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Kapetanović D, Katouli M, Lušić DV. Microbial Communities in Changing Aquatic Environments. Microorganisms 2024; 12:726. [PMID: 38674670 PMCID: PMC11051731 DOI: 10.3390/microorganisms12040726] [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] [Received: 03/03/2024] [Revised: 03/22/2024] [Accepted: 03/29/2024] [Indexed: 04/28/2024] Open
Abstract
The quality of aquatic ecosystems is an important public health concern [...].
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Affiliation(s)
| | - Mohammad Katouli
- Centre for Genecology, School of Health and Sport Sciences, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia;
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Wright L, Nouioui I, Mast Y, Bunk B, Spröer C, Neumann-Schaal M, Wolf J, Katouli M, Kurtböke Dİ. Nocardia australiensis sp. nov. and Nocardia spumae sp. nov., isolated from sea foam in Queensland, Australia. Int J Syst Evol Microbiol 2023; 73. [PMID: 37540199 DOI: 10.1099/ijsem.0.005952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023] Open
Abstract
Strains USC-21046T and USC-21048T were isolated from foaming coastal marine waters on the Sunshine Coast, Queensland, Australia. Both strains displayed growth and morphological characteristics typical for members belonging to the genus Nocardia. The major polar lipids were diphosphatidylglycerol and phosphatidylethanolamine, and the major fatty acids were C16 : 0, C18 : 1 ω9c, C18 : 0 and C18 : 0 10-methyl. The mycolic acids of strains USC-21046T and USC-21048T consisted of chain lengths between 50-64 and 56-68, respectively. Moreover, both of those strains contained meso-diaminopimelic acid and ribose, arabinose, glucose and galactose as whole cell sugars. Based on the phylogenomic results, both strains belonged to the genus Nocardia with strain USC-21046T showing an 80.4 % genome similarity to N. vinacea NBRC 16497T and N. pseudovaccinii NBRC 100343T, whereas USC-21048T strain showed an 83.6 % genome similarity to N. aobensis NBRC 100429T. Both strains were delineated from their closely related relatives based on physiological (e.g. growth on sole carbon source) and chemotaxonomic (e.g. cellular fatty composition) differences. The digital DNA-DNA hybridization (dDDH) values between USC-21046T and USC-21048T and their closely related relatives were below the dDDH threshold value of ≤70 % used for the taxonomic classification of novel species status. The genome length of strains USC-21046T and USC-21048T were 6 878 863 and 7 066 978 bp, with G+C contents of 65.2 and 67.8 mol%, respectively. For the novel isolates, we propose the names Nocardia australiensis sp. nov. with the type strain USC-21046T (=DSM 111727T=NCCB 100867T) and Nocardia spumae sp. nov. with the type strain USC-21048T (=DSM 111726T=NCCB 100868T).
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Affiliation(s)
- Luke Wright
- University of the Sunshine Coast (UniSC), 90 Sippy Downs Dr, Sippy Downs, QLD 4556, Australia
| | - Imen Nouioui
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Yvonne Mast
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Boyke Bunk
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Cathrin Spröer
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Meina Neumann-Schaal
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Jacqueline Wolf
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Mohammad Katouli
- University of the Sunshine Coast (UniSC), 90 Sippy Downs Dr, Sippy Downs, QLD 4556, Australia
| | - D İpek Kurtböke
- University of the Sunshine Coast (UniSC), 90 Sippy Downs Dr, Sippy Downs, QLD 4556, Australia
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Qasemi A, Rahimi F, Katouli M. Clonal groups of extended-spectrum β-lactamase and biofilm producing uropathogenic Escherichia coli in Iran. Pathog Glob Health 2022; 116:485-497. [PMID: 34904540 PMCID: PMC9639551 DOI: 10.1080/20477724.2021.2011578] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 12/16/2022] Open
Abstract
Pathogenicity of a bacterium is affected by the social characteristics of the population and environmental factors. The ability of biofilm formation among β-lactamase-producing uropathogenic Escherichia coli (UPEC) could facilitate the exchange of antibiotic-resistance genes, which resulted in widespread dissemination of antibacterial drug resistance. We investigated the prevalence of biofilm and β-lactamase producing UPECs among patients with urinary tract infection (UTI) in two cities with different demographics and climates in Iran. A total of 265 E. coli was isolated from patients with UTIs from two referral hospitals (n = 191) and two outpatient clinics (n = 74) in Isfahan and Zahedan, Iran. Production of curli and cellulose, and, biofilm formation was investigated using Congo red agar and microtiter plate methods, respectively. Biofilm producing (BFP) isolates (n = 107) were further characterized using rep-PCR, antimicrobial susceptibility testing and extended-spectrum β-lactamase (ESBL)/AmpC phenotypic production. Isolates were also screened for the presence of carbapenemase, ESBL and AmpC genes using multiplex PCR. High diversity was found among BFP strains in both cities, with 58% strains producing ESBL and 21% producing AmpC. ESBL (98%), AmpC (50%) and carbapenemase genes (40%) were identified in BFP strains with ESBL-positive phenotype, respectively. The prevalence of BFP strains, antibiotic resistance and β-lactamase genes in Zahedan, a low socioeconomic city with a warm climate, was significantly higher than that of Isfahan. High prevalence of biofilm and β-lactamase producing UPEC strains among strains from Zahedan suggests that socioeconomic status and environmental factors might have a role in pathogenicity of the strains.
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Affiliation(s)
- Ali Qasemi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Fateh Rahimi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran,CONTACT Fateh Rahimi ; Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezarjarib St., Isfahan, Iran
| | - Mohammad Katouli
- Genecology Research Center and School of Science, Technology and Education,University of the Sunshine Coast, Queensland, Australia
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Le CT, Price EP, Sarovich DS, Nguyen TTA, Powell D, Vu-Khac H, Kurtböke Dİ, Knibb W, Chen SC, Katouli M. Comparative genomics of Nocardia seriolae reveals recent importation and subsequent widespread dissemination in mariculture farms in the South Central Coast region, Vietnam. Microb Genom 2022; 8. [PMID: 35786440 PMCID: PMC9455698 DOI: 10.1099/mgen.0.000845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Between 2010 and 2015, nocardiosis outbreaks caused by Nocardia seriolae affected many permit farms throughout Vietnam, causing mass fish mortalities. To understand the biology, origin and epidemiology of these outbreaks, 20 N. seriolae strains collected from farms in four provinces in the South Central Coast region of Vietnam, along with two Taiwanese strains, were analysed using genetics and genomics. PFGE identified a single cluster amongst all Vietnamese strains that was distinct from the Taiwanese strains. Like the PFGE findings, phylogenomic and SNP genotyping analyses revealed that all Vietnamese N. seriolae strains belonged to a single, unique clade. Strains fell into two subclades that differed by 103 SNPs, with almost no diversity within clades (0–5 SNPs). There was no association between geographical origin and subclade placement, suggesting frequent N. seriolae transmission between Vietnamese mariculture facilities during the outbreaks. The Vietnamese strains shared a common ancestor with strains from Japan and China, with the closest strain, UTF1 from Japan, differing by just 220 SNPs from the Vietnamese ancestral node. Draft Vietnamese genomes range from 7.55 to 7.96 Mbp in size, have an average G+C content of 68.2 % and encode 7 602–7958 predicted genes. Several putative virulence factors were identified, including genes associated with host cell adhesion, invasion, intracellular survival, antibiotic and toxic compound resistance, and haemolysin biosynthesis. Our findings provide important new insights into the epidemiology and pathogenicity of N. seriolae and will aid future vaccine development and disease management strategies, with the ultimate goal of nocardiosis-free aquaculture.
