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1. Rapid differentiation of antibiotic-susceptible and -resistant bacteria through mediated extracellular electron transfer

Author:
Douglas R. Call,   et al.   ; Gretchen Tibbits; Abdelrhman Mohamed; Haluk Beyenal;     Show all 4 Authors
Source:
Biosensors & bioelectronics 2022 v.197 pp. 113754
ISSN:
0956-5663
Subject:
Acinetobacter baumannii; Escherichia coli; Klebsiella pneumoniae; Staphylococcus aureus; agar; antibiotic resistance; bacterial culture; bacterial growth; biosensors; cell respiration; ciprofloxacin; cross infection; electrochemistry; electron transfer; glassy carbon electrode; imipenem; liquids; oxacillin; population growth; tobramycin
Abstract:
... Conventional methods for testing antibiotic susceptibility rely on bacterial growth on agar plates (diffusion assays) or in liquid culture (microdilution assays). These time-consuming assays use population growth as a proxy for cellular respiration. Herein we propose to use mediated extracellular electron transfer as a rapid and direct method to classify antibiotic-susceptible and -resistant bacte ...
DOI:
10.1016/j.bios.2021.113754

2. On-farm soil resistome is modified after treating dairy calves with the antibiotic florfenicol

Author:
Douglas R. Call,   et al.   ; Jinxin Liu; Feng Yu; David A. Mills; Anyun Zhang; Zhe Zhao;     Show all 6 Authors
Source:
Science of the total environment 2021 v.750 pp. 141694
ISSN:
0048-9697
Subject:
aminoglycosides; antibiotic resistance; antibiotic resistance genes; beta-lactams; environment; florfenicol; intestinal microorganisms; quantitative polymerase chain reaction; soil; soil microorganisms
Abstract:
... We determined the immediate impact of exposure to antibiotic-treated animals on housing soil microbiome and resistome. Fecal (n = 36) and soil (n = 108) samples from dairy calves (n = 6) treated with and without florfenicol over 30 days were collected. There were temporary changes in the gut microbiome of antibiotic-treated calves as measured by Shannon diversity (16S rRNA gene sequencing; P = 0.0 ...
DOI:
10.1016/j.scitotenv.2020.141694

3. Lactic microbiota of the minas artisanal cheese produced in the serro region, Minas Gerais, Brazil

Author:
Douglas R. Call,   et al.   ; Luís Augusto Nero; Milimani Andretta; Thaiza T. Almeida; Leticia R. Ferreira; Anderson C. Camargo; Ricardo S. Yamatogi; Antonio F. Carvalho;     Show all 8 Authors
Source:
Lebensmittel-Wissenschaft + Technologie 2021 v.148 pp. 111698
ISSN:
0023-6438
Subject:
Acinetobacter johnsonii; Enterococcus; Lactobacillus; Lactococcus lactis; Streptococcus salivarius; artisan cheese; farm size; lactic acid; species diversity; starter cultures; Brazil
Abstract:
... The lactic microbiota of the Minas artisanal cheese (MAC) produced in the Serro region was characterized by culture-dependent and -independent methods. Samples of Serro MAC (n = 55) were obtained and plated for lactic acid bacteria (LAB) enumeration. Isolates (n = 176) were subsequently identified by 16S rRNA sequencing as lactobacilli, Lactococcus lactis and Enterococcus sp. LAB counts and the di ...
DOI:
10.1016/j.lwt.2021.111698

4. Spatial relationships between small-holder farms coupled with livestock management practices are correlated with the distribution of antibiotic resistant bacteria in northern Tanzania

Author:
Douglas R. Call,   et al.   ; Leah Rosenkrantz; Ofer Amram; Mark A. Caudell; Nadine Schuurman;     Show all 5 Authors
Source:
One health 2019 v.8 pp. 100097
ISSN:
2352-7714
Subject:
antibiotic resistance; antibiotics; burden of disease; coliform bacteria; livestock; livestock husbandry; markets; multiple drug resistance; odds ratio; regression analysis; vaccination; villages; Tanzania
Abstract:
... We examined the spatial distribution of antibiotic-resistant coliform bacteria amongst livestock from three distinct cultural groups, where group-level differences in practices (e.g., antibiotic use) may influence the magnitude of antibiotic resistance, while livestock interactions (e.g., mixing herds, shared markets) between these locations may reduce heterogeneity in the distribution of antibiot ...
DOI:
10.1016/j.onehlt.2019.100097

