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Mramba RP, Mohamed MA. The prevalence and factors associated with mastitis in dairy cows kept by small-scale farmers in Dodoma, Tanzania. Heliyon 2024; 10:e34122. [PMID: 39055811 PMCID: PMC11269900 DOI: 10.1016/j.heliyon.2024.e34122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 07/01/2024] [Accepted: 07/03/2024] [Indexed: 07/28/2024] Open
Abstract
Bovine mastitis is among the major diseases of economic importance in the dairy industry worldwide. Hygienic conditions during milking and housing are important determinants of mastitis infections. However, arid and semi-arid areas have a scarcity of water, which is an essential component of cleanliness. Thus, the study determined the prevalence of mastitis and associated factors in Dodoma, a semi-arid region in Tanzania. Three hundred and sixty-eight lactating cows were selected randomly from 114 farms in the Dodoma urban district for mastitis determination based on clinical signs and the California Mastitis Test. About 59.8 % of the cows had mastitis, and the subclinical type dominated. Factors associated with mastitis prevalence were cleanliness (hand and udder washing before milking), farmers' awareness of mastitis, the cow's parity and lactation stage, and herd size. Milk yield was not associated with the mastitis status of the cow but was related to the breed of the cow, whether warm or cold water was used to wash the cow's udder, parity, and lactation stage. Improvement in education on the importance of hygiene is necessary, as 38.6 % of the farmers were unaware of mastitis. Further detailed studies on microbiology, such as bacteriologic culture and polymerase chain reaction, are recommended to formulate interventions.
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Twomey L, Furey A, O'Brien B, Beresford T, Moloney M, Gleeson D. Evaluating the effectiveness of minimum chlorate technologies employed by manufacturers of skim milk powder from both microbiological quality and chemical residue perspectives. J Dairy Sci 2024:S0022-0302(24)00993-7. [PMID: 39004119 DOI: 10.3168/jds.2024-24690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 06/14/2024] [Indexed: 07/16/2024]
Abstract
Dairy processors in the Republic of Ireland have adopted chlorine-free chemicals for cleaning and chlorine gas for water disinfection as a means of minimizing chlorate residue in dairy products. For these 'minimum chlorate technologies' to be satisfactory, they must be able to deliver product with acceptable levels of bacteria as well as minimum levels of chlorate and other chlorine based residues. To establish the effectiveness of these technologies, sampling was conducted across the skim milk powder (SMP) manufacturing chain in 3 separate milk processing sites. Across the 3 sites a total of 11 different batches of SMP were sampled in duplicate from the whole milk silo through the manufacturing process to the powder product; yielding a total of 137 samples. Samples were tested for chlorate, perchlorate and trichloromethane alongside a suite of microbiological plate count tests including total bacteria, thermophilic bacteria, thermoduric bacteria and both mesophilic and thermophilic spore-forming bacteria. Chlorate was detected at reportable levels (≥0.01 mg/kg) in 9 of 22 SMP samples analyzed; resulting in a mean chlorate concentration 0.0183 mg/kg. Bacteria were ubiquitous across all samples analyzed with spore-forming bacteria counts ranging from 1.30 to 2.33 log cfu/ g in SMP.
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Affiliation(s)
- L Twomey
- Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland; Department of Physical Sciences, Munster Technological University, Bishopstown, Cork, Ireland
| | - A Furey
- Department of Physical Sciences, Munster Technological University, Bishopstown, Cork, Ireland
| | - B O'Brien
- Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - T Beresford
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - M Moloney
- Teagasc Food Research Centre, Ashtown, Dublin, Ireland
| | - D Gleeson
- Teagasc Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland.
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Menezes KV, Duarte CEDS, Moreira MG, Moreno TDJC, Pereira VJDS, Ucella-Filho JGM, Otenio MH, Ignacchiti MDC, Resende JA. Enterobacteria in anaerobic digestion of dairy cattle wastewater: Assessing virulence and resistance for one health security. WATER RESEARCH 2024; 252:121192. [PMID: 38309066 DOI: 10.1016/j.watres.2024.121192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/26/2023] [Accepted: 01/23/2024] [Indexed: 02/05/2024]
Abstract
Samples from a dairy cattle waste-fed anaerobic digester were collected across seasons to assess sanitary safety for biofertilizer use. Isolated enterobacteria (suggestive of Escherichia coli) were tested for susceptibility to biocides, antimicrobials, and biofilm-forming capability. Results revealed a decrease in total bacteria, coliforms, and enterobacteria in biofertilizer compared to the effluent. Among 488 isolates, 98.12 % exhibited high biofilm formation. Biofertilizer isolates exhibited a similar biofilm formation capability as effluent isolates in summer, but greater propensity in winter. Resistance to biocides and antimicrobials varied, with tetracycline resistance reaching 19 %. Of the isolates, 25 were multidrug-resistant (MDR), with 64 % resistant to three drugs. Positive correlations were observed between MDR and increased biofilm formation capacity in both samples, while there was negative correlation between MDR and increased biocide resistance. A higher number of MDR bacteria were found in biofertilizer compared to the effluent, revealing the persistence of E. coli resistance, posing challenges to food safety and public health.
