Archives of Razi Institute最新文献

{"title":"Antibacterial Properties of Bacteriocin Purified from Serratia marcescens and Computerized Assessment of its Interaction with Antigen 43 in Escherichia coli.","authors":"S M Mousavi, B Archangi, I Zamani","doi":"10.32592/ARI.2023.78.6.2694","DOIUrl":"10.32592/ARI.2023.78.6.2694","url":null,"abstract":"<p><p>Bacteriocins are a kind of antimicrobial peptides that kill or inhibit the growth of bacterial strains. The purpose of this study was to investigate the antibacterial effect of <i>Serratia marcescens</i> on several pathogenic bacterial strains. Bacteriocin produced by <i>S. marcescens</i> was purified by chromatography with Sephadex G-75 column, and its antibacterial effect on gram-negative bacteria, including <i>Escherichia coli</i> ATCC 700928, <i>Pseudomonas aeruginosa</i> PTCC 1707, <i>S. marcescens</i> PTCC 1621, <i>Vibrio fischeri</i> PTCC 1693, and <i>Vibrio harveyi</i> PTCC 1755, were evaluated by the disk diffusion method. The structure of bacteriocin was determined by nuclear magnetic resonance spectroscopy. The interaction of bacteriocin with the antigen 43 (Ag43) of <i>E. coli</i> was evaluated by the molecular docking method. Bacteriocin extracted from bacterial isolates had antibacterial activity on <i>E. coli</i> strains but not on other studied strains. Bioinformatics analysis also showed bacteriocin docking with Ag43 with an energy of -159.968 kJ/mol. Natural compounds, such as bacteriocin, can be an alternative to common chemical compounds and antibiotics. To reach a definite conclusion in this regard, there is a need for further research and understanding of their mechanism of action.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1738-1745"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139391/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effects of Melatonin Alone or in Combination with Zinc on Gonadotropin and Thyroid Hormones in Female Rats.","authors":"F Rahimi, M Zendehdel, M J Rezaee, B Vazir, Sh Fakour","doi":"10.32592/ARI.2023.78.6.1698","DOIUrl":"10.32592/ARI.2023.78.6.1698","url":null,"abstract":"<p><p>Thyroid and gonadotropin hormones play an essential role in the regulation of regulating various physiological functions. The effects of melatonin and zinc (Zn) on these hormones have already been investigated. The aim of the present study was to investigate the effect of melatonin with and without zinc on the levels of gonadotropin hormones and thyroid hormones (triiodothyronine (T₃), thyroxine (T₄) and thyroid-stimulating hormone (TSH)) in female rats. In general, 35 sexually mature female rats were randomly divided into five treatment groups, with each group comprising 7 rats, in a completely randomized design (CRD) during the research. The rats were treated daily with Zn and melatonin via gavage as follows T1 (control 1, basal diet), T2 (control 2, treatment with normal saline) and the other experimental groups, including T₃, T₄ and T₅, were treated with Zn (40 ppm), melatonin (5 mg/kg) or a combination of Zn and melatonin at the same dose. The administration of the drugs was continued for 20 days (daily) . Plasma samples were then taken for the determination of LH, FFH, LH/FSH, estrogen, progesterone, T₃, T₄ and TSH levels. The results showed no significant differences in FSH and LH levels between treatments. Estrogen, progesterone and TSH levels were higher in the rats receiving 5 mg melatonin per day than in the other groups, but not statistically significant (<i>P</i>>0.05). However, T₃ levels decreased significantly in the group receiving 40 mg/kg Zn compared to the other experiments. (<i>P</i><0.05). The results showed no significant difference between the treatments in terms of T₄ levels (<i>P</i>>0.05). In conclusion, no remarkable changes in other variables were observed in female rats receiving melatonin, Zn or a combination of melatonin and Zn, with the exception of T₃.