Héctor Ruiz, Delia Lacasta, Sergio Villanueva-Saz, José María González, Aurora Ortín, Juan José Ramos, Alfredo Ángel Benito, Agustín Estrada-Peña, Antonio Fernández, Marina Pomar, Marta Ruiz de Arcaute
{"title":"Tick control prevents carcass condemnations in lambs caused by Anaplasma ovis.","authors":"Héctor Ruiz, Delia Lacasta, Sergio Villanueva-Saz, José María González, Aurora Ortín, Juan José Ramos, Alfredo Ángel Benito, Agustín Estrada-Peña, Antonio Fernández, Marina Pomar, Marta Ruiz de Arcaute","doi":"10.1007/s11259-024-10562-2","DOIUrl":"10.1007/s11259-024-10562-2","url":null,"abstract":"<p><p>Ovine anaplasmosis is causing relevant economic losses in Spain due to icteric carcass condemnation in lambs. Anaplasma ovis infection occurs through grazing sheep that transfer ticks to their offspring. This study compared the efficacy of deltamethrin and cypermethrin pour-on treatments for tick control. A total of 250 PCR A. ovis-positive ewes and their offspring were divided into 5 groups. Group A (50 ewes/50 lambs) was kept as an untreated control group. In groups B (50/50) and C (45/93), the lambs were treated with deltamethrin pour-on and cypermethrin pour-on, respectively, one week after birth. In groups D (50/75) and E (51/68), the ewes were treated with cypermethrin pour-on and deltamethrin pour-on one week before the estimated parturition. External parasite assessment and A. ovis PCR were conducted before treatment and at 21 and 42 days post-treatment. Ewes were checked weekly for tick-detection until weaning. Lamb carcasses were examined at the slaughterhouse. Riphicephalus sanguineus sensu lato ticks were found in ewes throughout the study, with only one tick found in a control group lamb. Three lambs tested positive for A. ovis during the trial, with one condemnation at the abattoir due to jaundice. However, no significant differences were observed between treatment groups. Overall, a significant decrease in infected animals and condemned carcasses was observed compared to previous years, suggesting that deltamethrin and cypermethrin prevent A. ovis transmission from dams to lambs. Further studies are needed to confirm synthetic pyrethroids' effectiveness in controlling tick infestation and averting A. ovis transmission to lambs.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3899-3906"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11538152/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142355065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rafael Kretzer Carneiro, Ana Sofia Matos, Rafaela Della Giustina, Kaio Augusto Dos Santos, Bárbara Corbellini Rovaris, Igor Cezar Kniphoff da Cruz, Aury Nunes de Moraes
{"title":"B-mode, Doppler, and Elastography abdominal ultrasound in Tamandua tetradactyla.","authors":"Rafael Kretzer Carneiro, Ana Sofia Matos, Rafaela Della Giustina, Kaio Augusto Dos Santos, Bárbara Corbellini Rovaris, Igor Cezar Kniphoff da Cruz, Aury Nunes de Moraes","doi":"10.1007/s11259-024-10520-y","DOIUrl":"10.1007/s11259-024-10520-y","url":null,"abstract":"<p><p>The aim of this study was to describe the normal B-mode, Doppler, and 2D Shear Wave Elastography ultrasonographic findings of some abdominal structures in a six-month-old male Southern Tamandua (Tamandua tetradactyla). The animal was found and rescued by the environmental police after being discovered in the wild near its mother, who had died in a car accident. For the ultrasonographic exams, the animal's abdominal region was shaved, and only physical restraint was used. In the B-mode exam, the urinary bladder, small intestine, kidneys, left adrenal gland, stomach, liver, and gallbladder were located and evaluated. Doppler examination obtained spectral tracings of the arcuate and renal arteries of both kidneys. Elastography assessed the stiffness of the renal cortex, liver, and spleen. The ultrasound examination provided an adequate evaluation and novel findings of the Southern Tamandua abdominal structures without invasiveness.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3967-3973"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142112531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Agnieszka Żak-Bochenek, P Żebrowska-Różańska, J Bajzert, N Siwińska, J P Madej, K Kaleta-Kuratewicz, P Bochen, Ł Łaczmański, A Chełmońska-Soyta