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Affiliation(s)
- Cuong T. Le
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Institute for Aquaculture, Nha Trang University, Nha Trang, Vietnam
| | - Erin P. Price
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Sunshine Coast Health Institute, Birtinya, Queensland, Australia
| | - Derek S. Sarovich
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- Sunshine Coast Health Institute, Birtinya, Queensland, Australia
| | - Thu T. A. Nguyen
- Institute for Biotechnology and Environment, Nha Trang University, Nha Trang, Vietnam
| | - Daniel Powell
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Hung Vu-Khac
- Central Vietnam Veterinary Institute, Nha Trang, Vietnam
| | - D. İpek Kurtböke
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Wayne Knibb
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Shih-Chu Chen
- Department of Veterinary Medicine, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan, ROC
| | - Mohammad Katouli
- Centre for Bioinnovation, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
- *Correspondence: Mohammad Katouli,
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Astley DJ, Spang L, Parnian F, Vollmerhausen T, Kilic H, Hora M, Gundogdu A, Katouli M. A comparative study of the clonal diversity and virulence characteristics of uropathogenic Escherichia coli isolated from Australian and Turkish (Turkey) children and adults with urinary tract infections. Germs 2022; 12:214-230. [PMID: 36504619 PMCID: PMC9719378 DOI: 10.18683/germs.2022.1324] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 10/21/2021] [Revised: 03/30/2022] [Accepted: 05/20/2022] [Indexed: 12/15/2022]
Abstract
Introduction The virulence-associated gene (VAG) repertoire and clonal organization of uropathogenic Escherichia coli (UPEC) strains is influenced by host demographic, geographic locale, and the setting of urinary tract infection (UTI). Nevertheless, a direct comparison of these features among Australian and Turkish UPEC remains unexplored. Accordingly, this study investigated the clonal composition and virulence characteristics of a collection of UPEC isolated from Australian and Turkish UTI patients. Methods A total of 715 UPEC strains isolated from Australian (n=361) and Turkish (n=354) children and adults with hospital (HA)- and community-acquired (CA)-UTIs were included in this study. Typing of the strains using RAPD-PCR and PhPlate fingerprinting grouped all strains into 25 clonal groups (CGs). CG representatives were phylogrouped and screened for the presence of 18 VAGs associated with extraintestinal pathogenic E. coli. Results Turkish UPEC strains were characterized by high clonal diversity and predominance of the phylogroup D, while few distinct clonal groups with phylogenetic group B2 backgrounds dominated among the Australian strains. Twelve identical CGs were shared between ≥1 patient group from either country. Australian strains, particularly those isolated from children with HA-UTI, showed higher virulence potential than their Turkish counterparts, carrying significantly more genes associated with adhesion, iron acquisition and capsule biosynthesis. Conclusions This study identified identical CGs of UPEC causing HA- and CA-UTIs among Australian and Turkish UTI patients. These CGs frequently carried VAGs associated with adhesion, iron acquisition, immune evasion, and toxin production, which may contribute to their ability to disseminate internationally and to cause UTI.
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Affiliation(s)
- Dylan John Astley
- BSc, School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Labolina Spang
- BSc, School of Science, Technology and Engineering; University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Fatemeh Parnian
- BSc, School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Tara Vollmerhausen
- PhD, School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Huseyin Kilic
- PhD, Department of Microbiology and Clinical Microbiology, Faculty of Medicine, Erciyes University, Kayseri 38039, Turkey
| | - Mehmet Hora
- PhD, Genome and Stem Cell Center (GenKok), Erciyes University, Kayseri, Turkey
| | - Aycan Gundogdu
- PhD, Department of Microbiology and Clinical Microbiology, Faculty of Medicine, Erciyes University, Turkey and Genome and Stem Cell Center (GenKok), Erciyes University, Kayseri 38039, Turkey
| | - Mohammad Katouli
- PhD, School of Science, Technology and Engineering and Centre for Bioinnovation, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia,Corresponding author: Mohammad Katouli,
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Allom M, Panchalingam H, Katouli M, Kurtböke D. Human pathogenic bacteria on fresh produce and their control using bacteriophage treatment: an E. coli example from the Sunshine Coast region. Microbiol Aust 2022. [DOI: 10.1071/ma22059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Qasemi A, Rahimi F, Katouli M. Genetic diversity and virulence characteristics of biofilm-producing uropathogenic Escherichia coli. Int Microbiol 2021; 25:297-307. [PMID: 34705131 DOI: 10.1007/s10123-021-00221-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 08/16/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 10/20/2022]
Abstract
Uropathogenic E. coli (UPEC) strains exhibit different levels of biofilm formation that help adhesion of the bacteria to uroepithelial cells. We investigated the genetic diversity and virulence-associated genes (VAGs) of biofilm-producing UPEC. A collection of 107 biofilm-producing (BFP) UPEC strains isolated from patients with UTI in Iran were divided into three groups of strong, moderate, and weak BFPs after a quantitative microtiter plate assay, and the involvement of curli and cellulose in adhesion of the strains to T24 cell line was confirmed by the construction of csgD and yedQ mutants of two representative UPEC strains. BFP strains were tested for their genetic diversity, phylogenetic groups, and the presence of 15 VAGs. A significant decrease in adhesion of csgD and yedQ mutant strains confirmed the role of biofilm production in adhesion to uroepithelial cells. A high diversity was found among all three groups of strong (Di = 0.998), moderate (Di = 0.998), and weak (Di = 0.988) BFPs with majority of the strains belonging to phylogroups B2 (44.9%) and A (24.3%). Strong BFP strains carried significantly higher level papEF, hlyA, and iutA than other BFP groups. In contrast, the presence of fimH, focG, sfaS, set-1, and cvaC was more pronounced among weak BFP strains. There exists a high genetic diversity among the BFP strains with different VGA profiles. However, the high prevalence of phylogroup A among BFP strains suggests the fitness of commensal E. coli strains to cause UTI in this country.
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Affiliation(s)
- Ali Qasemi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezarjarib St., Isfahan, Iran
| | - Fateh Rahimi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezarjarib St., Isfahan, Iran.
| | - Mohammad Katouli
- Genecology Research Center, Maroochydore, QLD, Australia.,School of Science, Technology and Education, University of the Sunshine Coast, Maroochydore, QLD, Australia
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O’Dea C, Huerlimann R, Masters N, Kuballa A, Veal C, Fisher P, Stratton H, Katouli M. Microbial Diversity Profiling of Gut Microbiota of Macropus giganteus Using Three Hypervariable Regions of the Bacterial 16S rRNA. Microorganisms 2021; 9:microorganisms9081721. [PMID: 34442800 PMCID: PMC8400485 DOI: 10.3390/microorganisms9081721] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/19/2021] [Accepted: 08/03/2021] [Indexed: 01/04/2023] Open
Abstract
Animal faecal contamination of surface waters poses a human health risk, as they may contain pathogenic bacteria or viruses. Of the numerous animal species residing along surface waterways in Australia, macropod species are a top contributor to wild animals’ faecal pollution load. We characterised the gut microbiota of 30 native Australian Eastern Grey Kangaroos from six geographical regions (five kangaroos from each region) within South East Queensland in order to establish their bacterial diversity and identify potential novel species-specific bacteria for the rapid detection of faecal contamination of surface waters by these animals. Using three hypervariable regions (HVRs) of the 16S rRNA gene (i.e., V1–V3, V3–V4, and V5–V6), for their effectiveness in delineating the gut microbial diversity, faecal samples from each region were pooled and microbial genomic DNA was extracted, sequenced, and analysed. Results indicated that V1-V3 yielded a higher taxa richness due to its larger target region (~480 bp); however, higher levels of unassigned taxa were observed using the V1-V3 region. In contrast, the V3–V4 HVR (~569 bp) attained a higher likelihood of a taxonomic hit identity to the bacterial species level, with a 5-fold decrease in unassigned taxa. There were distinct dissimilarities in beta diversity between the regions, with the V1-V3 region displaying the highest number of unique taxa (n = 42), followed by V3–V4 (n = 11) and V5–V6 (n = 8). Variations in the gut microbial diversity profiles of kangaroos from different regions were also observed, which indicates that environmental factors may impact the microbial development and, thus, the composition of the gut microbiome of these animals.