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1698-1708"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139389/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Histopathological Evaluation of Eggshell and DBM Combination on the Repair of Critical Size Experimental Calvarial Bone Defects in Rats.","authors":"S Masihipour, S Sabiza, A Rezaie, M Ghaderi Ghahfarokhi","doi":"10.32592/ARI.2023.78.6.1709","DOIUrl":"10.32592/ARI.2023.78.6.1709","url":null,"abstract":"<p><p>Fracture repair is a constant clinical challenge, and finding a method to promote and improve restoration is a primary goal for researchers. This is examined from various perspectives, such as fewer complications, increased speed, and cost-effectiveness. The present study aimed to investigate the effectiveness of eggshell powder, compared to the commercial form of demineralized bone matrix (DBM), in critical-size defects in rat calvarial bone. In this study, 40 adult male Wistar rats were selected and randomly divided into four groups of 10. The first group was the control group (C), the second was the eggshell powder group (E), the third was the DBM group (D), and the fourth was the one simultaneously receiving eggshell powder and DBM (DE). In these groups, a 5 mm diameter defect was created in the calvaria using a trephine. All animals received the appropriate treatment for their group. Each group was then divided into two subgroups of five. On days 30 and 60 post-surgery, these subgroups were euthanized, followed by sampling and histopathology examinations. After evaluating the repair percentage using Quick Photo software, the DE group had the highest repair percentage on days 30 and 60. Groups E and D had similar recovery percentages, with group D having a slightly higher one. There was a significant difference between all three groups and the control group. In conclusion, eggshell powder may potentially serve as a suitable substitute for some transplants.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1709-1718"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139394/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of Newcastle Disease Virus in Broiler Chickens with High Mortality of Kerman Province.","authors":"Z Boroomand, H Hadi Haghbin Nazar Pak, S Faryabi, H Hosseini","doi":"10.32592/ARI.2023.78.6.1860","DOIUrl":"10.32592/ARI.2023.78.6.1860","url":null,"abstract":"<p><p>The Newcastle disease virus (NDV) is a member of the paramyxoviridea family and has great significance in the poultry production industry, which spends a huge amount of money every year on prevention and economic loss caused by this disease. A wide range of symptoms, including respiratory and nervous disorders, as well as hemorrhage lesions in the digestive system are observed in this disease. This research investigated the presence of NDV in 10 poultry farms with high mortality and respiratory symptoms in Kerman province, Iran (between January 2020 to October 2020). Tissue samples were collected from mortalities of 10 flocks in different parts of Kerman province and inoculated into embryonated eggs. The NDV was detected in the allantoic fluid by polymerization of partial F gene protein. The virus was positive in the samples of 5 flocks. The results of the phylogenetic analysis also showed that the sequence of isolates was related to genotype II (three isolates) and sub-genotype VIId (two isolates) of NDVs. It was also found that the amino acid sequences of sub-genotype VIId isolates in the 113 to 116 positions were RRQKR and in the 117 positions was the presence of F (phenylalanine). The other three isolates were grouped with B1, Clone, and LaSota vaccines, and the amino acid sequence in the cleavage site included GRQGRL. The similarity between the studied isolates was 99.6%-98.4%. In this study, virulent viruses were isolated and tracked in broiler farms that were vaccinated with live and killed vaccines. It is recommended to pay more attention to designing the vaccination program.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1861-1867"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139388/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Fe²⁺ Nanoparticles on Pain Responses and Neural Oscillation Following Chronic Neuropathic Pain in Rats.","authors":"M H Naeimi, M T Mohammadi, M Sepandi, H Ghoshooni, M Rahimi Nasrabadi, A Gharib, Z Bahari","doi":"10.32592/ARI.2023.78.6.1852","DOIUrl":"10.32592/ARI.2023.78.6.1852","url":null,"abstract":"<p><p>Neuropathic pain, a chronic pain condition caused by nerve damage either of the peripheral or central nervous system, responds poorly to current drug treatments. The present study aimed to investigate the analgesic and anxiolytic effect of Fe²⁺ nanoparticles on chronic constriction injury of sciatic nerve (CCI)-induced neuropathic pain in rats. We also assessed the effects of Fe²⁺ nanoparticles on brain rhythmical oscillation in rats with neuropathic pain. The CCI model was induced by four loose ligations of the left sciatic