{"title":"Comparison and characterization of the bacterial microbiota and SIgA production in different gastrointestinal segments in horses.","authors":"Agnieszka Żak-Bochenek, P Żebrowska-Różańska, J Bajzert, N Siwińska, J P Madej, K Kaleta-Kuratewicz, P Bochen, Ł Łaczmański, A Chełmońska-Soyta","doi":"10.1007/s11259-024-10489-8","DOIUrl":"10.1007/s11259-024-10489-8","url":null,"abstract":"<p><p>In the gastrointestinal mucosa, there is a close cooperation between secretory immunoglobulin A (SIgA) and the composition of the microbiota, which aims to maintain homeostasis as well as act as a protective barrier. The purpose of this study was to determine the composition of microbiota and SIgA production in different parts of the digestive tract (small intestine, cecum, colon and rectum) of nine healthy horses and its reflection in the feces. For this purpose, we determined: the composition of the microbiome (by next-generation Sequencing of Hypervariable Regions V3-V4 and V7-V9 of the 16 S rRNA gene analysis), the amount of SIgA in the intestinal content samples (by ELISA), as well as the number of IgA-producing cells (IgA+) in the tissue samples (by immohistochemical analysis). Significant differences were observed between the small intestine and the large colon in the composition and diversity of the microbiome, as well as the number of IgA + cells in the mucosal lamina propria and the abundance of SIgA in the intestinal lumen. The small intestine in relation to the large colon is characterised by fewer IgA + cells, more SIgA in the intestinal contents and a less diverse microbiome. However, the cecum appears to be the third separate ecosystem, with a high number of IgA + cells and a diverse microbiome. The fecal sample reflects the current state of the large colon, both in terms of the microbiome and SIgA content; however, it is not known to what extent it may be influenced by dysbiosis in other parts of the digestive tract.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3605-3620"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11538275/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Megha Sharma, Faslu A T Rahman, Gaurav Sharma, Sohini Dey, Madhan Mohan Chellappa, Anshuk Sharma, Kuldeep Dhama, G Saikumar, Asok M Kumar
{"title":"Immuno-pathogenesis study of local infectious bronchitis virus G1-1 lineage variant showed altered tissue tropism in experimental broiler chickens.","authors":"Megha Sharma, Faslu A T Rahman, Gaurav Sharma, Sohini Dey, Madhan Mohan Chellappa, Anshuk Sharma, Kuldeep Dhama, G Saikumar, Asok M Kumar","doi":"10.1007/s11259-024-10525-7","DOIUrl":"10.1007/s11259-024-10525-7","url":null,"abstract":"<p><p>Infectious bronchitis (IB) is an acute contagious disease of poultry caused by infectious bronchitis virus (IBV). This study investigated the immunopathogenesis and tissue tropism of an Indian IBV field isolate (IBV/Chicken/India/IVRI/Rajasthan/01/2023) in experimental broiler chickens. This isolate belongs to the G1-1 lineage and is closely associated with the Mass genotype. 10<sup>6.23</sup> EID<sub>50</sub>/0.2 mL of the virus was administered intranasally and intraocularly to the IBV-challenge group, whereas uninoculated allantoic fluid was administered to the control group. Clinical signs, gross and histopathological lesions, immunohistochemistry (IHC), viral load, humoral responses, and the relative expression of immune response genes were evaluated at seven observation points. The infected group showed a significant reduction in weight gain from 3 dpi onwards, with clinical signs of varying severity from 3 to - 11 dpi. Gross lesions and microscopic changes were observed in the nasal turbinates, trachea, lungs, and kidneys, mainly representing epithelial degeneration and necrosis with mononuclear infiltrates. The caecal tonsils also showed microscopic lesions at 7-9 dpi. Absolute viral load estimation in the organs corroborated the lesion severity scores and IHC results. The expression of innate immune responses broadly demonstrated higher expression in the trachea and lungs of the IBV-infected group during the early phase of infection, whereas similar responses were observed in the kidneys and caecal tonsils during the later phases of infection. This study suggests that the given IBV isolate may cause significant production losses in broilers and exhibit tissue tropism for both respiratory and non-respiratory tissues, triggering varying innate and adaptive immune responses.