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Affiliation(s)
- Christian O’Dea
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia; (C.O.); (N.M.); (A.K.)
| | - Roger Huerlimann
- Marine Climate Change Unit, Okinawa Institute of Science and Technology (OIST), 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan;
| | - Nicole Masters
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia; (C.O.); (N.M.); (A.K.)
| | - Anna Kuballa
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia; (C.O.); (N.M.); (A.K.)
| | - Cameron Veal
- Seqwater, 117 Brisbane Street, Ipswich, QLD 4305, Australia; (C.V.); (P.F.)
| | - Paul Fisher
- Seqwater, 117 Brisbane Street, Ipswich, QLD 4305, Australia; (C.V.); (P.F.)
| | - Helen Stratton
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia;
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia; (C.O.); (N.M.); (A.K.)
- Correspondence: ; Tel.: +61-7-54302845
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Wright L, Katouli M, Kurtböke Dİ. Isolation and Characterization of Nocardiae Associated with Foaming Coastal Marine Waters. Pathogens 2021; 10:579. [PMID: 34068658 PMCID: PMC8151412 DOI: 10.3390/pathogens10050579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/19/2021] [Accepted: 05/06/2021] [Indexed: 11/17/2022] Open
Abstract
Nocardiosis is an infectious disease caused by Nocardia species that occurs worldwide, albeit more prevalently in tropical/subtropical regions. It can appear as either acute, subacute or as a chronic infection mostly with those with a compromised/weakened immune system. Inhalation of spores and or mycelium fragments is the main transmission route for developing pulmonary nocardiosis. In contrast, cutaneous nocardiosis usually occurs via direct contact. In the subtropical region of the Sunshine Coast in Australia foaming events with thick and persistent and orange-brown color foam have been observed during summer seasons in the near shore marine environments. This study reports the existence of nocardiae in these near shore marine environments by the use of a novel isolation method which used the gas requirements of nocardiae as a selective battery. A total of 32 nocardiae were isolated with the use of this novel method and subsequently conducted molecular identification methods confirmed that the isolates belonged to the genus Nocardia. Twenty-one isolates out of the 32 were closely related to N. nova strains MGA115 and one was related to CBU 09/875, in addition when compared with human pathogenic nocardiae twenty of the isolates were found to be related to N. nova strain JCM 6044. Isolates displayed varied resistance against some of the antibiotics tested when interpretation threshold recommended the Comite de L'Antibiogramme de la Societe Francaise de Microbiologie were used. The highest level of resistance against cefotaxime (n = 27) and ceftriaxone (n = 24). Some of the isolates (n = 6) that displayed resistance to selected antibiotics also possessed potential human pathogenic characteristics such as adherence and translocation through human long epithelial cells as well as displaying phage resistance (n = 26). They might thus present a potential public health risk if frequently encountered through exposure to aerosols generated by the foam as well as direct contact through a wound. Preventative measures to control the growth of nocardiae in such environments such as the control of pollutants, might prevent potential infections that might be caused by these bacteria in humans as well as in marine animals.
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Affiliation(s)
| | | | - D. İpek Kurtböke
- Genecology Research Centre, School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia; (L.W.); (M.K.)
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Rahimi F, Katouli M, Pourshafie MR. Characterization of methicillin-resistant Staphylococcus aureus strains in sewage treatment plants in Tehran, Iran. J Water Health 2021; 19:216-228. [PMID: 33901019 DOI: 10.2166/wh.2021.247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Multidrug-resistant Staphylococcus aureus strains have been commonly found in hospitals and communities causing wide ranges of infections among humans and animals. Typing of these strains is a key factor to reveal their clonal dissemination in different regions. We investigated the prevalence and dissemination of different clonal groups of S. aureus with resistance phenotype to multiple antibiotics in two sewage treatment plants (STPs) in Tehran, Iran over four sampling occasions. A total of 576 S. aureus were isolated from the inlet, sludge and outlet. Of these, 80 were identified as methicillin-resistant S. aureus (MRSA) and were further characterized using a combination of Phene Plate (PhP) typing, staphylococcal cassette chromosome mec (SCCmec), ccr types, prophage and antibiotic-resistant profiling. In all, eight common type (CT) and 13 single PhP type were identified in both STPs, with one major CT accounting for 38.8% of the MRSA strains. These strains belonged to three prophage patterns and five prophage types with SCCmec type III being the predominant type. Resistance to 11 out of the 17 antibiotics tested was significantly (P < 0.0059) higher among the MRSA isolates than methicillin-sensitive S. aureus (MSSA) strains. The persistence of the strains in samples collected from the outlet of both STPs was 31.9% for MRSA and 23.1% for MSSA. These data indicated that while the sewage treatment process, in general, is still useful for removing most MRSA populations, some strains with SCCmec type III may have a better ability to survive the STP process.
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Affiliation(s)
- Fateh Rahimi
- Department of Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran E-mail:
| | - Mohammad Katouli
- Genecology Research Center, School of Health and Sport Sciences, University of the Sunshine Coast, Queensland, Australia
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Smit B, Kuballa A, Coulson S, Katouli M. Interaction of Candida albicans with human gut epithelium in the presence of Live Biotherapeutic Products (LBPs). Microbiol Aust 2021. [DOI: 10.1071/ma21035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Candida albicans is a semi-ubiquitous pathobiont that is known to significantly impact human health and wellbeing, causing a significant financial strain on the medical system. Due to increasing antifungal resistance, there is a growing need for novel fungal therapeutics to treat diseases caused by this fungus. The development and use of Live Biotherapeutic Products (LBPs) is an innovative and novel approach to potentially treating Candidiasis and other comorbidities associated with C. albicans infection. To evaluate their anti-pathogenic efficacy, it is necessary to understand the underlying mechanisms involved, via the use of biomimetic cell models. In this study, six LBPs were chosen to investigate their competitive inhibitory effect against C. albicans using a co-culture of Caco-2 cells and mucous-secreting HT29-MTX cells to mimic human gut epithelium. The LBP strains were supplied by Servatus Biopharmaceuticals and identified as SVT 01D1, SVT 04P1, SVT 05P2, SVT 06B1, SVT 07R1 and SVT 08Z1. Five out of the six LBPs showed a significant reduction in the adhesion of C. albicans and all six LBPs reduced C. albicans invasion in the co-culture cells to varying degrees. There was no significant difference between co-inoculation of C. albicans with the LBPs or pre-inoculation of LBPs before the addition of C. albicans. The potential of these LBPs as novel anti-fungal therapeutics for the treatment of C. albicans diseases can be further documented in clinical trials.