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Affiliation(s)
- Kássia Vidal Menezes
- Graduate Program in Veterinary Sciences, Center for Agricultural Sciences and Engineering - CCAE, Federal University of Espírito Santo - UFES, Alto Universitário, no number, Guararema, Alegre, ES 29500-000, Brazil
| | | | - Myleny Goularte Moreira
- Department of Pharmacy and Nutrition, Federal University of Espírito Santo - UFES, Alegre, ES 29500-000, Brazil
| | | | - Vitor José da Silva Pereira
- Department of Pharmacy and Nutrition, Federal University of Espírito Santo - UFES, Alegre, ES 29500-000, Brazil
| | - João Gilberto Meza Ucella-Filho
- Department of Forestry and Wood Sciences, Federal University of Espírito Santo - UFES, Jerônimo Monteiro, ES 29550-000, Brazil
| | | | | | - Juliana Alves Resende
- Graduate Program in Veterinary Sciences, Center for Agricultural Sciences and Engineering - CCAE, Federal University of Espírito Santo - UFES, Alto Universitário, no number, Guararema, Alegre, ES 29500-000, Brazil; Department of Pharmacy and Nutrition, Federal University of Espírito Santo - UFES, Alegre, ES 29500-000, Brazil.
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Yan R, Ji Z, Fan J, Li J, Ren Y. Evaluation of the Efficacy of a Lactobacilli-Based Teat Detergents for the Microbiota of Cows Teats Using an Untargeted Metabolomics Approach. J Microbiol Biotechnol 2024; 34:103-115. [PMID: 37957117 PMCID: PMC10840472 DOI: 10.4014/jmb.2305.05016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/26/2023] [Accepted: 09/08/2023] [Indexed: 11/15/2023]
Abstract
Teat cleaning pre- and post-milking is important for the overall health and hygiene of dairy cows. The purpose of this research was to evaluate the effectiveness of a teat detergents based on lactic acid bacteria according to changes in somatic cell count and cow-milk metabolites. Sixty-nine raw milk samples were collected from 11 Holstein-Friesian cows in China during 12 days of teat cleaning. An ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry-based untargeted metabolomic approach was applied to detect metabolomic differences after treatment with lactic acid bacteria and chemical teat detergents in cows with subclinical mastitis. The results suggest that the lactobacilli-based teat detergents could reduce somatic cell count and improve microhabitat of cow teat apex by adjusting the composition of metabolites. Furthermore, the somatic cell count could be decreased significantly within 10 days following the cleaning protocol. Lactic acid bacteria have the potential to be applied as a substitution to teat chemical detergents before and after milking for maintenance of healthy teats and breasts. Further, larger scale validation work is required to support the findings of the current study.
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Affiliation(s)
- Rui Yan
- Inner Mongolia Key Laboratory for Biomass-Energy Conversion, Inner Mongolia University of Science and Technology, Baotou 014010, P.R. China
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, P.R. China
| | - Zhongqing Ji
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, P.R. China
| | - Jiaqi Fan
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, P.R. China
| | - Jiang Li
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, P.R. China
| | - Yan Ren
- Inner Mongolia Key Laboratory for Biomass-Energy Conversion, Inner Mongolia University of Science and Technology, Baotou 014010, P.R. China
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, P.R. China
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Menezes KV, Pimentel BMF, Da Costa JAC, Ferreira NS, Ignacchiti MDC, Resende JA. Virulence factors and antimicrobial resistance of Escherichia coli isolated from commercialized fresh cheese in the south of Espírito Santo. Braz J Microbiol 2023; 54:2063-2071. [PMID: 37261621 PMCID: PMC10484838 DOI: 10.1007/s42770-023-01013-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 05/23/2023] [Indexed: 06/02/2023] Open
Abstract
Cheeses are dairy products that can potentially contain a diverse range of harmful bacteria that could be consumed by humans, including the enteric pathogen Escherichia coli. This study aimed to characterize the presence of total coliforms, assess the antimicrobial susceptibility profiles of the main commercial antimicrobial classes and biocides, and evaluate the ability of 50 E. coli isolates obtained from fresh cheese sold in the southern region of Espírito Santo, Brazil, to produce biofilms. The counts of total coliforms + E. coli obtained averages of (A) 7.22 × 106 CFU/g, (B) 9.35 × 107 CFU/g, and (C) 1.16 × 106 CFU/g for different brands. All isolates were capable of forming biofilms, with 8%, 76%, and 16% of these isolates presenting high, moderate, and low adherence in biofilm formation, respectively. Most strains showed inhibition halos for the biocides chlorhexidine digluconate 2% (16 mm ± 4.34), iodopovidone 10% (7.14 mm ± 0.36), and sodium hypochlorite 2% (7.12 mm ± 0.33). Out of the 50 strains, 21 (42%) were resistant to at least one of the antimicrobials. Regarding the multiple resistance index, 3 (6%) strains were resistant to 3 or more antimicrobial classes. Furthermore, 2 (4%) were extended-spectrum beta-lactamases producers. Resistance to ampicillin and amoxicillin was observed in 20% and 40% of the strains, respectively. In contrast, gentamicin was the most effective antimicrobial, with a sensitivity rate of 100%. The findings indicate that E. coli present in fresh cheese may possess unique physiological characteristics that could be associated with their persistence, virulence, and multidrug resistance. These results raise significant public health concerns since contaminated food can pose risks to consumers' health, emphasizing the importance of reinforcing hygienic-sanitary controls at all stages of production.