5. Growth of ‘Candidatus Liberibacter asiaticus’ in a host-free microbial culture is associated with microbial community composition

Author:
Douglas R. Call,   et al.   ; Banafsheh Molki; Phuc T. Ha; Anders Omsland; David R. Gang; Stephen R. Lindemann; Nabil Killiny; Haluk Beyenal;     Show all 8 Authors
Source:
Enzyme and microbial technology 2020 v.142 pp. 109691
ISSN:
0141-0229
Subject:
Bacillus cereus; Candidatus Liberibacter asiaticus; Citrus; Diaphorina citri; Pseudomonadaceae; axenic culture; community structure; detection limit; enzymes; microbial communities; microbial culture; polymyxin B; streptomycin; technology; vancomycin
Abstract:
... 'Candidatus Liberibacter asiaticus' ('Ca. L. asiaticus'), the suspected causative agent of citrus greening disease, is one of many phloem-restricted plant pathogens that have not been isolated and grown in an axenic culture. In this study, infected Asian citrus psyllids were used to prepare a host-free source of 'Ca. L. asiaticus'. Host-free mixed microbial cultures of 'Ca. L. asiaticus' were grow ...
DOI:
10.1016/j.enzmictec.2020.109691

6. Exposure to ambient air causes degradation and decreased in vitro potency of buparvaquone and parvaquone

Author:
Douglas R. Call,   et al.   ; Siddra A. Hines; Jacob Brandvold; Robert H. Mealey; Telmo Graça;     Show all 5 Authors
Source:
Veterinary parasitology: X 2020 v.277 pp. 100023
ISSN:
0304-4017
Subject:
Theileria annulata; Theileria equi; Theileria parva; animal welfare; buparvaquone; drug resistance; environmental factors; farmers; financial economics; headspace analysis; livestock; parasites; temperature; tropics; ultraviolet radiation
Abstract:
... Buparvaquone and parvaquone are hydroxynaphthoquinone compounds commonly used to treat livestock infected with Theileria species such as T. parva and T. annulata. In many (sub)tropical regions, chromatic changes in medicines can result from extreme environmental conditions and improper drug storage or handling, raising the possibility of drug degradation and loss of potency. We evaluated the effec ...
DOI:
10.1016/j.vpoa.2020.100023
CHORUS:
10.1016/j.vpoa.2020.100023

7. β-lactam resistance genes in bacteriophage and bacterial DNA from wastewater, river water, and irrigation water in Washington State

Author:
Douglas R. Call,   et al.   ; Anyun Zhang; Thomas E. Besser; Jinxin Liu; Lisa Jones; Hongning Wang; Margaret A. Davis;     Show all 7 Authors
Source:
Water research 2019 v.161 pp. 335-340
ISSN:
0043-1354
Subject:
DNA; antibiotic resistance; antibiotic resistance genes; bacteriophages; beta-lactamase; capsid; carbapenems; irrigation canals; irrigation water; municipal wastewater; polymerase chain reaction; river water; rivers; wastewater treatment; Washington (state)
Abstract:
... Our objective was to determine whether β-lactamase genes are carried within bacteriophage capsids, as a first step towards exploring the possible role of bacteriophages as vehicles for dispersal of antimicrobial resistance genes through an agricultural region of Washington State. Water samples (n = 178) from municipal wastewater treatment plants, river and irrigation canals were collected over a p ...
DOI:
10.1016/j.watres.2019.06.026
CHORUS:
10.1016/j.watres.2019.06.026

8. Relationships between livestock grazing practices, disease risk, and antimicrobial use among East African Agropastoralists

Author:
Douglas R. Call,   et al.   ; Haseeb Ahmed; Robert J. Quinlan; Jonathan K. Yoder;     Show all 4 Authors
Source:
Environment and development economics 2018 v.23 no.1 pp. 80-97
ISSN:
1469-4395
Subject:
agropastoralism; animal diseases; antibiotic resistance; disease prevention; disease transmission; grazing; households; infectious diseases; livestock; risk perception; theoretical models; Tanzania
Abstract:
... Livestock health is economically important for agropastoral households whose wealth is held partly as livestock. Households can invest in disease prevention and treatment, but livestock disease risk is also affected by grazing practices that result in inter-herd contact and disease transmission in regions with endemic communicable diseases. This paper examines the relationships between communal gr ...
DOI:
10.1017/S1355770X17000341

