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Nonkuntod P, Senawong T, Soikum C, Chaveerach P, Watwiangkham A, Suthirakun S, Chaveerach U. Copper(II) Compounds of 4‐Nitrobenzoic Hydrazide with Different Anions (ClO4‐, NO3‐ and Br‐): Synthesis, Characterization, DFT calculations, DNA Interactions and Cytotoxic Properties. Chem Biodivers 2022; 19:e202100708. [DOI: 10.1002/cbdv.202100708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/18/2022] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Chaiyaporn Soikum
- Khon Kaen University Verterinary Public Health mittraphrap road 40002 Muang THAILAND
| | - Prapansak Chaveerach
- Khon Kaen University Veterinary Public Health mittraphrap road 40002 Muang THAILAND
| | - Athis Watwiangkham
- Suranaree University of Technology Chemistry Suranaree road Muang THAILAND
| | - Suwit Suthirakun
- Suranaree University of Technology Chemistry Suranaree road Muang THAILAND
| | - Unchulee Chaveerach
- Khon Kaen University Chemistry Mittraphrap roadNot Available 40002 Muang THAILAND
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Nonkuntod P, Meenongwa A, Senawong T, Soikum C, Chaveerach P, Watwiangkham A, Suthirakun S, Chaveerach U. Mixed-ligand copper( ii) complexes of guanidine derivatives containing ciprofloxacin: synthesis, characterization, DFT calculations, DNA interactions and biological activities. NEW J CHEM 2022. [DOI: 10.1039/d2nj01377k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two copper(ii) complexes of guanidine derivatives and ciprofloxacin are good candidates for the next generation of anticancer and/or antibacterial agents.
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Affiliation(s)
- Prangtip Nonkuntod
- Materials Chemistry Research Centre, Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Atittaya Meenongwa
- Health Science and Aesthetic Program, Department of Science, Faculty of Science and Technology, Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand
| | - Thanaset Senawong
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Chaiyaporn Soikum
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Prapansak Chaveerach
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Athis Watwiangkham
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Suwit Suthirakun
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Unchulee Chaveerach
- Materials Chemistry Research Centre, Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
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Meenongwa A, Brissos RF, Soikum C, Chaveerach P, Trongpanich Y, Chaveerach U. Enhancement of biological activities of copper(II) complexes containing guanidine derivatives by enrofloxacin. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130645] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Phomjareet S, Chaveerach P, Suksawat F, Jiang J, Richards AL. Spotted Fever Group Rickettsia Infection of Cats and Cat Fleas in Northeast Thailand. Vector Borne Zoonotic Dis 2020; 20:566-571. [PMID: 32744925 DOI: 10.1089/vbz.2019.2564] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Rickettsia species cause rickettsioses, which are zoonotic diseases found worldwide, and are transmitted by arthropods such as lice, fleas, ticks, and mites. In Thailand, flea infestations are common among cats and dogs. This study aimed at determining the exposure to spotted fever group rickettsiae (SFGR) of cats in surrounding areas of Rajabhat Maha Sarakham University, Muang district, Maha Sarakham province and rickettsial infection among cat fleas, Ctenocephalides felis, collected from dogs of the surrounding area of Waeng Noi district, Khon Kaen province. Forty-two cat sera were assessed for IgG antibody titers against SFGR by a group-specific enzyme-linked immunosorbent assay. The prevalence of seroreactive cats was 4.76% (2/42). DNA preparations from 23 individual cat fleas from three dogs were assessed by Rickettsia genus-specific, group-specific, and species-specific quantitative real-time PCR (qPCR) assays. Positive results were confirmed by ompB gene fragment sequencing. Twenty-one of 23 cat fleas were positive for Rickettsia asembonensis, and the other two DNA preparations were negative for rickettsial DNA. This study's finding indicates that companion cats and dogs in Northeast Thailand are exposed to SFGR and that exposure may be due to infection with R. asembonensis, an organism known to infect humans, monkeys, and dogs. Clinicians for humans and animals in Northeast Thailand should be aware of rickettsial infections among their patients.