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3683-3697"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142112629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Biological characterization of lipoic acid- and heme-dependent Escherichia coli small colony variants isolated from sheep in Xinjiang, China.","authors":"Zihao Wu, Jing Li, Wei Chen","doi":"10.1007/s11259-024-10554-2","DOIUrl":"10.1007/s11259-024-10554-2","url":null,"abstract":"<p><p>Escherichia coli (E. coli) small colony variants (SCVs) have garnered attention due to their heightened antibiotic resistance and enhanced cell retention, posing significant risks to public health and food safety. However, understanding of SCVs derived from sheep remains limited. This study aimed to detect the biological characterization of sheep-derived E. coli SCVs and investigate the factors contributing to SCV development with preliminary genomic data. In this study, a lipoic acid-dependent SCV (LA-SCV) and a wild-type (WT) strain were isolated from sheep bile. Then, a heme-dependent SCV (HD-SCV) was induced from WT using amikacin. Initially, we examined factors contributing to SCV formation via comparative genomics. Subsequent comparisons between WT and two SCV strains encompassed antibiotic resistance, hemolytic activity, biofilm formation, motility, and metabolism. Genomic analyses identified a frameshift deletion mutation in the lipA gene in LA-SCV and a stopgain mutation in the hemG gene in HD-SCV, hypothesized as potential triggers for lipoic acid- and heme-dependent SCV development, respectively. Physiological, biochemical, and cultural traits exhibited notable differences between WT and SCVs, including increased antibiotic resistance, hemolytic activity, and biofilm formation, but alongside non-fermentative acetate utilization, slow growth, reduced intracellular ATP, and decreased motility (P < 0.01). The energy and amino acid metabolism were suppressed during the logarithmic phase in LA-SCV, while both logarithmic and stable phases in HD-SCV. These alterations in biological characteristics present significant challenges in managing E. coli pathogenicity and antibiotic resistance.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3859-3872"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142355057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Adina Mihaela Pîrvu, Andrea Cappelleri, Laura Sala, Barbara Banco, Chiara Giudice, Damiano Stefanello, Manuella Militaru, Valeria Grieco
{"title":"Mammary carcinoma in a male cat following long-term medroxyprogesterone acetate treatment: case report and review of the literature.","authors":"Adina Mihaela Pîrvu, Andrea Cappelleri, Laura Sala, Barbara Banco, Chiara Giudice, Damiano Stefanello, Manuella Militaru, Valeria Grieco","doi":"10.1007/s11259-024-10553-3","DOIUrl":"10.1007/s11259-024-10553-3","url":null,"abstract":"<p><p>In male cats, as in men, mammary carcinomas are rarely reported. However, like in females, hormonal therapy is a significant risk factor. This study reports the case of an 11-year-old male cat with multiple mammary tumours and a history of long-term medroxyprogesterone acetate therapy for the suppression of sexual behaviour, along with a brief review of the literature. Complete surgical removal of the right mammary chain and the ipsilateral inguinal lymph nodes was performed, and all tissues were submitted for histology. Histological examination revealed the presence of a tumour in the third and fourth mammary glands, consisting of neoplastic cells arranged in various structures, including tubulopapillary and tubular structures, sometimes cystically dilated, and solid areas. The inguinal lymph nodes were also involved. The morphology was consistent with a diagnosis of mammary carcinoma, tubulopapillary type, with nodal metastases. Immunohistochemistry revealed that tumour cells were positive for cytokeratin (clones AE1/AE3), while stromal cells were positive for vimentin (clone V9). The proliferation marker Ki-67, evaluated on both the primary tumour and the nodal metastases, was strongly expressed in the nuclei of neoplastic cells, with a Ki-67 proliferation index of 8.9% and 20% for the primary tumour and the metastases, respectively. This case highlights the importance of considering the possibility of malignant mammary tumours not only in female but also in male cats with a history of long-term hormonal treatment for suppression of sexual behaviour.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"4021-4028"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11538189/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142355062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paloma Bianca Orso, Alberto Gonçalves Evangelista, Tiago de Melo Nazareth, Carlos Luz, Keliani Bordin, Giuseppe Meca, Fernando Bittencourt Luciano