9. Medicinal foods and beverages among Maasai agro-pastoralists in northern Tanzania

Author:
Douglas R. Call,   et al.   ; Casey J. Roulette; Efrem-Fred A. Njau; Marsha B. Quinlan; Robert J. Quinlan;     Show all 5 Authors
Source:
Journal of ethnopharmacology 2018 v.216 pp. 191-202
ISSN:
0378-8741
Subject:
additives; agropastoralism; anti-infective agents; antimicrobial properties; beverages; females; functional foods; gender differences; herbal tea; interviews; lactation; men; plant collections; pregnancy; soups; surveys; traditional medicine; wild plants; women; Tanzania
Abstract:
... Pastoralist Maasai populations of east Africa use several different wild plants as dietary and medicinal additives in beverages (soups and teas), yet little is known about how the plants used and the rationales for use compare and contrast across different Maasai beverages, including how gender specific dietary and health concerns structure patterns of intake.We investigated three Maasai beverages ...
DOI:
10.1016/j.jep.2018.01.022

10. Dairy farm soil presents distinct microbiota and varied prevalence of antibiotic resistance across housing areas

Author:
Douglas R. Call,   et al.   ; Jinxin Liu; Zhe Zhao; Johannetsy J. Avillan; Margaret Davis; William M. Sischo; Anyun Zhang;     Show all 7 Authors
Source:
Environmental pollution 2019 v.254 no.Pt B. pp. -
ISSN:
0269-7491
Subject:
Escherichia coli; agricultural soils; antibiotic resistance; antibiotic resistance genes; antibiotics; dairies; dairy calves; dairy farming; farms; feces; heifers; hospitals; lactation; microbiome; microorganisms; polymerase chain reaction; pulsed-field gel electrophoresis; ribosomal RNA; risk; sequence analysis; soil sampling; variance; Washington (state)
Abstract:
... Dairy cattle of different ages experience different living conditions and varied frequency of antibiotic administration that likely influence the distribution of microbiome and resistome in ways that reflect different risks of microbial transmission. To assess the degree of variance in these distributions, fecal and soil samples were collected from six distinct housing areas on commercial dairy fa ...
Handle:
10113/6570171
DOI:
10.1016/j.envpol.2019.113058
CHORUS:
10.1016/j.envpol.2019.113058

11. Narrative risk messages increase uptake and sharing of health interventions in a hard-to-reach population: A pilot study to promote milk safety among Maasai pastoralists in Tanzania

Author:
Douglas R. Call,   et al.   ; Mark A. Caudell; P. Victor Charoonsophonsak; Annalise Miller; Beatus Lyimo; Murugan Subbiah; Joram Buza;     Show all 7 Authors
Source:
Pastoralism 2019 v.9 no.1 pp. 7
ISSN:
2041-7136
Subject:
attitudes and opinions; boiling; health information; households; hygiene; milk; milk quality; pasteurization; pastoralism; pathogens; plate count; thermometers; villages; Tanzania
Abstract:
... Across pastoralist groups, dairy products often fulfill major nutritional, economic, and socio-cultural functions. These contributions are jeopardized by poor milk quality with studies among pastoralist groups showing dairy products can harbour a long list of pathogens. These potential risks underscore the need for more effective dairy hygiene interventions. Here, we determine how health messages ...
DOI:
10.1186/s13570-019-0142-z

12. Not All Antibiotic Use Practices in Food-Animal Agriculture Afford the Same Risk

Author:
Douglas R. Call,   et al.   ; Murugan Subbiah; Shannon M. Mitchell;     Show all 3 Authors
Source:
Journal of environmental quality 2016 v.45 no.2 pp. 618-629
ISSN:
0047-2425
Subject:
Campylobacter; Enterococcus; Escherichia coli; Salmonella enterica; animals; antibiotic residues; at-risk population; bacteria; bioavailability; cephalosporins; dose response; flora; florfenicol; fluoroquinolones; macrolides; oral administration; people; risk; soil; tetracycline; zoonoses
Abstract:
... The World Health Organization has identified quinolones, third- and fourth-generation cephalosporins, and macrolides as the most important antibiotics in human medicine. In the context of agricultural use of antibiotics, the principle zoonotic agents of concern are Salmonella enterica, Campylobacter spp., Escherichia coli, and Enterococcus spp. Antibiotic exposure provides a selective advantage to ...
DOI:
10.2134/jeq2015.06.0297

13. Medical pluralism and livestock health: ethnomedical and biomedical veterinary knowledge among East African agropastoralists