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Affiliation(s)
- Sirirat Phomjareet
- Department of Veterinary Public Health and Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Prapansak Chaveerach
- Department of Veterinary Public Health and Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Fanan Suksawat
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Ju Jiang
- Rickettsial Diseases Research Program, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, Maryland, USA
| | - Allen L Richards
- Rickettsial Diseases Research Program, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, Maryland, USA.,Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.,International Visiting Scholar, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
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Prachantasena S, Charununtakorn P, Muangnoicharoen S, Hankla L, Techawal N, Chaveerach P, Tuitemwong P, Chokesajjawatee N, Williams N, Humphrey T, Luangtongkum T. Climatic factors and prevalence of Campylobacter in commercial broiler flocks in Thailand. Poult Sci 2017; 96:980-985. [PMID: 28339543 DOI: 10.3382/ps/pew364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 08/29/2016] [Indexed: 12/15/2022] Open
Abstract
Campylobacter are bacteria associated with human foodborne disease worldwide. Poultry and poultry products are generally considered as a main source of these organisms. Compared to temperate zones, baseline information on Campylobacter in tropical regions is limited. Thus, the objectives of the present study were 1) to determine the prevalence of Campylobacter in Thai broiler flocks and 2) to investigate the association between climatic factors (i.e., rainfall, ambient temperature, and relative humidity) and Campylobacter colonization status of broiler flocks in Thailand. A total of 442 commercial broiler flocks reared in the central and northeastern regions of Thailand during 2012 to 2014 were investigated. Campylobacter positive status was identified in 252 examined flocks (57.01%; 95% CI 52.39 to 61.63%). Prevalence of Campylobacter in the northeastern region (54.46%; 95% CI 44.76 to 63.83%) was slightly lower than that of the central region (57.77%; 95% CI 52.47 to 62.90%). More than 65% of Campylobacter positive flocks in the central and northeastern regions had within-flock prevalence higher than 75%. Generalized estimating equations (GEE) revealed that the increased rainfall and relative humidity were associated with the increase of Campylobacter colonization in broiler flocks (P ≤ 0.05), while no relationship between ambient temperature and Campylobacter colonization status was identified.
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Affiliation(s)
- S Prachantasena
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - P Charununtakorn
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - S Muangnoicharoen
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - L Hankla
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - N Techawal
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - P Chaveerach
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - P Tuitemwong
- Department of Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok, Thailand
| | - N Chokesajjawatee
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
| | - N Williams
- Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom
| | - T Humphrey
- School of Medicine, Swansea University, Singleton Park, Swansea, United Kingdom
| | - T Luangtongkum
- Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand.,Research Unit in Microbial Food Safety and Antimicrobial Resistance, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
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Jarriyawattanachaikul W, Chaveerach P, Chokesajjawatee N. Antimicrobial Activity of Thai-herbal Plants against Food-borne Pathogens E. Coli, S. Aureus and C. Jejuni. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.aaspro.2016.12.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Meenongwa A, Brissos RF, Soikum C, Chaveerach P, Gamez P, Trongpanich Y, Chaveerach U. Effects of N,N-heterocyclic ligands on the in vitro cytotoxicity and DNA interactions of copper(ii) chloride complexes from amidino-O-methylurea ligands. NEW J CHEM 2016. [DOI: 10.1039/c5nj03439f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four novel copper(ii) complexes based on guanidine derivatives have been synthesized by addition of N,N-heterocyclic ligands, and their interesting biological activities have been evaluated.
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Affiliation(s)
- Atittaya Meenongwa
- Materials Chemistry Research Center
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
| | - Rosa F. Brissos
- Departament de Química Inorgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Chaiyaporn Soikum
- Department of Veterinary Public Health
- Faculty of Veterinary Medicine
- Khon Kaen University
- Khon Kaen 40002
- Thailand
| | - Prapansak Chaveerach
- Department of Veterinary Public Health
- Faculty of Veterinary Medicine
- Khon Kaen University
- Khon Kaen 40002
- Thailand
| | - Patrick Gamez
- Departament de Química Inorgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)
| | - Yanee Trongpanich
- Department of Biochemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
- Thailand
| | - Unchulee Chaveerach
- Materials Chemistry Research Center
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
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Meenongwa A, Brissos RF, Soikum C, Chaveerach P, Gamez P, Trongpanich Y, Chaveerach U. DNA-interacting and biological properties of copper(ii) complexes from amidino-O-methylurea. NEW J CHEM 2015. [DOI: 10.1039/c4nj01377h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two copper(ii) complexes from the water-soluble amidino-O-methylureas exhibit interesting activities which are of paramount importance for biological applications.