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Astley DJ, Masters N, Kuballa A, Katouli M. Commonality of adherent-invasive Escherichia coli isolated from patients with extraintestinal infections, healthy individuals and the environment. Eur J Clin Microbiol Infect Dis 2020; 40:181-192. [PMID: 33063232 DOI: 10.1007/s10096-020-04066-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 10/05/2020] [Indexed: 01/17/2023]
Abstract
Adherent-invasive Escherichia coli (AIEC) has been implicated as a microbiological factor in inflammatory bowel disease (IBD) pathogenesis. These strains are defined by their ability to adhere to and invade intestinal epithelial cells, and to survive and replicate in macrophages. We postulated that AIEC strains may commonly inhabit the gut of healthy individuals (HI), cause extraintestinal infections, and be found in sewage treatment plants (STP) and surface waters (SW). A total of 808 E. coli strains isolated from HI; patients with community-acquired urinary tract infection (CA-UTI), septicaemia and urosepsis; STP; and SW, showing a diffuse adhesion pattern to Caco-2 cells were included in this study. Typing of the strains using a combination of RAPD-PCR and PhPlate fingerprinting grouped them into 48 common clones (CCs). Representatives of each CC were tested for the ability to invade Caco-2 cells, survive and replicate in macrophages, and for the presence of six virulence genes commonly found among AIEC strains. Twenty CCs were deemed AIEC based on their ability to survive and replicate in macrophages, while encoding htrA, dsbA and clbA genes. These CCs primarily originated from HI and CA-UTI patients but were also detected in secondary locations including STP and SW. Strains lacking intramacrophagic survival and replication abilities were regarded as diffusely adhering E. coli (DAEC). Certain clones of AIEC are common in the gut of HI whilst promoting CA-UTI. The survival and persistence of AIEC in STP and SW may have serious public health ramifications for individuals predisposed to IBD.
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Affiliation(s)
- D J Astley
- Inflammation and Healing Cluster, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
| | - N Masters
- Inflammation and Healing Cluster, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
| | - A Kuballa
- Inflammation and Healing Cluster, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
| | - M Katouli
- Inflammation and Healing Cluster, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia.
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Gorgannezhad L, Sreejith KR, Christie M, Jin J, Ooi CH, Katouli M, Stratton H, Nguyen NT. Core-Shell Beads as Microreactors for Phylogrouping of E. coli Strains. Micromachines (Basel) 2020; 11:mi11080761. [PMID: 32784703 PMCID: PMC7464145 DOI: 10.3390/mi11080761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/29/2020] [Accepted: 08/04/2020] [Indexed: 02/07/2023]
Abstract
Multiplex polymerase chain reaction (PCR) is an effective tool for simultaneous detection of target genes. Nevertheless, their use has been restricted due to the intrinsic interference between primer pairs. Performing several single PCRs in an array format instead of a multiplex PCR is a simple way to overcome this obstacle. However, there are still major technical challenges in designing a new generation of single PCR microreactors with a small sample volume, rapid thermal cycling, and no evaporation during amplification. We report a simple and robust core-shell bead array for a series of single amplifications. Four core-shell beads with a polymer coating and PCR mixture were synthesized using liquid marble formation and subsequent photo polymerization. Each bead can detect one target gene. We constructed a customised system for thermal cycling of these core-shell beads. Phylogrouping of the E. coli strains was carried out based on the fluorescent signal of the core-shell beads. This platform can be a promising alternative for multiplex nucleic acid analyses due to its simplicity and high throughput. The platform reported here also reduces the cycling time and avoids evaporation as well as contamination of the sample during the amplification process.
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Affiliation(s)
- Lena Gorgannezhad
- Queensland Micro- and Nanotechnology Centre, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (L.G.); (K.R.S.); (J.J.); (C.H.O.)
- School of Environment and Science, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (M.C.); (H.S.)
| | - Kamalalayam Rajan Sreejith
- Queensland Micro- and Nanotechnology Centre, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (L.G.); (K.R.S.); (J.J.); (C.H.O.)
| | - Melody Christie
- School of Environment and Science, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (M.C.); (H.S.)
| | - Jing Jin
- Queensland Micro- and Nanotechnology Centre, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (L.G.); (K.R.S.); (J.J.); (C.H.O.)
| | - Chin Hong Ooi
- Queensland Micro- and Nanotechnology Centre, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (L.G.); (K.R.S.); (J.J.); (C.H.O.)
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia;
| | - Helen Stratton
- School of Environment and Science, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (M.C.); (H.S.)
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Nathan Campus, Griffith University, 170 Kessels Road, Brisbane, QLD 4111, Australia; (L.G.); (K.R.S.); (J.J.); (C.H.O.)
- Correspondence:
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Gray J, Masters N, Wiegand A, Katouli M. Field assessment of horse-associated genetic markers HoF597 and mtCytb for detecting the source of contamination in surface waters. Can J Microbiol 2020; 66:623-630. [PMID: 32692953 DOI: 10.1139/cjm-2019-0499] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 11/22/2022]
Abstract
We investigated the specificity and sensitivity of two horse-associated markers, HoF597 and Horse mtCytb, and 12 mitochondrial and bacterial markers of six animal species (human, cow, pig, bird, dog, chicken) in the faecal samples of 50 individual horses. Both horse markers were detected in 48 (96%) faecal samples. Cross-reactivity with dog (BacCan545) and pig (P23-2) occurred in 88% and 72% of horse faecal samples, respectively. Several other bacterial and mitochondrial markers of non-target hosts were also detected; however, their specificities were >80%. Analyses of samples from surface waters (n = 11) on or adjacent to properties from which horse faecal samples had been collected showed only the presence of HoF597 but not horse mitochondrial marker. Our data suggest that while bacterial and (or) mitochondrial markers of other animal species may be present in horse faeces, dog and pig markers may predominantly be present in horse faecal samples, which points to their nonspecificity as markers for microbial source tracking. Although HoF597 and Horse mtCytb are highly sensitive and specific for the detection of horse faecal pollution, because of their low numbers, mitochondrial (mtDNA) markers may not be robust for screening surface waters.
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Affiliation(s)
- Jessica Gray
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Nicole Masters
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Aaron Wiegand
- School of Science and Engineering, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
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15
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Sheludchenko M, Padovan A, Katouli M, Stratton H. Acinetobacter baumannii detected on modified charcoal–cefoperazone–deoxycholate agar in a waste stabilization pond. Can J Microbiol 2020; 66:206-213. [DOI: 10.1139/cjm-2019-0282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Campylobacter is a recommended reference pathogen for the verification and validation of water recycling schemes in Australia and globally. In a larger study investigating the efficacy of pathogen removal in waste stabilization ponds (WSP), we cultivated bacteria from wastewater samples on modified charcoal–cefoperazone–deoxycholate agar (mCCDA) targeting the growth of Campylobacter. A high number of colonies characteristic of Campylobacter grew on this selective medium, but this did not correlate with qPCR data. Using primers targeting the 16S rRNA gene, and additional confirmatory tests to detect VS1, ompA, blaOXA-51-like, blaOXA-23-like genes, we tested 80 random colonies from 10 WSP samples. All 80 were identified as Acinetobacter baumannii. Wastewater grab samples taken three times over 6 months throughout the WSP system showed removal of A. baumannii in the WSP at rates similar to that of Escherichia coli. Our study suggests that mCCDA agar is not a suitable medium for isolating Campylobacter from environmental samples and that A. baumannii can be used as an indicator for removal of pathogens in WSPs.
