short-chain fatty acids, via microbial fermentation and host enzyme breakdown. This study investigated the impact of different PHB concentrations (Control, 1.00, 3.00, and 5.00% substitution) on growth performances and fish welfare in common carp fingerlings. After a 60-day trial, fish fed on diet containing 1.00% PHB exhibited significantly higher weight gain and improved feed conversion efficiency compared to the control group. Furthermore, analysis of enzymatic activity showed elevated levels of total protease and amylase in PHB-fed treatments compared to the control. Red blood cell counts, hemoglobin, and hematocrit levels remained unaffected and a significant increase in white blood cell count was observed in fish fed on diets containing 1.00 and 3.00% PHB compared to the control group. Furthermore, fish fed on diets containing 1.00 and 3.00% PHB demonstrated significantly higher total protein levels and lower glucose concentrations as well as reduced hepatic enzyme activities (aspartate aminotransferase and alanine aminotransferase) compared to both the control and 5.00% PHB groups. Assessment of antioxidant and immune parameters revealed significantly increased complement hemolytic activity and immunoglobulin M levels coupled with decreased malondialdehyde concentrations in the plasma of PHB-fed fish compared to the control group. In conclusion, dietary supplementation with PHB, especially at the 1.00% level, enhanced growth performance and improved nutritional and health indicators in the fingerlings. These findings suggested that PHB had the potential to be a valuable dietary additive for this species.
    Keywords: Antioxidant, Common Carp, Immunity, Poly-Β-Hydroxybutyrate, Short Chain Fatty Acid
  • Susitha Rajkumar, Loveleen Vaz, Anandhi Mathavan, Karikalan Mathesh, Shivasharanappa Nayakvadi, Solomon Rajkumar, Shirish Narnaware * Pages 51-56
    An outbreak of contagious foot rot due to Fusobacterium necrophorum infection was reported in a herd of four-horned antelopes (Tetracerus quadricornis) in a wildlife sanctuary at Goa, India. The infected animals showed signs of anorexia, limping and foot lesions, like erosions and sloughing of hooves. Mortality was recorded in two antelopes in which gross lesions, like generalized congestion of skeletal muscles and internal organs, and multi-focal to coalescing abscesses in lung, pleura, and diaphragm were observed. Histopathological evaluation of interdigital skin showed zones of coagulative necrosis, infiltration of mononuclear inflammatory cells, congestion, hemorrhage, and thrombosis in the dermis. Lung showed extensive areas of consolidation with alveolar edema, hyperemic alveolar capillaries, hemorrhage, and infiltration of inflammatory cells. The bacterial culture from heart blood, lung, liver, and kidney tissues revealed isolation of F. necrophorum being also confirmed by polymerase chain reaction (PCR) using amplification of lktA gene of F. necrophorum. In addition, the PCR also confirmed the presence of F. necrophorum DNA in the interdigital skin, lung, and liver tissues. Phylogenetic analysis showed that the F. necrophorum isolate from the present study grouped closely with isolates from Australia, China, Pakistan, and Iraq, as well as an Indian isolate from goat. The affected live animals were treated with oral antibiotics, anti-inflammatory medicines, and vitamin supplements for seven days, and recovered. This study confirmed the first outbreak of contagious foot rot and systemic infection with F. necrophorum in a herd of four-horned antelopes in India.
    Keywords: Foot Rot, Four-Horned Antelope, Lkta Gene, Pathology, Polymerase Chain Reaction
  • Niusha Adib, Azadeh Zahmatkesh *, Masoumeh Bagheri Pages 57-61
    Cell-surface proteins of Clostridium chauvoei were purified using a simple method. Bacterial cultures were centrifuged and agitated vigorously in phosphate buffered saline with or without further glycine treatment and ammonium sulfate precipitation. Rabbits were immunized subcutaneously with a blackleg disease vaccine twice with a two-week interval. Immunized sera were collected one week after the second injection. Enzyme-linked immunosorbent assay (ELISA) was performed using the proteins purified by the second method as the coating antigen. Bradford assay results showed a higher protein concentration in the second than the first method. Sodium dodecyl-sulfate polyacrylamide gel electrophoresis analysis showed multiple bands for the cell-surface proteins of C. chauvoei in the first method and a sharp band equivalent to flagellin protein in the second method. The ELISA results indicated that the purified proteins were capable of detecting antibodies against Blackleg disease vaccine. The purified protein would be an alternative antigen for indirect ELISA in order to monitor the immune response in vaccinated farm animals.
    Keywords: Clostridium Septicum, ELISA, Flagellin, Glycine, Immunity