Author:
Douglas R. Call,   et al.   ; Mark A. Caudell; Marsha B. Quinlan; Robert J. Quinlan;     Show all 4 Authors
Source:
Journal of ethnobiology and ethnomedicine 2017 v.13 no.1 pp. 7
ISSN:
1746-4269
Subject:
agropastoralism; community health; disease outbreaks; food security; gender; herbal medicines; herd size; households; human health; livestock; medicine; models; multicultural diversity; research projects; social environment; zoonoses; Ethiopia; Tanzania
Abstract:
... BACKGROUND: Human and animal health are deeply intertwined in livestock dependent areas. Livestock health contributes to food security and can influence human health through the transmission of zoonotic diseases. In low-income countries diagnosis and treatment of livestock diseases is often carried out by household members who draw upon both ethnoveterinary medicine (EVM) and contemporary veterina ...
DOI:
10.1186/s13002-017-0135-1
PubMed:
28109305
PubMed Central:
PMC5251319

14. Whole‐genome sequencing reveals Listeria monocytogenes diversity and allows identification of long‐term persistent strains in Brazil

Author:
Douglas R. Call,   et al.   ; Anderson C. Camargo; Alexandra Moura; Johannetsy Avillan; Nicole Herman; Adelle P. McFarland; Srinand Sreevatsan; Joshua J. Woodward; Marc Lecuit; Luís A. Nero;     Show all 10 Authors
Source:
Environmental microbiology 2019 v.21 no.12 pp. 4478-4487
ISSN:
1462-2912
Subject:
Listeria monocytogenes; biodiversity; food pathogens; genetic variation; multilocus sequence typing; mutation; pathogenicity islands; population structure; stop codon; virulence; Brazil; Europe; North America
Abstract:
... Advances in whole‐genome sequencing (WGS) technologies have documented genetic diversity and epidemiology of the major foodborne pathogen Listeria monocytogenes (Lm) in Europe and North America, but data concerning South America are scarce. Here, we examined the population structure and genetic diversity of this major foodborne pathogen collected in Brazil. Based on core genome multilocus sequence ...
DOI:
10.1111/1462-2920.14726

15. Isolation of an IncP-1 plasmid harbouring mcr-1 from a chicken isolate of Citrobacter braakii in China

Author:
Douglas R. Call,   et al.   ; Jinxin Liu; Yanxian Yang; Yunxia Li; Dan Liu; Hongmei Tuo; Hongning Wang; Margaret Davis; Anyun Zhang;     Show all 9 Authors
Source:
International journal of antimicrobial agents 2018 v.51 no.6 pp. 936-940
ISSN:
0924-8579
Subject:
Citrobacter braakii; Escherichia coli; antibiotic resistance genes; chickens; colistin; flora; minimum inhibitory concentration; multiple drug resistance; phenotype; plasmids; polymerase chain reaction; sequence analysis; China
Abstract:
... The plasmid-mediated colistin resistance gene mcr-1 has been found worldwide, but the diversity of organisms harbouring this gene is unknown. In this study, 12 colistin-resistant Citrobacter spp. isolates were obtained from diseased or dead chickens in China, and PCR analysis indicated that five were positive for mcr-1. One Citrobacter braakii strain (SCC4) with a multidrug-resistant phenotype was ...
DOI:
10.1016/j.ijantimicag.2017.12.030

16. Responses of Acinetobacter baumannii Bound and Loose Extracellular Polymeric Substances to Hyperosmotic Agents Combined with or without Tobramycin: An Atomic Force Microscopy Study

Author:
Douglas R. Call,   et al.   ; Muhammedin Deliorman; F. Pinar Gordesli Duatepe; Emily K. Davenport; Boel A. Fransson; Haluk Beyenal; Nehal I. Abu-Lail;     Show all 7 Authors
Source:
Langmuir 2019 v.35 no.27 pp. 9071-9083
ISSN:
1520-5827
Subject:
Acinetobacter baumannii; adhesion; atomic force microscopy; bacteria; biofilm; biopolymers; dose response; maltodextrins; multiple drug resistance; nutrients; silicon nitride; sodium chloride; tobramycin
Abstract:
... In this work, contributions of extracellular polymeric substances (EPS) to the nanoscale mechanisms through which the multidrug-resistant Acinetobacter baumannii responds to antimicrobial and hyperosmotic treatments were investigated by atomic force microscopy. Specifically, the adhesion strengths to a control surface of silicon nitride (Si₃N₄) and the lengths of bacterial surface biopolymers of b ...
DOI:
10.1021/acs.langmuir.9b01227