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Affiliation(s)
- Maxim Sheludchenko
- School of Environment and Science, Griffith University, Nathan, Queensland, Australia
| | - Anna Padovan
- Genecology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Mohammad Katouli
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Helen Stratton
- School of Environment and Science, Griffith University, Nathan, Queensland, Australia
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Norouzian H, Katouli M, Shahrokhi N, Sabeti S, Pooya M, Bouzari S. The relationship between phylogenetic groups and antibiotic susceptibility patterns of Escherichia coli strains isolated from feces and urine of patients with acute or recurrent urinary tract infection. Iran J Microbiol 2019; 11:478-487. [PMID: 32148679 PMCID: PMC7048958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
BACKGROUND AND OBJECTIVES B2 and D have been mentioned as the most common phylogenetic groups among uropathogenic Escherichia coli. However, there is still controversy about the importance of these phylo-groups. This study was conducted to investigate the probable relation between these groups and antibiotic resistance patterns of E. coli isolates derived from urine and feces of the patients with acute or recurrent UTI. MATERIALS AND METHODS 10 isolates were recovered from urine and feces samples of patients with different phases of UTI in whom E. coli was causative pathogen. Biochemical fingerprinting was performed to classify the isolates and select their appropriate representatives. Phylogenetic grouping was performed using multiplex PCR, and antibiotic resistance was determined by disk diffusion method. RESULTS Five-hundred-sixty E. coli isolates were derived from 56 UTI patients (27 acute, 29 recurrent). Among them, 261 isolates were selected using biochemical fingerprinting. All the isolates were sensitive to imipenem and nitrofurantoin. Compared to other phylo-groups, the isolates in group D showed considerably different frequencies in acute vs. recurrent phase of UTI, in urine vs. stool samples, in males vs. females, and in- vs. out-patients. They were more resistant to the antibiotics (except norfloxacin), and in contrast to others, this was seen more in acute UTI, especially in urine samples. Multi-drug resistance pattern was also meaningfully higher in group D. CONCLUSION Although phylo-groups B2 and D of E. coli bacteria are more responsible for UTI, group D isolates seem to be more resistant and probably more virulent, even than the ones from group B2.
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Affiliation(s)
- Hossein Norouzian
- Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Queensland, Australia
| | - Nader Shahrokhi
- Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran
| | - Sharam Sabeti
- Deapartment of Pathology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Pooya
- Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran,Corresponding author: Mohammad Pooya, MD, PhD, Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran., Tel: +982164112220, Fax: +982164112803,
| | - Saeid Bouzari
- Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran,Corresponding author: Saeid Bouzari, PhD, Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran., Tel: +982164112220, Fax: +982164112803,
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O'Dea C, Zhang Q, Staley C, Masters N, Kuballa A, Fisher P, Veal C, Stratton H, Sadowsky MJ, Ahmed W, Katouli M. Compositional and temporal stability of fecal taxon libraries for use with SourceTracker in sub-tropical catchments. Water Res 2019; 165:114967. [PMID: 31430652 DOI: 10.1016/j.watres.2019.114967] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 08/06/2019] [Accepted: 08/08/2019] [Indexed: 06/10/2023]
Abstract
Characterization of microbial communities using high-throughput amplicon sequencing is an emerging approach for microbial source tracking of fecal pollution. This study used SourceTracker software to examine temporal and geographical variability of fecal bacterial community profiles to identify pollutant sources in three freshwater catchments in sub-tropical Australia. Fecal bacterial communities from 10 animal species, humans, and composite wastewater samples from six sewage treatment plants were characterized and compared to freshwater samples using Illumina amplicon sequencing of the V5-V6 regions of the 16S rRNA gene. Source contributions were calculated in SourceTracker using new fecal taxon libraries as well as previously generated libraries to determine the effects of geographic and temporal variability on source assignments. SourceTracker determined 16S rRNA bacterial communites within freshwater samples, shared taxonomic similarities to that of wastewater at low levels (typically <3%). SourceTraker also predicted occasional fecal detection of deer and flying fox sources in the water samples. No significant differences in source contributions were observed within sequences from current and previously characterized fecal samples (P ≥ 0.107). However, significant differences were observed between previously characterized and newly characterized source communities (ANOSIM P ≤ 0.001), which shared <15% community composition. Results suggest temporal instability of fecal taxon libraries among tested sources and highlight continual evaluation of community-based MST using confirmatory qPCR analyses of marker genes.
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Affiliation(s)
- Christian O'Dea
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.
| | - Qian Zhang
- The Biotechnology Institute, University of Minnesota, MN, 55108, USA.
| | - Christopher Staley
- The Biotechnology Institute, University of Minnesota, MN, 55108, USA; Department of Surgery, University of Minnesota, MN, 55455, USA.
| | - Nicole Masters
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.
| | - Anna Kuballa
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.
| | - Paul Fisher
- Seqwater, 117 Brisbane Street, Ipswich, QLD, Australia.
| | - Cameron Veal
- Seqwater, 117 Brisbane Street, Ipswich, QLD, Australia.
| | - Helen Stratton
- School of Environment and Science, Griffith University, Nathan, QLD, Australia.
| | - Michael J Sadowsky
- The Biotechnology Institute, University of Minnesota, MN, 55108, USA; Department of Soil, Water, and Climate, University of Minnesota, MN, 55108, USA; Department of Plant and Microbial Biology, University of Minnesota, MN, 55108, USA.
| | - Warish Ahmed
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, QLD, Australia.
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.
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Ahmed W, O'Dea C, Masters N, Kuballa A, Marinoni O, Katouli M. Marker genes of fecal indicator bacteria and potential pathogens in animal feces in subtropical catchments. Sci Total Environ 2019; 656:1427-1435. [PMID: 30625670 DOI: 10.1016/j.scitotenv.2018.11.439] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/06/2018] [Accepted: 11/29/2018] [Indexed: 06/09/2023]
Abstract
We investigated the abundance of marker genes of two fecal indicator bacteria (FIB) and eight potential pathogens in fecal samples of humans (n = 14) and 10 domestic and native wild animals (n = 134). For each target animal, between 10 and 14 individual fecal samples were collected (n = 148 individual fecal samples in total). The abundance of FIB and potential pathogens within each sample was determined using quantitative PCR (qPCR) assays. All animals tested were positive for Escherichia coli (EC) and the concentrations ranged from 6.13 (flying fox) to 8.87 (chicken) log10 GC/g of feces. These values for Enterococcus spp. (ENT) were 5.25 log10 GC/g for flying fox and 8.12 log10 GC/g of feces for chicken. Moderate correlations were observed between EC with P. aeruginosa, EC O157 and Cryptosporidium parvum, whereas weak correlations were observed between EC and Salmonella spp. and Giardia lamblia, Mycobacterium avium complex (MAC) and Campylobacter spp. The prevalence of MAC and P. aeruginosa were low in dog (14.3% each) and moderate (57.2%, MAC; 42.9% P. aeruginosa) in Eastern grey kangaroo fecal samples. Cryptosporidium parvum was detected in one cattle and one human fecal sample, while G. lamblia was detected in one dog, one flying fox, and one pig fecal samples. Among the eight potential pathogens tested, five pathogens were detected in chicken and dog fecal samples. The remaining animal species contained up to three potential pathogens in their feces. The data generated in this study may aid in the calculation of pathogen loads in the environment, and hence to assess the risks from human and animal fecal contamination of source waters.
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Affiliation(s)
- Warish Ahmed
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, QLD 4102, Australia.
| | - Christian O'Dea
- GeneCology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia
| | - Nicole Masters
- GeneCology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia
| | - Anna Kuballa
- GeneCology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia
| | - Oswald Marinoni
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, QLD 4102, Australia
| | - Mohammad Katouli
- GeneCology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia
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19
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Birault A, Molina E, Toquer G, Lacroix-Desmazes P, Marcotte N, Carcel C, Katouli M, Bartlett JR, Gérardin C, Wong Chi Man M. Large-Pore Periodic Mesoporous Organosilicas as Advanced Bactericide Platforms. ACS Appl Bio Mater 2018; 1:1787-1792. [PMID: 34996279 DOI: 10.1021/acsabm.8b00474] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Despite the versatility of periodic mesoporous organosilicas (PMOs), the bactericide capacity of these hybrid platforms has seldom been explored. Herein, we describe the synthesis of large-pore phenylene-bridged PMOs, mesostructured by polyion complex (PIC) micelles (PICPMOs) incorporating an antibiotic, neomycin B. A key feature of this approach is that the bioactive molecules are directly encapsulated within the PICPMOs during their formation. The engineered PICPMOs exhibit a well-ordered hexagonal mesophase with a molecular-scale crystallinity and large mesopores (8 nm), which facilitates pH-triggered delivery of the drug. The results obtained with a pathogenic Escherichia coli strain clearly demonstrate the potential of such PICPMOs for antibacterial applications.