{"title":"Bacillus velezensis CL197: a zearalenone detoxifying strain isolated from wheat with potential to be used in animal production.","authors":"Paloma Bianca Orso, Alberto Gonçalves Evangelista, Tiago de Melo Nazareth, Carlos Luz, Keliani Bordin, Giuseppe Meca, Fernando Bittencourt Luciano","doi":"10.1007/s11259-024-10552-4","DOIUrl":"10.1007/s11259-024-10552-4","url":null,"abstract":"<p><p>Zearalenone (ZEA) is a mycotoxin produced by Fusarium species, and cause contamination of food and feed, with impacts in animal production and in food production chain. Effective detoxifying methods, such as biodegradation, are therefore required. This study aimed to isolate microorganisms and screen ZEA detoxifying strains. As a result, 197 microorganisms were isolated, and six were initially selected after colorimetric screening. ZEA (1 µg/mL) was added to culture media, and after 24 h, all six microorganisms were able to degrade ZEA, without the formation of α-ZOL. One isolate eliminated ~ 99% of ZEA and was identified as Bacillus velezensis CL197. ZEA metabolites produced by the bacteria were evaluated, and no metabolites with greater or similar toxicity than ZEA were detected. This strain was applied to swine in vitro digestion, and up to 64% of ZEA was degraded. B. velezensis CL197 significantly degraded ZEA, demonstrating potential to be used as a detoxifying agent in the food production chain as a biocontrol agent.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3847-3857"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11538190/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142308638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zivanayi Matore, Pamela S A Woods, Tonderai Mutibvu
{"title":"Welfare status of dairy cows reared from large scale dairy farms in Midlands Province -Zimbabwe.","authors":"Zivanayi Matore, Pamela S A Woods, Tonderai Mutibvu","doi":"10.1007/s11259-024-10543-5","DOIUrl":"10.1007/s11259-024-10543-5","url":null,"abstract":"<p><p>In Zimbabwe a lot of studies have been done on nutrition, breeding, physiology and health of farm cows but with little or no consideration of the impacts of these studies on cow welfare. As a result political importance and practical progression of cow welfare is still lagging behind in the country just like most developing countries. The aim of this study was to evaluate the welfare status of dairy cows from large scale dairy farms through an assessment of risk factors/drivers and indicators of cow welfare. For this study 728 dairy cows from all the 31 large scale dairy farms in Midlands Province, Zimbabwe, were selected for the study noting down risk factors and indicators of dairy cow welfare during both the dry and rainy season. Human avoidance distance test results revealed that 81% of the cows were touched by the approaching stockpeople, whereas 19% could not be touched, and this was significantly associated with breed of the cow (χ<sup>2</sup> = 115, DF = 9, P < 0.0005). From the study 95% of the cows examined were not lame (score 1) and for those that were lame only 0.6% (n = 4) had severely impaired mobility (score 5). Whereas 30% of the cows observed during the rainy season were heavily soiled with manure (score 4), only 1% of the cows observed during the dry season were heavily soiled (score 4). Cow cleanliness was significantly associated with manure accumulation in housing and handling facilities in both study 1 (χ<sup>2</sup> = 18, DF = 6, P = 0.006) and study 2 (χ<sup>2</sup> = 47, DF = 6, P < 0.001). The average body condition score of observed dairy cows from both study 1 and study 2 was fair (BC = 3) and body condition was signficantly associated with the breed of cow in both study 1 (χ<sup>2</sup> = 22, DF = 12, P = 0.039), and study 2 (χ<sup>2</sup> = 38, DF = 12, P < 0.005). Exotic breeds like the Holstein generally faired low when compared to locally adapted breeds like theAyrshire.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"4169-4178"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142308642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rocío Colello, M Victoria Vélez, Marcelo Rodríguez, Ariel Rogé, Analía I Etcheverría, Nora Lía Padola
