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Clinical and Molecular Epidemiology of Drug-Resistant Bacteria Infections in Cattle...
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Clinical and Molecular Epidemiology of Drug-Resistant Bacteria Infections in Cattle Production Systems

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Cattle".

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 4240

Special Issue Editor

Dr. Joshua Aleri

E-Mail Website
Guest Editor
1. School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia
2. Centre for Animal Production and Health, Future Foods Institute, Murdoch University, Perth, WA 6150, Australia
Interests: bovine; mastitis; pneumonia; diarrhea; antimicrobial resistance

Special Issue Information

Dear Colleagues,

Antimicrobial use in livestock production systems is associated with the risk of antimicrobial resistance, thus posing a public health concern.

There is a need for continued antimicrobial surveillance and stewardship practices across different livestock production systems.

This Special Issue aims to highlight antimicrobial use patterns, antimicrobial resistance, and antimicrobial surveillance practices across bovine production systems.

For this Special Issue, original research articles and reviews are welcome. Research areas in beef and dairy production systems across the thematic areas antimicrobial use, antimicrobial resistance, surveillance, epidemiology and policy are highly welcomed.

We look forward to receiving your contributions.

Dr. Joshua Aleri
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bovine
  • antimicrobials
  • antimicrobial resistance
  • mastitis and milk quality
  • epidemiology
  • pneumonia
  • diarrhea
  • endometritis
  • lameness

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Published Papers (3 papers)