nerve. Male Wistar rats were divided into four groups: control, sham, CCI, and CCI+Fe²⁺ nanoparticle (1 mg/kg). The Fe²⁺ nanoparticle was administered by gavage on the day of CCI surgery (day 0) and daily (once a day) for 21 consecutive days after CCI surgery. Behavioral studies were conducted on days -1, 3, 7, 14, and 21 after CCI. An acetone test and elevated plus maze were performed to evaluate cold allodynia and induced anxiety-like responses, respectively. A field test was conducted to evaluate innate anxiety-like behaviors. In addition, an electrophysiological study was carried out on day 21 after CCI to assess the effects of drugs on brain wave power. Application of Fe²⁺ significantly reduced cold allodynia in all tested days after CCI, compared to the CCI group. The obtained data demonstrated that Fe²⁺ nanoparticle gavage caused analgesic and anxiolytic effects on all experimental days after CCI, compared to the CCI group. The CCI surgery significantly disturbed theta, alpha, and beta power in the brain. The application of Fe²⁺ nanoparticles could not significantly change brain wave power. It is suggested that Fe²⁺ nanoparticle has analgesic and anxiolytic effects during chronic neuropathic pain in rats. Furthermore, the CCI surgery effectively disturbed brain theta, alpha, and beta power. Nonetheless, the application of Fe²⁺ nanoparticles could not change deregulated brain oscillation in rats.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1852-1860"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139402/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Comprehensive Approach to the Diagnosis and Management of Klippel Feil Syndrome.","authors":"F Siddiqui, M Talal Ashraf, M Khuzzaim Khan, B Admani, S J Sam, M Imran, M Hameed","doi":"10.32592/ARI.2023.78.6.1868","DOIUrl":"10.32592/ARI.2023.78.6.1868","url":null,"abstract":"<p><p>Klippel-Feil Syndrome (KFS) is a rare genetic disorder characterized by the abnormal development of the cervical spine, leading to the fusion of two or more cervical vertebrae. The syndrome presents diverse symptoms, including limited neck movement, chronic pain, and neurological manifestations such as limb numbness or weakness. The severity of KFS can vary significantly, and treatment primarily focuses on symptom management and preventing complications such as scoliosis or spinal cord compression. Surgical interventions are often necessary for patients with complex forms of the syndrome. Interestingly, Chiari 1 malformation, a cranial anomaly affecting the brainstem, can coincide anatomically with KFS. In this case report, we present the case of a 9-year-old patient who sought medical attention due to persistent, unchanging neck pain. The patient's medical history was notable for developmental delays and cervical restraint observed during physical examination. Magnetic resonance imaging (MRI) findings revealed hydrocephalus and brainstem descent, indicating the presence of Chiari 1 malformation. Comprehensive MRI and CT scans were performed, and a management plan was formulated, primarily involving cranial surgery and physiotherapy. Implementation of the treatment approach resulted in significant improvement in the patient's symptoms. This case highlights the significance of considering Chiari 1 malformation as a potential comorbidity in patients diagnosed with KFS who present with persistent neck pain. Early detection and appropriate management of both conditions are crucial for achieving favorable outcomes and enhancing the quality of life for affected individuals. Understanding the complex interplay between KFS and Chiari 1 malformation is essential for providing comprehensive care and tailored treatment strategies. Further research is warranted to elucidate the underlying mechanisms linking these two conditions and to explore optimal management approaches for patients with dual pathology. By reporting this case, we contribute to the existing literature and increase awareness among healthcare professionals regarding the potential coexistence of KFS and Chiari 1 malformation. Continued efforts in identifying associated anomalies and optimizing therapeutic interventions will aid in improving patient outcomes and ensuring optimal care for individuals affected by these conditions.