17. Children's Ethnobiological Notions of Contamination and Contagions among Maasai Agro-Pastoralists of Northern Tanzania

Author:
Douglas R. Call,   et al.   ; Jennifer W. Roulette; Casey J. Roulette; Robert J. Quinlan; Barry S. Hewlett; Mark A. Caudell; Marsha B. Quinlan;     Show all 7 Authors
Source:
Journal of ethnobiology 2018 v.38 no.2 pp. 261-275
ISSN:
2162-4496
Subject:
Diptera; adults; agropastoralism; cough; educational institutions; empirical research; humans; interviews; microorganisms; models; ontogeny; risk; saliva; school children; wind; Tanzania
Abstract:
... Humans and other living organisms harbor disease-causing pathogenic microorganisms. These microorganisms are often transmitted through physical contact with contaminated objects, such as food, water, or other people. While some theoretical and empirical research examines the ontogeny of contamination and contagion beliefs, cross-cultural research on this topic is limited. To help remedy this pauci ...
DOI:
10.2993/0278-0771-38.2.261

18. Soil‐borne reservoirs of antibiotic‐resistant bacteria are established following therapeutic treatment of dairy calves

Author:
Douglas R. Call,   et al.   ; Jinxin Liu; Zhe Zhao; Lisa Orfe; Murugan Subbiah;     Show all 5 Authors
Source:
Environmental microbiology 2016 v.18 no.2 pp. 557-564
ISSN:
1462-2912
Subject:
Escherichia coli; antibiotic resistance; bacteria; ceftiofur; dairy calves; feces; florfenicol; soil
Abstract:
... We determined if antibiotics residues that are excreted from treated animals can contribute to persistence of resistant bacteria in agricultural environments. Administration of ceftiofur, a third‐generation cephalosporin, resulted in a ∼ 3 log increase in ceftiofur‐resistant Escherichia coli found in the faeces and pen soils by day 10 (P = 0.005). This resistant population quickly subsided in faec ...
DOI:
10.1111/1462-2920.13097

19. Investigation of the Link between Broodstock Infection, Vertical Transmission, and Prevalence of Flavobacterium psychrophilum in Eggs and Progeny of Rainbow Trout and Coho Salmon

Author:
Douglas R. Call,   et al.   ; Amy Long; Kenneth D. Cain;     Show all 3 Authors
Source:
Journal of aquatic animal health 2014 v.26 no.2 pp. 66-77
ISSN:
1548-8667
Subject:
Flavobacterium psychrophilum; Oncorhynchus kisutch; Oncorhynchus mykiss; absorbance; aquaculture; bacteria; bacterial cold-water disease; breeding stock; developmental stages; disease control; eggs; enzyme-linked immunosorbent assay; etiological agents; females; fish; kidneys; polymerase chain reaction; progeny; screening
Abstract:
... The etiological agent of bacterial coldwater disease (BCWD), Flavobacterium psychrophilum , can be transmitted both vertically and horizontally. Outbreaks of BCWD can result in significant losses in salmonid aquaculture. Reduction of outbreaks in fry may be possible through implementation of a management strategy in which progeny of heavily infected broodstock are culled from the general populatio ...
DOI:
10.1080/08997659.2014.886632

20. Load and Prevalence of Antimicrobial-Resistant Escherichia coli from Fresh Goat Meat in Arusha, Tanzania

Author:
Douglas R. Call,   et al.   ; Gaspary Mwanyika; Benardether Rugumisa; Catherine Luanda; Rehema Murutu; Murugan Subbiah; Joram Buza;     Show all 7 Authors
Source:
Journal of food protection 2016 v.79 no.9 pp. 1635-1641
ISSN:
0362-028X
Subject:
Escherichia coli; agar; amoxicillin; antibiotic resistance; bacteria; cross-sectional studies; drugs; experimental design; goat meat; hygiene; livestock and meat industry; public health; risk; slaughter; slaughterhouses; tetracycline; Tanzania
Abstract:
... Given the potential public health risks associated with a burgeoning goat meat industry in Tanzania, we estimated the load of Escherichia coli and the prevalence of antibiotic-resistant strains for goat meat by using a cross-sectional study design (June to July 2015). Five large (n = 60 samples) and five small (n = 64 samples) slaughterhouses were sampled over a period of four to six visits each. ...
DOI:
10.4315/0362-028X.JFP-15-573