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Affiliation(s)
- Atittaya Meenongwa
- Materials Chemistry Research Center
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
| | - Rosa F. Brissos
- Departament de Química Inorgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Chaiyaporn Soikum
- Department of Veterinary Public Health
- Faculty of Veterinary Medicine
- Khon Kaen University
- Khon Kaen 40002
- Thailand
| | - Prapansak Chaveerach
- Department of Veterinary Public Health
- Faculty of Veterinary Medicine
- Khon Kaen University
- Khon Kaen 40002
- Thailand
| | - Patrick Gamez
- Departament de Química Inorgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)
| | - Yanee Trongpanich
- Department of Biochemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
- Thailand
| | - Unchulee Chaveerach
- Materials Chemistry Research Center
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Khon Kaen University
- Khon Kaen 40002
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Pratumwieng R, Soikum C, Chaveerach P, Chaveerach U. Binding studies of ( N -(methylpyridin-2-yl)-amidino- O -methylurea)copper(II) complexes to four nitrogenous bases and 5′-GMP. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.08.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Sukon P, Waewdee P, Chaveerach P, Surachon P, Soikum C. Effect of a Single Dose of Lactobacillus salivarius on Prevention of Salmonella enteritidis Infection in Young Broilers. ACTA ACUST UNITED AC 2012. [DOI: 10.3923/javaa.2012.955.961] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Surachon P, Sukon P, Chaveerach P, Waewdee P, Soikum C. Screening of Lactic Acid Bacteria Isolated from Chicken Ceca for In vitro Growth Inhibition of Salmonella enteritica Serovar Enteritidis. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/javaa.2011.939.944] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Srisamoot N, Chaveerach A, Nuchadomrong S, Sattayasai N, Chaveerach P, Tanomtong A, Pinthong K. Genetic relationships among wild Felidae in Thailand using AFLP markers. Pak J Biol Sci 2009; 10:2639-45. [PMID: 19070075 DOI: 10.3923/pjbs.2007.2639.2645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The cytogenetics of eight Felidae species in Thailand were investigated by the colchicines-hypotonic fixation-air drying technique followed by a conventional technique. All species studied have an identical number of 38 diploid chromosomes, indicating a close genetic relationship among species. At a deep study level, the genetic relationships of eight Felidae species were accessed by the AFLP method. Blood samples were collected from sources locating in their original regions for DNA extraction. With ten successful primer combinations, a total of 4208 scorable bands were generated. Of these bands, 18.91% are polymorphic. Percentages of Polymorphic Bands (PPB) for each primer combination range from 15.00 to 23.59%. The generating bands were used for dendrogram construction. The average genetic similarity values among all Felidae species are 68.20% (between Panthera tigris and Neofelis nebulosa) to 85.53% (between Prionailurus bengalensis and Prionailurus viverrinus). The dendrogram shows that the eight Felidae species were clustered together and the subfamily Pantherinae and Felinae with Neofelis nebulosa are distinguished. The Felinae, Prionailurus bengalensis, Prionailurus viverrinus, Catopuma temminckii, Felis chaus, Pardofelis marmorata and Neofelis nebulosa were clustered together with 91% bootstrap support and the Pantherinae, Panthera pardus is clustered with Panthera tigris with 92% bootstrap support. In summary, the ten successful primer combinations can be used to determine genetic differences among eight Thailand Felidae species.
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Affiliation(s)
- Nattapong Srisamoot
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
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Chaveerach P, Lipman LJA, van Knapen F. Antagonistic activities of several bacteria on in vitro growth of 10 strains of Campylobacter jejuni/coli. Int J Food Microbiol 2004; 90:43-50. [PMID: 14672829 DOI: 10.1016/s0168-1605(03)00170-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chicken meat contaminated with Campylobacter jejuni can be the source of human enteritis. To decrease the risk of human infection, Campylobacter should be controlled at farm levels. Orally given probiotic bacteria could prevent colonisation of chicken with pathogenic bacteria like Campylobacter. The aim of this study was to investigate the effect of different bacteria on Campylobacter growth. Our results demonstrated that bacteria isolated from conventional chicken had potential inhibitory activities against Campylobacter. Other bacteria not isolated from chickens but with known antagonistic capacities, e.g. Enterococcus (56 strains) and Escherichia coli (20 strains), did not show any negative effect on Campylobacter. Interestingly, one Lactobacillus (P93) strain isolated from the chicken gut showed bactericidal activity against all tested Campylobacter. The bactericidal effect was characterised as the production of organic acids in combination with probably production of an anti-Campylobacter protein. In a co-culture study of Campylobacter and Lactobacillus (P93), the culturability of Campylobacter was under the detection limit after 48 h of incubation. A chicken experiment is needed to further evaluate the effect of the promising probiotic bacteria against Campylobacter colonisation in chicken.
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Affiliation(s)
- P Chaveerach
- Department of Veterinary Public Health and Food Safety, Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80 175, 3508 TD Utrecht, The Netherlands.