{"title":"Detection of Shiga toxin-producing Escherichia coli in dairy cows: genetic characterization and inhibition of adherence by cattle anti-STEC antibodies to HEp-2 cell.","authors":"Rocío Colello, M Victoria Vélez, Marcelo Rodríguez, Ariel Rogé, Analía I Etcheverría, Nora Lía Padola","doi":"10.1007/s11259-024-10557-z","DOIUrl":"10.1007/s11259-024-10557-z","url":null,"abstract":"<p><p>Shiga toxin-producing Escherichia coli (STEC) is a zoonotic pathogen associated with severe disease. Cattle are recognized as the primary animal reservoir of STEC. This study reports the occurrence and characterization of STEC from dairy cows and evaluates the inhibition of adherence by cattle anti-STEC antibodies to the HEp-2 cell. From 151 samples, 30% (n = 45) were positive for stx by PCR screening (25.21% of dairy cows and 46.8% of growing calves). From these positive samples, 17 STEC isolates were characterized. In dairy cows, 3 out of 17 samples carried stx2, 3 out of 17 possessed stx1, and 2 out of 17 carried stx1/stx2. In growing cows, 8 out of 17 samples carried stx1 and 1 out of 17 carried stx1/stx2. Other virulence factors such as ehxA, saa, iha, cah, and eae were detected. The strains were typed into 3 E. coli O groups (O26, O91, and O130). The analysis of the HEp-2 adherence assays indicated that all serum from both cattle categories presented high levels of inhibition of adherence. Considering the severity of the symptoms caused by STEC in humans, searching for factors influencing the colonization of STEC in cattle would help identify strategies to avoid transmission and STEC infection.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3883-3888"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142355059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A first study of meat-borne enterococci from butcher shops: prevalence, virulence characteristics, antibiotic resistance and clonal relationship.","authors":"Tugba Cebeci, Elif Seren Tanrıverdi, Barış Otlu","doi":"10.1007/s11259-024-10516-8","DOIUrl":"10.1007/s11259-024-10516-8","url":null,"abstract":"<p><p>IntroductionEnterococcus, which used to be thought of as a harmless commensal living in the digestive tract, has now become a highly resistant and highly contagious pathogen that makes nosocomial infections much more common. This study examined enterococci species and their antibiotic resistance phenotypes and genotypes and virulence gene content in Turkish ground beef samples. Methodology A total of 100 ground beef samples were analyzed between May 2020 and May 2021. The isolated strains were identified via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and confirmed using polymerase chain reaction (PCR) after which they were divided into several species using PCR and tested for antibiotic resistance against 19 antimicrobial agents using the disc diffusion method. The genetic similarity analysis, pulsed-field gel electrophoresis (PFGE) was performed. Results A total of 93 isolates in ground beef were identified, comprised of E. faecalis 72.04%; E. hirae- 11.82%; E. casseliflavous- 7.52%; E. faecium- 5.3%; E. gallinarium- 3.23%. The virulence genes observed in Enterococcus species were distributed as follows: gelE 88.1%, ace 53.7%, efaA 40.8%, asaI 19.3%, esp 6.4%, and cylA 1.07%. A high antibiotic resistance was recorded for tetracycline (43.01%), followed by ampicilin (17.2%), and chloramphenicol (13.9%). 17.2% of Enterococcus isolates were multidrug-resistant. The study determined the high prevalence of antibiotic resistance genes, specifically for tet(L) 10 (10.7%), aac(6')Ie-aph(2\")-la 3 (3.2%), and ermB 3 (3.2%). The presence of efflux pump genes were identified in 74.1% of Enterococcus isolates. Genetic characterization of 67 E. faecalis isolates by PFGE revealed 41 pulsed-field gel electrophoresis (PFGE) patterns that were grouped into 15 clusters, which presented more than one strain with 100% similarity. Conclusion Isolates obtained from several areas and butchers had comparable patterns of PFGE, suggesting that the presence of circulating E. faecalis poses a potential public health concern in diverse districts. To mitigate the health hazards associated with the contamination of enterococci from raw to cooked meats, it is necessary to enhance the disinfection of butcheries, promote excellent hand hygiene among butchers, and implement appropriate meat storage and handling methods to prevent bacterial development.</p>","PeriodicalId":23690,"journal":{"name":"Veterinary Research Communications","volume":" ","pages":"3669-3682"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142112530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}