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Journals
Microorganisms
Special Issues
Bacteria of Animal Origin with Public Health Implications
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Bacteria of Animal Origin with Public Health Implications

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Public Health Microbiology".

Deadline for manuscript submissions: closed (1 October 2023) | Viewed by 1956

Special Issue Editor

Dr. Raghavendra Amachawadi

E-Mail Website
Guest Editor
Department Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, USA
Interests: antimicrobial resistance; antibiotic alternatives in food animal agriculture; food animal therapeutics; antimicrobial stewardship; liver abscesses in feedlot cattle

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the public health disease caused by bacteria of animal origin, which could be considered a vast scientific field, although nowadays new and relevant aspects are emerging in the diseases along the interface of the human–animal environment. Bacteria of animal origin are changing their transmission patterns or extending their geographical areas, due to changes of climatic conditions, human-induced environmental changes, the globalisation of animal and goods trade, or the increase of human migrations and travellers. In addition, environmental changes in forests are more frequently exposing humans and domestic animals to infectious diseases with wild reservoirs. In recent years, several studies have been conducted that have attempted to identify the main drivers of infection and clarify the most important risk factors influencing the emergence, transmission, and spread of new and (re)-emergent public health diseases. Today, the need to outline the knowledge and future challenges in this field is urgent. With this general aim, this Special Issue wants to provide current knowledge on the epidemiological patterns and the changes we have recently observed for public health disease.

Dr. Raghavendra Amachawadi
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. Microorganisms is an international peer-reviewed open access monthly 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 2700 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

  • bacteria of animal origin
  • public health
  • infectious diseases

Published Papers (1 paper)

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Research

12 pages, 310 KiB  
Article
Impact of In-Feed versus In-Water Chlortetracycline and Tiamulin Administrations on Fecal Prevalence and Antimicrobial Susceptibilities of Campylobacter in a Population of Nursery Pigs
by Victor L. Ishengoma, Raghavendra G. Amachawadi, Mike D. Tokach, Xiaorong Shi, Qing Kang, Robert D. Goodband, Joel DeRouchey, Jason Woodworth and Tiruvoor G. Nagaraja
Microorganisms 2023, 11(12), 2876; https://doi.org/10.3390/microorganisms11122876 - 28 Nov 2023
Viewed by 1011
Abstract
Antimicrobial resistance (AMR) in bacteria is a major public health concern in the US and around the world. Campylobacter is an important foodborne pathogen that resides in the gut of pigs and is shed in feces, with the potential to be transmitted to [...] Read more.
Antimicrobial resistance (AMR) in bacteria is a major public health concern in the US and around the world. Campylobacter is an important foodborne pathogen that resides in the gut of pigs and is shed in feces, with the potential to be transmitted to humans. In pigs, the oral route, either in-feed or in-water, is by far the most common route of administration of antimicrobials. Because the distribution of the antibiotic in the gut and the dosages are different, the impact of in-feed vs. in-water administration of antibiotics on the development of AMR is likely to be different. Therefore, a study was conducted to compare in-feed vs. in-water administrations of chlortetracycline (CTC) and/or tiamulin on fecal prevalence and AMR profiles of Campylobacter among weaned nursery piglets. A total of 1,296 weaned piglets, allocated into 48 pens (27 piglets per pen), were assigned randomly to six treatment groups: Control (no antibiotic), in-feed CTC, in-water CTC, in-feed tiamulin, in-water tiamulin, or in-feed CTC and tiamulin. Fecal samples were collected randomly from 5 piglets from each pen during the pre-treatment (days 0, 7), treatment (days 14, 21), and post-treatment (days 28, 35) phases. Bacterial isolations and species identifications were conducted by culture and PCR, respectively. The microbroth dilution method with SensititreTM plates was used to determine the antimicrobial susceptibility and resistance of Campylobacter isolates. The results on resistance were interpreted based on the European Committee on Antimicrobial Susceptibility Testing (EUCAST) epidemiological cutoff values for Campylobacter. The overall prevalence of Campylobacter was 18.2% (262/1440). Speciation of Campylobacter isolates by PCR indicated the prevalence of only two species: Campylobacter hyointestinalis (17.9%; 258/1440) and C. coli (0.3%; 4/1440). Campylobacter isolates were resistant to tetracycline (98.5%), ciprofloxacin (89.3%), and nalidixic acid (60.3%). Neither the antibiotic nor the route of administration had an effect (p > 0.05) on the prevalence of AMR Campylobacter in the feces of piglets. Full article
(This article belongs to the Special Issue Bacteria of Animal Origin with Public Health Implications)
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