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1868-1872"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139398/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Phycoerythrin on Antimicrobial Activity and Shelf-life Extension of the Nile Tilapia (Oreochromis niloticus) at Refrigerator Temperature.","authors":"B Nowruzi, S Jafari Porzani, S A Ali Anvar","doi":"10.32592/ARI.2023.78.6.1811","DOIUrl":"10.32592/ARI.2023.78.6.1811","url":null,"abstract":"<p><p>The present study was performed to evaluate the effect of phycoerythrin (PE) treatment extracted from Nostoc sp. on the shelf-life extension of the Nile Tilapia (<i>Oreochromis niloticus</i>) fillet at 4°C and 8°C. After extraction and purification of pigment in BG-110 medium, the pigment PE was extracted and purified with 56% ammonium sulfate followed by dialysis. After that, the effect of pigment on <i>Escherichia coli</i> and <i>Staphylococcus aureus</i> were investigated. The fillet samples were immersed in pigment solution, and their physicochemical, microbiological and sensory properties were examined. The results showed that the concentration and purity of the pigments increased after the dialysis. The results from performed chemical tests and total number of living mesophilic bacteria, psychrotrophic bacteria, <i>Staphylococcus aureus</i> coagulase positive, and coliform bacteria of the samples compared to the blank sample showed that sample treated with algae extracts were able to control the increase in these parameters. In these tests, the highest levels belonged to Nile Tilapia fillet sample Nile Tilapia fillet coated with PE solution at a temperature 8°C and the lowest amount was observed with fillet coated with PE solution at a temperature of 4˚C (P≤0.05). The results of sensory evaluation showed that the highest score of taste, texture, color, and total acceptance were observed for Nile Tilapia fillet coated with PE solution at temperature 8°C. In conclusion, the extract pigments from <i>Nostoc</i> sp. has strong antimicrobial activity and can maintain the quality parameters for controlling of spoilage bacteria and extend the shelf-life of <i>Oreochromis niloticus</i>.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1811-1821"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139406/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of Histopathological Changes of Induced Thin Layer Endometrium by Pentoxifylline and Pentoxifylline-Loaded Poly Lactic-co-Glycolic Acid on Female Rats.","authors":"S Saleem Raheem, H Falah Hasan, A Hashim Abid Ali, A Mansour Jasim","doi":"10.32592/ARI.2023.78.6.1762","DOIUrl":"10.32592/ARI.2023.78.6.1762","url":null,"abstract":"<p><p>Pentoxifylline (PTXF) is a vasoactive agent that plays a significant role in the treatment of thin-layer endometrium cases. The PTXF, also identified as oxpentifylline, is a member of xanthine derivatives and a competitive nonselective phosphodiesterase inhibitor leading to the elevation of intracellular cAMP, inhibition of tumor necrosis factor and leukotriene synthesis, activation of protein kinase A, and reduction of inflammation and innate immunity. Moreover, it is used as an agent to relieve muscle pain in people with peripheral artery disease (vascular irregularities). It is also an acceptable choice for the treatment of radiation-induced fibrosis. Therefore, the present study aimed to determine the advantageous impact of PTXF and PTXF-loaded poly lactic-co-glycolic acid (PLGA) on female rats after being exposed to ethanol to create a thin layer of the endometrium. For this purpose, 50 female rats were selected and divided into five groups (G1: negative normal control, G2: positive control, G3: PLGA only, G4: preference PTXF, and G5: PLGA-PTXF groups) for a 20-day treatment period. In this study, the histopathological section revealed a perfect improvement in the tissues of the uterine horn of female rats that induced endometria and were treated with PLGA-PTXF. In this group of rats, clear healing was achieved and there was an increase in the thickness of endometrium and myometrium, compared to the ordinary PTXF-treated group which had the lowest recovery characteristics. However, the positive control group underwent a significant decrease in terms of endometrium and myometrium thickness as well as vascular and glandular density. This study showed that the PTXF-loaded PLGA had the capacity to heal the thin layer of the endometrium by improving the levels of histopathological changes, especially regarding the thickness of the endometrium and myometrium more than the ordinary PTXF.