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Research

15 pages, 983 KiB  
Article
Characterization of Pseudomonas aeruginosa Isolated from Bovine Mastitis in Northern Jiangsu Province and Correlation to Drug Resistance and Biofilm Formability
by Yicai Huang, Pengqiang Chen, Hainan Cao, Zheng Zhou and Tianle Xu
Animals 2024, 14(22), 3290; https://doi.org/10.3390/ani14223290 - 15 Nov 2024
Viewed by 1087
Abstract
This study aimed to provide experimental support for the prevention and treatment of Pseudomonas aeruginosa infections and to elucidate the epidemiological distribution of resistance and virulence genes of Pseudomonas aeruginosa from mastitis in dairy cows in the northern part of Jiangsu Province and [...] Read more.
This study aimed to provide experimental support for the prevention and treatment of Pseudomonas aeruginosa infections and to elucidate the epidemiological distribution of resistance and virulence genes of Pseudomonas aeruginosa from mastitis in dairy cows in the northern part of Jiangsu Province and their relationship with the biofilm-forming ability of the strains. Mastitis presents a significant challenge within dairy farming, adversely impacting the health of dairy cows and precipitating substantial economic losses in milk production. In this study, Pseudomonas aeruginosa (PA) was isolated and identified from mastitis milk samples in Jiangsu Province, China. In order to characterize the isolates, multilocus sequence typing (MLST), drug resistance phenotypes, virulence genes, and biofilm formations were detected. The isolation and identification of pathogenic bacteria from 168 clinical mastitis milk samples using 16S rRNA and PCR revealed 63 strains of Pseudomonas aeruginosa, which were determined to be highly homologous according to phylogenetic tree analysis. In addition, the MLST indicated five major ST types, namely ST277, ST450, ST571, ST641, and ST463. The susceptibility to 10 antimicrobials was determined, and it was found that 63 strains of Pseudomonas aeruginosa did not have a strong resistance to the antimicrobials in general. However, there were differences in the phenotypes’ resistance to antimicrobials among the different ST types. It was also found that the more resistant the strains were to antimicrobials, the lower the carriage of virulence genes detected. The biofilm content was measured using the semi-quantitative crystal violet method. It was found that there were a few strains with medium or strong biofilm-forming abilities. However, the number of virulence genes carried by the 63 strains of Pseudomonas aeruginosa was inversely proportional to the biofilm-forming ability. It was also found that there were significantly more Pseudomonas aeruginosa in the biofilm state than in the planktonic state and that strains with strong biofilm-forming abilities were more resistant to antimicrobials. Full article
(This article belongs to the Special Issue Clinical and Molecular Epidemiology of Drug-Resistant Bacteria Infections in Cattle Production Systems)
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12 pages, 946 KiB  
Article
Assessment of Bacterial Contamination and Antimicrobial Resistance of Escherichia coli Isolates from Slovak Dairy Farms
by Nikola Dančová, Gabriela Gregová and Tatiana Szabóová
Animals 2024, 14(21), 3095; https://doi.org/10.3390/ani14213095 - 26 Oct 2024
Viewed by 1148
Abstract
The conditions in livestock housing are suitable for the survival of airborne microorganisms, mainly due to high temperatures, humidity, and the presence of organic material. The total count of airborne bacteria concentrations in cattle farms ranged from 3.01 log10 CFU/mL to 6.90 [...] Read more.
The conditions in livestock housing are suitable for the survival of airborne microorganisms, mainly due to high temperatures, humidity, and the presence of organic material. The total count of airborne bacteria concentrations in cattle farms ranged from 3.01 log10 CFU/mL to 6.90 log10 CFU/mL; for coliform bacteria, they were from 2.18 log10 CFU/mL to 3.34 log10 CFU/mL; and for molds, they ranged from 3.00 log10 CFU/mL to 4.57 log10 CFU/mL. Bacteria resistant to antimicrobial substances and resistance genes can be spread on animal farms. Antimicrobial resistance in ubiquitous Escherichia coli isolated from cattle feces was investigated. Minimum inhibitory concentration (MIC) testing was utilized to identify phenotypic resistance profiles, and the PCR method was employed to detect the presence of resistant genes. A higher percentage of resistance was found to amikacin (65%), tetracycline (61%), streptomycin (56%), ampicillin (55%), and nalidixic acid (45%). Multidrug resistance was determined in up to 64.3% of the isolates studied. The most widespread resistance genes were blaTEM (85.7%), sul2 (66.7%), tetB (52.38%), and sul1 (47.6%). We found that 4.8% of the E. coli isolates had the blaCMY gene. We found that, despite phenotypic resistance, E. coli isolates do not necessarily carry genes conferring resistance to that particular antimicrobial agent. Full article
(This article belongs to the Special Issue Clinical and Molecular Epidemiology of Drug-Resistant Bacteria Infections in Cattle Production Systems)
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14 pages, 1127 KiB  
Article
Distribution of Bovine Mastitis Pathogens in Quarter Milk Samples from Bavaria, Southern Germany, between 2014 and 2023—A Retrospective Study
by Verena Bechtold, Wolfram Petzl, Reglindis Huber-Schlenstedt and Ulrike S. Sorge
Animals 2024, 14(17), 2504; https://doi.org/10.3390/ani14172504 - 29 Aug 2024
Cited by 1 | Viewed by 1417
Abstract
The objective of this study was to investigate the distribution of mastitis pathogens in quarter milk samples (QMSs) submitted to the laboratory of the Bavarian Animal Health Service (TGD) between 2014 and 2023 in general, in relation to the clinical status of the [...] Read more.
The objective of this study was to investigate the distribution of mastitis pathogens in quarter milk samples (QMSs) submitted to the laboratory of the Bavarian Animal Health Service (TGD) between 2014 and 2023 in general, in relation to the clinical status of the quarters, and to analyze seasonal differences in the detection risk. Each QMS sent to the TGD during this period was analyzed and tested using the California Mastitis Test (CMT). Depending on the result, QMSs were classified as CMT-negative, subclinical, or clinical if the milk character showed abnormalities. Mastitis pathogens were detected in 19% of the QMSs. Non-aureus staphylococci (NAS) were the most common species isolated from the culture positive samples (30%), followed by Staphylococcus (S.) aureus (19%), Streptococcus (Sc.) uberis (19%), and Sc. dysgalactiae (9%). In culture-positive QMSs from CMT-negative and subclinically affected quarters, the most frequently isolated pathogens were NAS (44% and 27%, respectively), followed by S. aureus (25% and 17%, respectively) and Sc. uberis (8% and 22%, respectively). In QMSs from clinically affected quarters, the most frequently isolated pathogens were Sc. uberis (32%), S. aureus (13%), Sc. dysgalactiae (11%), and Escherichia (E.) coli (11%). The distribution of NAS and Sc. uberis increased throughout the study period, while that of S. aureus decreased. From June to October, QMSs from subclinically affected quarters increased and environmental pathogens, such as Sc. uberis, were detected more frequently. In conclusion, this study highlights the dynamic nature of the distribution of mastitis pathogens, influenced by mastitis status and seasonal factors. Environmental pathogens still play an important role, especially in clinical mastitis and seasonal dependency, with the number of positive samples continuing to increase. It is therefore essential to continue mastitis control measures and to regularly monitor the spread of mastitis pathogens in order to track trends and adapt targeted prevention measures. Full article
(This article belongs to the Special Issue Clinical and Molecular Epidemiology of Drug-Resistant Bacteria Infections in Cattle Production Systems)
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