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Affiliation(s)
- Albane Birault
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34090, France
| | - Emilie Molina
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34090, France
| | - Guillaume Toquer
- Institut de Chimie Séparative de Marcoule UMR 5257, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule F-30207, France
| | | | | | - Carole Carcel
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34090, France
| | - Mohammad Katouli
- Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, 90 Sippy Downs Dr, Sippy Downs, Queensland 4556, Australia
| | - John R Bartlett
- Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, 90 Sippy Downs Dr, Sippy Downs, Queensland 4556, Australia
| | - Corine Gérardin
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier 34090, France
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Neuman C, Hatje E, Smullen R, Bowman J, Katouli M. The effect of fishmeal inclusion and prebiotic supplementation on the hindgut faecal microbiota of farmed Tasmanian Atlantic salmon (Salmo salarL.). J Appl Microbiol 2018; 125:952-963. [DOI: 10.1111/jam.13930] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 04/19/2018] [Accepted: 05/10/2018] [Indexed: 01/28/2023]
Affiliation(s)
- C. Neuman
- Genecology Research Centre; Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Qld Australia
| | - E. Hatje
- Genecology Research Centre; Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Qld Australia
| | - R. Smullen
- Ridley Aqua-Feed Pty; Narangba Qld Australia
| | - J.P. Bowman
- Tasmanian Institute of Agriculture; University of Tasmania; Hobart Tas. Australia
| | - M. Katouli
- Genecology Research Centre; Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Qld Australia
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21
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Owrangi B, Masters N, Kuballa A, O'Dea C, Vollmerhausen TL, Katouli M. Invasion and translocation of uropathogenic Escherichia coli isolated from urosepsis and patients with community-acquired urinary tract infection. Eur J Clin Microbiol Infect Dis 2018; 37:833-839. [PMID: 29340897 DOI: 10.1007/s10096-017-3176-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 12/21/2017] [Indexed: 02/06/2023]
Abstract
Uropathogenic Escherichia coli (UPEC) strains are found in high numbers in the gut of patients with urinary tract infections (UTIs). We hypothesised that in hospitalised patients, UPEC strains might translocate from the gut to the blood stream and that this could be due to the presence of virulence genes (VGs) that are not commonly found in UPEC strains that cause UTI only. To test this, E. coli strains representing 75 dominant clonal groups of UPEC isolated from the blood of hospitalised patients with UTI (urosepsis) (n = 22), hospital-acquired (HA) UTI without blood infection (n = 24) and strains isolated from patients with community-acquired (CA)-UTIs (n = 29) were tested for their adhesion to, invasion and translocation through Caco-2 cells, in addition to the presence of 34 VGs associated with UPEC. Although there were no differences in the rate and degree of translocation among the groups, urosepsis and HA-UTI strains showed significantly higher abilities to adhere (P = 0.0095 and P < 0.0001 respectively) and invade Caco-2 cells than CA-UTI isolates (P = 0.0044, P = 0.0048 respectively). Urosepsis strains also carried significantly more VGs than strains isolated from patients with only UTI and/or CA-UTI isolates. In contrast, the antigen 43 allele RS218 was found more commonly among CA-UTI strains than in the other two groups. These data indicate that UPEC strains, irrespective of their source, are capable of translocating through gut epithelium. However, urosepsis and HA-UTI strains have a much better ability to interact with gut epithelia and have a greater virulence potential than CA-UPEC, which allows them to cause blood infection.
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Affiliation(s)
- B Owrangi
- Inflammation and Healing Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - N Masters
- Inflammation and Healing Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - A Kuballa
- Inflammation and Healing Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - C O'Dea
- Inflammation and Healing Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - T L Vollmerhausen
- Inflammation and Healing Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia.,Bacterial Stress Response Group, Microbiology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - M Katouli
- Inflammation and Healing Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia.
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22
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Masters NM, Wiegand A, Thompson JM, Vollmerhausen TL, Hatje E, Katouli M. Enterococci populations of a metropolitan river after an extreme flood event: prevalence, persistence and virulence determinants. J Water Health 2017; 15:684-694. [PMID: 29040072 DOI: 10.2166/wh.2017.284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigated the prevalence, persistence and virulence determinants of enterococci populations in water samples collected over three rounds following an extreme flood event in a metropolitan river. Enterococci (n = 482) were typed using the high resolution biochemical fingerprinting method (PhP typing) and grouped into common (C) or single (S) biochemical phenotypes (BPTs). In all, 23 C-BPTs (72.6% of isolates) were found across the sites. A representative isolate of each C-BPT was identified to the species level and tested for the presence of seven virulence genes (VGs), biofilm formation and resistance to 14 antibiotics. The enterococci concentrations in samples collected during the first two rounds were above national recreational water guidelines. By round three, enterococci concentrations decreased significantly (P < 0.05). However, 11 C-BPTs (55.5% of isolates) persisted across all sampling rounds. E. casseliflavus and E. mundtii were the most common enterococci populations comprising of >57% of all isolates. Ten of the 11 most dominant C-BPTs were resistant to multiple antibiotics and harboured one or more VGs. The high prevalence of antibiotic resistance and VGs among enterococci isolates in this catchment not only provides them with niche advantages but also poses a risk to public health.
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Affiliation(s)
- Nicole M Masters
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Aaron Wiegand
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Jasmin M Thompson
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Tara L Vollmerhausen
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Eva Hatje
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
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Kürekci C, Aydin M, Yipel M, Katouli M, Gündoğdu A. Characterization of extended spectrum β-lactamase (ESBL)-producing Escherichia coli in Asi (Orontes) River in Turkey. J Water Health 2017; 15:788-798. [PMID: 29040081 DOI: 10.2166/wh.2017.257] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, the presence of extended spectrum β-lactamase (ESBL)-producing Escherichia coli in aquatic environments (the Orontes River and an urban wastewater) was investigated. Fifty-four E. coli strains resistant to cefotaxime were isolated from the river waters and nearby waste water treatment plant and screened for ESBL gene variants, different classes of integrons and sulfonamide resistance genes. The ESBL-producing E. coli strains were further characterized by PhP-typing system, phylogenetic grouping and antimicrobial susceptibility testing. Of the 54 ESBL-producing strains, 14 (25.9%) belonged to four common PhP types and the remaining were of single types. CTX-M type ESBL genes were identified in 68% of the isolates. The most predominant specific CTX-M subtype identified was blaCTX-M-15 (n = 36), followed by blaCTX-M-1 (n = 1). None of the isolates were SHV and OXA positive. Most of the ESBL positive isolates (n = 37; 68.5%) were harboring sul gene. This study indicates a widespread distribution of CTX-M-15 producing E. coli strains in the surface waters in part of Turkey, suggesting an aquatic reservoir for ESBL genes.