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Affiliation(s)
- Kássia Vidal Menezes
- Graduate Program in Veterinary Sciences, Federal University of Espírito Santo (UFES), Alegre, ES, Brazil
| | - Bruna Maria Fia Pimentel
- Department of Pharmacy and Nutrition, Federal University of Espirito Santo (UFES), Alto Universitário; S/N, Alegre, ES, 29500-000, Brazil
| | - Joyce Aparecida Corrêa Da Costa
- Department of Pharmacy and Nutrition, Federal University of Espirito Santo (UFES), Alto Universitário; S/N, Alegre, ES, 29500-000, Brazil
| | - Nicolly Soares Ferreira
- Graduate Program in Veterinary Sciences, Federal University of Espírito Santo (UFES), Alegre, ES, Brazil
| | - Mariana Drummond Costa Ignacchiti
- Department of Pharmacy and Nutrition, Federal University of Espirito Santo (UFES), Alto Universitário; S/N, Alegre, ES, 29500-000, Brazil
| | - Juliana Alves Resende
- Graduate Program in Veterinary Sciences, Federal University of Espírito Santo (UFES), Alegre, ES, Brazil.
- Department of Pharmacy and Nutrition, Federal University of Espirito Santo (UFES), Alto Universitário; S/N, Alegre, ES, 29500-000, Brazil.
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Aiemsaard J, Borlace GN, Thongkham E, Jarassaeng C. Antibacterial efficacy of essential oil spray formulation for post-milking disinfection in dairy cows. Vet World 2023; 16:1552-1561. [PMID: 37621533 PMCID: PMC10446713 DOI: 10.14202/vetworld.2023.1552-1561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 06/15/2023] [Indexed: 08/26/2023] Open
Abstract
Background and Aim Mastitis is an essential issue in dairy cows. Post-milking teat dips can help reduce this problem, but they employ harsh disinfectants, and many bacteria are becoming increasingly tolerant. This study aimed to investigate the antibacterial activity of clove, citronella, and sweet basil essential oils against the common bovine mastitis causative agents Staphylococcus aureus, Streptococcus agalactiae, and Escherichia coli and to develop an antiseptic post-milking teat spray for use in dairy cows. Materials and Methods The in vitro antimicrobial activity of the essential oils was determined by broth microdilution and time-kill assays. Essential oil-based post-milking teat sprays were developed. The bacterial eradication efficacy of the formulations was determined by time-kill assays and their stability was tested by repeated freeze-thaw cycles. The most effective formulation was tested in dairy cows. Results The minimum inhibitory concentrations and minimum bactericidal concentrations of the tested essential oils against S. aureus, S. agalactiae, and E. coli were in the range of 0.78-6.25 μL/mL. The time-kill tests indicated that the essential oils' antibacterial activity depended on concentration and contact time. All three essential oil-based post-milking teat spray preparations showed good stability. The citronella spray formulation showed the highest antibacterial potency. In in vivo testing, the citronella spray eradicated aerobic bacteria on the teat skin of cows (99.9% or 3-log10 reduction) within 1 min, which was non-inferior to a standard 0.54% iodine solution teat dip. Conclusion Clove, citronella, and sweet basil essential oils were effective against S. aureus, S. agalactiae, and E. coli in vitro. Of these, citronella essential oil is the most promising to be developed as a post-milking teat spray with high antibacterial activity and excellent bacterial eradication properties in vivo.
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Affiliation(s)
- Jareerat Aiemsaard
- Division of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, 40002 Thailand
| | - Glenn Neville Borlace
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, 40002 Thailand
| | - Eakachai Thongkham
- Division of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, 40002 Thailand
| | - Chaiwat Jarassaeng
- Division of Theriogenology, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, 40002 Thailand
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