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1762-1770"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139385/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the Antioxidant Effects of Onion (Allium cepa) on Blood Biochemical Factors and Antioxidants after Consuming Tartrazine in Rats.","authors":"A Zahedi, A Saravy, M Poorghasemi","doi":"10.32592/ARI.2023.78.6.1836","DOIUrl":"10.32592/ARI.2023.78.6.1836","url":null,"abstract":"<p><p>Colors have been added to food naturally and artificially for centuries to make them look more appetizing. According to the Food and Drug Organization, eight artificial colors were registered for the nutrition application, one of them, is tartrazine, which is widely used in foods and cosmetics. Food colors significantly decrease weight and increase proteins, liver enzymes, thyroid hormones, total cholesterol, and triglyceride. Onion, as an antioxidant, can reduce the harmful effects of artificial food colors on weight gain, antioxidant activity, and blood biochemical factors. The present study aimed to evaluate the effects of the onion's antioxidant properties on serum biochemical factors and antioxidants in Wistar rats after consuming tartrazine. Eighty Rats were divided into four groups, 20 mice in each. The first group received water without additives and was considered the control, the second group received tartrazine, the third group received tartrazine with onion juice, and the fourth group received only onion juice through gastric gavage. This experiment was performed for 60 days, and then the antioxidant activities of superoxide dismutase (SOD), Catalase (CAT), glutathione peroxidase (GPx), and the biochemical parameters of high-density lipoprotein (HDL) and low-density lipoprotein (LDL) were measured. Tartrazine decreased the antioxidant activities of SOD, CAT, GPx, and the biochemical parameters of HDL and LDL. The results showed that the consumption of tartrazine causes the production of free radicals, which is the reason for the significant reduction of antioxidant activities and serum biochemical factors. Onion, as an antioxidant in this study, reduces the effects of tartrazine on antioxidant activities and serum biochemical factors.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1836-1842"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139397/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Isolation of Bacillus licheniformis from Bovine Mastitis in Iran.","authors":"B Nayeri Fasaei, I Ashrafi Tamai, S M Joghataei","doi":"10.32592/ARI.2023.78.6.1690","DOIUrl":"10.32592/ARI.2023.78.6.1690","url":null,"abstract":"<p><p><i>Bacillus licheniformis</i> is a gram-positive, endospore-forming, saprophytic and facultative anaerobe that is resistant to heat and environmental conditions. This study was the first to isolate and confirm <i>B. licheniformis</i> as a cause of bovine mastitis in Iran. In the summer of 2020, 105 samples of mastitic milk were collected from dairy farms around Tehran and sent to the microbiology laboratory of the Faculty of Veterinary Medicine at the University of Tehran. The bacterial pathogens were identified using selective and differential culture media and confirmed by PCR to contain the toxin synthetase genes <i>licA</i>, <i>licB</i> and <i>licC</i> in mastitic isolates of <i>B. licheniformis</i>. Resistance patterns to 19 antibiotics were determined for two isolates of <i>B. licheniformis</i>. <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> were identified as the most important organisms in the samples. <i>B. licheniformis</i> was isolated from the two samples containing all three genes. Both isolates were resistant to streptomycin, trimethoprim-sulfamethoxazole, cefixime, ampicillin, bacitracin, clindamycin, and gentamicin. <i>B. licheniformis</i> was reported for the first time in Iran as a cause of bovine mastitis with clinical symptoms. The first isolation of toxin-producing strains of <i>B. licheniformis</i> from mastitic cows in Iran raises concerns about the safety of dairy products. In principle, selected strains with toxigenic potential should not be used as feed additives and animal feed. However, whole genome sequencing is proposed to search for genes coding for toxins.</p>","PeriodicalId":8311,"journal":{"name":"Archives of Razi Institute","volume":"78 6","pages":"1690-1697"},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11139393/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141199386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}