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Affiliation(s)
- Cemil Kürekci
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay 31030, Turkey E-mail:
| | - Muhsin Aydin
- Department of Biology, Faculty of Science and Letters, Adıyaman University, Adıyaman 02040, Turkey
| | - Mustafa Yipel
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay 31030, Turkey
| | - Mohammad Katouli
- Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia
| | - Aycan Gündoğdu
- Department of Medical Microbiology, Faculty of Medicine, Erciyes University, Kayseri 38030, Turkey
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Nobakht M, Trueman SJ, Wallace HM, Brooks PR, Streeter KJ, Katouli M. Antibacterial Properties of Flavonoids from Kino of the Eucalypt Tree, Corymbia torelliana. Plants (Basel) 2017; 6:plants6030039. [PMID: 28906457 PMCID: PMC5620595 DOI: 10.3390/plants6030039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 09/11/2017] [Accepted: 09/11/2017] [Indexed: 11/16/2022]
Abstract
Traditional medicine and ecological cues can both help to reveal bioactive natural compounds. Indigenous Australians have long used kino from trunks of the eucalypt tree, Corymbia citriodora, in traditional medicine. A closely related eucalypt, C. torelliana, produces a fruit resin with antimicrobial properties that is highly attractive to stingless bees. We tested the antimicrobial activity of extracts from kino of C. citriodora, C. torelliana × C. citriodora, and C. torelliana against three Gram-negative and two Gram-positive bacteria and the unicellular fungus, Candida albicans. All extracts were active against all microbes, with the highest activity observed against P. aeruginosa. We tested the activity of seven flavonoids from the kino of C. torelliana against P. aeruginosa and S. aureus. All flavonoids were active against P. aeruginosa, and one compound, (+)-(2S)-4',5,7-trihydroxy-6-methylflavanone, was active against S. aureus. Another compound, 4',5,7-trihydroxy-6,8-dimethylflavanone, greatly increased biofilm formation by both P. aeruginosa and S. aureus. The presence or absence of methyl groups at positions 6 and 8 in the flavonoid A ring determined their anti-Staphylococcus and biofilm-stimulating activity. One of the most abundant and active compounds, 3,4',5,7-tetrahydroxyflavanone, was tested further against P. aeruginosa and was found to be bacteriostatic at its minimum inhibitory concentration of 200 µg/mL. This flavanonol reduced adhesion of P. aeruginosa cells while inducing no cytotoxic effects in Vero cells. This study demonstrated the antimicrobial properties of flavonoids in eucalypt kino and highlighted that traditional medicinal knowledge and ecological cues can reveal valuable natural compounds.
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Affiliation(s)
- Motahareh Nobakht
- Centre for Genetics, Ecology and Physiology, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia.
| | - Stephen J Trueman
- Centre for Genetics, Ecology and Physiology, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia.
| | - Helen M Wallace
- Centre for Genetics, Ecology and Physiology, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia.
| | - Peter R Brooks
- Centre for Genetics, Ecology and Physiology, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia.
| | - Klrissa J Streeter
- Centre for Genetics, Ecology and Physiology, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia.
| | - Mohammad Katouli
- Centre for Genetics, Ecology and Physiology, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia.
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Masters NM, Wiegand A, Thompson JM, Vollmerhausen TL, Hatje E, Katouli M. Assessing the population dynamics of Escherichia coli in a metropolitan river after an extreme flood event. J Water Health 2017; 15:196-208. [PMID: 28362301 DOI: 10.2166/wh.2016.285] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigated Escherichia coli populations in a metropolitan river after an extreme flood event. Between nine and 15 of the 23 selected sites along the river were sampled fortnightly over three rounds. In all, 307 E. coli were typed using the PhP typing method and were grouped into common (C) or single (S) biochemical phenotypes (BPTs). A representative from each of the 31 identified C-BPTs was tested for 58 virulence genes (VGs) associated with intestinal and extra-intestinal E. coli, resistance to 22 antibiotics, production of biofilm and cytotoxicity to Vero cells. The number of E. coli in the first sampling round was significantly (P < 0.01) higher than subsequent rounds, whereas the number of VGs was significantly (P < 0.05) higher in isolates from the last sampling round when compared to previous rounds. Comparison of the C-BPTs with an existing database from wastewater treatment plants (WWTPs) in the same catchment showed that 40.6% of the river isolates were identical to the WWTP isolates. The relatively high number of VGs and antibiotic resistance among the C-BPTs suggests possessing and retaining these genes may provide niche advantages for those naturalised and/or persistent E. coli populations which may pose a health risk to the community.
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Affiliation(s)
- Nicole M Masters
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Aaron Wiegand
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Jasmin M Thompson
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Tara L Vollmerhausen
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Eva Hatje
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia E-mail:
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Owrangi B, Masters N, Vollmerhausen T, O'Dea C, Kuballa A, Katouli M. Comparison between virulence characteristics of dominant and non-dominant Escherichia coli strains of the gut and their interaction with Caco-2 cells. Microb Pathog 2017; 105:171-176. [DOI: 10.1016/j.micpath.2017.02.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/21/2017] [Accepted: 02/21/2017] [Indexed: 01/14/2023]
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Talebi M, Azadegan A, Sadeghi J, Ahmadi A, Ghanei M, Katouli M, Owlia P, Pourshafie MR. Determination of Characteristics of Erythromycin Resistant Streptococcus pneumoniae with Preferred PCV Usage in Iran. PLoS One 2016; 11:e0167803. [PMID: 28033345 PMCID: PMC5199012 DOI: 10.1371/journal.pone.0167803] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 11/21/2016] [Indexed: 11/19/2022] Open
Abstract
Amongst 100 Streptococcus pneumoniae isolated from clinical cases and nasopharynx of healthy individuals, 60 erythromycin resistant strains were isolated and characterized using MLST, PFGE, transposon analysis and Quellung reaction. Most of the S. pneumoniae erythromycin resistant (80%) were found to be attributable to the ermB-edncoded ribosome methylase activity which differs from the dominant mechanism of macrolide resistance seen in North America. The most predominant transposons were; Tn1545/6003 (27%), Tn6002 (22%), Tn2009 (20%), Tn2010 (17%). Number of the clinical isolates carrying Tn2010 was more significant than the normal flora. The serotypes found were; 14 (33%), 3 (22%), 23F (15%), 19F (15%), 19A (7%), 6A (3%), 9V (3%) and 6B (2%). The most prevalent serotypes among the clinical (n = 28) and normal flora (n = 32) isolates were serotypes 14 (46%) and 3 (31%), respectively. The most prevalent vaccine serotypes amongst the clinical isolates and the healthy individuals were pneumococcal conjugate vaccines (PCV) 13 and PCV10, respectively. PFGE revealed 34 pulsotypes with 9 common and 25 single types. Significant number of the normal isolates belonged to CT5 and CT6. On the other hand, significant number of clinical isolates belonged to CT8 as compared to the normal flora isolates. MLST showed 2 dominant sequence types. ST3130 (23%) and ST180 (22%) were the most predominant sequence types in the clinical and normal isolates, respectively. There was no significant difference in other sequence types between clinical and normal flora isolates. Three polyclonal complexes including Sweden15A -25, Spain23F-1 and Spain9V-3 constituted 58% of the isolates. Our results suggest that the genetic diversity and transposon distribution were high among S. pneumoniae, particularly in the isolates containing erm(B) and double antibiotic resistant genes (erm/mef). The results presented here could influence the change in the current vaccination practices in Iran which currently calls for vaccination with PCV7 or PCV10.