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Chaveerach P, Keuzenkamp DA, Lipman LJA, Van Knapen F. Effect of Organic Acids in Drinking Water for Young Broilers on Campylobacter Infection, Volatile Fatty Acid Production, Gut Microflora and Histological Cell Changes. Poult Sci 2004; 83:330-4. [PMID: 15049483 DOI: 10.1093/ps/83.3.330] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Water is a prominent vehicle for Campylobacter spread throughout a chicken flock. The aim of this study was to evaluate the effect of organic acids administered through the drinking water, as a decontamination method, on gut microflora and the development of lesions in the gastrointestinal tracts of young broilers inoculated with 2 different doses of Campylobacter. The results revealed that most of the chickens were infected with Campylobacter at the end of the experiment. The drinking water was free of Campylobacter throughout the study. No difference of volatile fatty acid levels between treatment and control groups was observed in the crop and cecal contents. In the cecal contents, the total aerobic bacteria numbers were significantly higher in the treatment groups compared with the control groups (P < 0.01 and P < 0.04, respectively). Moreover, no damaged epithelial cells were observed in the chicken gut due to consumption of acidified drinking water. Acidified drinking water could therefore play a crucial role in a biosecurity strategy of preventing Campylobacter spread via drinking water in broiler flocks.
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Affiliation(s)
- P Chaveerach
- Khon Kaen University, Department of Veterinary Public Health, Faculty of Veterinary Medicine, Khon Kaen, 40002 Thailand.
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Chaveerach P, ter Huurne AAHM, Lipman LJA, van Knapen F. Survival and resuscitation of ten strains of Campylobacter jejuni and Campylobacter coli under acid conditions. Appl Environ Microbiol 2003; 69:711-4. [PMID: 12514068 PMCID: PMC152468 DOI: 10.1128/aem.69.1.711-714.2003] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The culturability of 10 strains of Campylobacter jejuni and Campylobacter coli was studied after the bacteria were exposed to acid conditions for various periods of time. Campylobacter cells could not survive 2 h under acid conditions (formic acid at pH 4). The 10 Campylobacter strains could not be recovered, even when enrichment media were used. Viable cells, however, could be detected by a double-staining (5-cyano-2,3-ditolyl tetrazolium chloride [CTC]-4',6'-diamidino-2-phenylindole [DAPI]) technique, demonstrating that the treated bacteria changed into a viable but nonculturable (VBNC) form; the number of VBNC forms decreased over time. Moreover, some VBNC forms of Campylobacter could be successfully resuscitated in specific-free-pathogen fertilized eggs via two routes, amniotic and yolk sac injecting.
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Affiliation(s)
- P Chaveerach
- Department of Public Health and Food Safety, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
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Chaveerach P, Keuzenkamp DA, Urlings HAP, Lipman LJA, van Knapen F. In vitro study on the effect of organic acids on Campylobacter jejuni/coli populations in mixtures of water and feed. Poult Sci 2002; 81:621-8. [PMID: 12033410 DOI: 10.1093/ps/81.5.621] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Gastroenteritis caused by Campylobacter spp. infection has been recognized as one of the important public health problems in the developed countries. Outbreaks mostly originate from the consumption of contaminated poultry or infected water. The aim of this study was to determine the bactericidal activity on Campylobacter spp. of organic acids individually and in combinations at different pH levels and times and to compare bactericidal activities with activities of commercially available products. Ten strains of Campylobacter spp. were added in a mixture of water with commercial broiler feed, separately adjusted by four acids: formic, acetic, propionic, and hydrochloric acids, into pH 4.0, 4.5, 5.0, and 5.5. A combination of three organic acids was used in two different formulation ratios: formic:acetic:propionic at 1:2:3 and 1:2:5, at pH 4.0, 4.5, 5.0, and 5.5. All organic acids showed the strongest bactericidal effect on Campylobacter at pH 4.0. In contrast, at pH 5.0 and 5.5, the bactericidal activity of the four acids was low. The combination of organic acids showed a synergistic bactericidal activity at pH 4.5. Interestingly, the effect of the combined organic acids was stronger than the commercial products. Morphological cell changes were studied by transmission electron microscopy to determine the effect of the organic acids on the cell structure of Campylobacter. Some loss of outer membranes of the bacteria could be found in treated groups. Therefore, it can be concluded that organic acids, individually or in combination, have a strong bactericidal effect on Campylobacter spp. Routine application of organic acids to the water supply on poultry farms could prevent or diminish Campylobacter transmission.
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Affiliation(s)
- P Chaveerach
- Department of Science and Food of Animal Origin, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
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