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Affiliation(s)
- Malihe Talebi
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Azadeh Azadegan
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Javad Sadeghi
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Ahmadi
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mostafa Ghanei
- Tuberculosis Department, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, Queensland, Australia
| | - Parviz Owlia
- Molecular Microbiology Research Center (MMRC), Shahed University, Tehran, Iran
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Kurtböke DI, Palk A, Marker A, Neuman C, Moss L, Streeter K, Katouli M. Isolation and characterization of Enterobacteriaceae species infesting post-harvest strawberries and their biological control using bacteriophages. Appl Microbiol Biotechnol 2016; 100:8593-606. [DOI: 10.1007/s00253-016-7651-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/24/2016] [Accepted: 05/27/2016] [Indexed: 10/21/2022]
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Rahimi F, Katouli M, Karimi S. Biofilm production among methicillin resistant Staphylococcus aureus strains isolated from catheterized patients with urinary tract infection. Microb Pathog 2016; 98:69-76. [PMID: 27374894 DOI: 10.1016/j.micpath.2016.06.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 06/07/2016] [Revised: 06/27/2016] [Accepted: 06/28/2016] [Indexed: 10/21/2022]
Abstract
Between June 2011 and May 2014, we isolated a total of 419 Staphylococcus aureus strains from catheterized patients with UTI in a referral hospital in Tehran. Of these, 108 were identified as methicillin resistant (MRSA) based on their phenotypic resistance to oxacillin and the presence of mecA gene. The MRSA isolates were tested for their clonality using a combination of PFGE, prophage typing, SCCmec and ccr typing and examined for their biofilm formation as well as their resistance against 17 antibiotics. In all, 15 common pulsotypes consisted of 105 isolates and 3 single types were identified among the MRSA strains of which, 97% carried SCCmec type III and type 3 ccr. Eighty three (77%) strains were positive for biofilm formation and also carried icaA and icaD genes. Moreover, agr group III and its related tst gene were detected in 81% and 77% of biofilm producing strains, respectively 105 of the 108 MRSA were multidrug resistant with 82.4% being resistant to more than 10 antibiotics. Strains with SCCmec type IV and type 2 ccr, contained SGA and SGL prophage types, were positive for pvl gene and belonged to single PFGE types. This study highlights the important role of biofilm formation and virulence factors of MRSA strains in catheterized patients.
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Affiliation(s)
- Fateh Rahimi
- Department of Microbiology, Faculty of Science, University of Isfahan, Isfahan, Iran.
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health and Education and Engineering, University of the Sunshine Coast, Queensland, Australia
| | - Sharmin Karimi
- Department of Microbiology, Faculty of Science, University of Isfahan, Isfahan, Iran
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Streeter K, Neuman C, Thompson J, Hatje E, Katouli M. The characteristics of genetically related Pseudomonas aeruginosa from diverse sources and their interaction with human cell lines. Can J Microbiol 2016; 62:233-40. [DOI: 10.1139/cjm-2015-0536] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated a collection of Pseudomonas aeruginosa strains from hospitalised patients (n = 20) and various environmental sources (n = 214) for their genetic relatedness; virulence properties; antibiotic resistance; and interaction with intestinal (Caco-2), renal (A-498), and lung (Calu-3) cell lines. Using RAPD–PCR, we found high diversity among the strains irrespective of their sources, with only 6 common (C) types containing strains from both a clinical and environmental source. Environmental strains belonging to these C-types showed greater adhesion to A-498 cells than did clinical strains (17 ± 13 bacteria/cell versus 13 ± 11 bacteria/cell; p < 0.001), whereas clinical strains showed significantly greater adhesion to Calu-3 and Caco-2 cells than did environmental strains (p < 0.001 for both). The virulence genes and antibiotic resistance profiles of the strains were similar; however, the prevalence of environmental strains carrying both exoS and exoU was significantly (p < 0.0368) higher than clinical strains. While all strains were resistant to ticarcillin and ticarcillin–clavulanic acid, resistance against aztreonam, gentamicin, amikacin, piperacillin, and ceftazidime varied among environmental and clinical strains. These results suggest that environmental strains of P. aeruginosa carry virulence properties similar to clinical strains, including adhesion to various human cell lines, with some strains showing a higher adhesion to specific cell lines, indicating they may have a better ability to cause infection in those sites under predisposing conditions of the host.
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Affiliation(s)
- Klrissa Streeter
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
| | - Christina Neuman
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
| | - Jasmin Thompson
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
| | - Eva Hatje
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
| | - Mohammad Katouli
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
- Genecology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, 4558, Queensland, Australia
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31
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Hatje E, Minniti G, Stewart MJ, Neuman C, Knibb W, Katouli M. First description of 'Chalky back' phenomenon in banana prawns (Fenneropenaeus merguiensis) and its possible association with Vibrio and Photobacterium species. FEMS Microbiol Lett 2016; 363:fnw019. [PMID: 26825678 DOI: 10.1093/femsle/fnw019] [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] [Accepted: 01/21/2016] [Indexed: 11/13/2022] Open
Abstract
Here we report a newly identified 'Chalky back' phenomenon in banana prawns (Fenneropenaeus merguiensis) farmed in North Queensland, Australia. This was characterized by localized white discoloured segmentation of the cervical groove, moreover, after cooking the prawns exploded, making them unfit for commercial sale. Histological examination revealed breakdown of gut and abdominal muscle tissue in some moribund specimens. We selectively isolated Vibrio spp., which are known prawn pathogens, from healthy and Chalky back specimens. Isolated bacteria were identified, typed and tested for the presence of eight virulence genes (VGs), biofilm formation, adherence and cytotoxicity to fish cells. In all, 32 isolates were recovered and identified as Vibrio harveyi, V. owensii, V. sinaloensis-like, V. campbellii, V. shilonii, Vibrio sp. and Photobacterium damselae using 16S rRNA gene sequencing. All V. harveyi carried VGs coding for haemolysin, toxR and flagella; formed biofilm; and adhered to both cell lines. This was similar to the V. sinaloensis-like strains that were only isolated from Chalky back specimens. Our data suggest that Vibrio spp. may play a role in the pathogenesis of Chalky back. This study is the first report of Chalky back phenomenon in farmed banana prawns that needs to be closely monitored by the industry.
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Affiliation(s)
- Eva Hatje
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia
| | - Giusi Minniti
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia
| | - Michael J Stewart
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia
| | - Christina Neuman
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia
| | - Wayne Knibb
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia
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Rohani M, Noohi N, Talebi M, Katouli M, Pourshafie MR. Highly Heterogeneous Probiotic Lactobacillus Species in Healthy Iranians with Low Functional Activities. PLoS One 2015; 10:e0144467. [PMID: 26645292 PMCID: PMC4672925 DOI: 10.1371/journal.pone.0144467] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 11/18/2015] [Indexed: 12/21/2022] Open
Abstract
Background Lactic acid bacteria (LAB) have been considered as potentially probiotic organisms due to their potential human health properties. This study aimed to evaluate both in vitro and in vivo, the potential probiotic properties of Lactobacillus species isolated from fecal samples of healthy humans in Iran. Methods and Results A total of 470 LAB were initially isolated from 53 healthy individual and characterized to species level. Of these, 88 (86%) were Lactobacillus species. Biochemical and genetic fingerprinting with Phene-Plate system (PhP-LB) and RAPD-PCR showed that the isolates were highly diverse consisted of 67(76.1%) and 75 (85.2%) single types (STs) and a diversity indices of 0.994 and 0.997, respectively. These strains were tested for production of adhesion to Caco-2 cells, antibacterial activity, production of B12, anti-proliferative effect and interleukin-8 induction on gut epithelial cell lines and antibiotic resistance against 9 commonly used antibiotics. Strains showing the characteristics consistent with probiotic strains, were further tested for their anti-inflammatory effect in mouse colitis model. Only one L. brevis; one L. rhamnosus and two L. plantarum were shown to have significant probiotic properties. These strains showed shortening the length of colon compared to dextran sulfate sodium and disease activity index (DAI) was also significantly reduced in mouse. Conclusion Low number of LAB with potential probiotic activity as well as high diversity of lactobacilli species was evident in Iranian population. It also suggest that specific strains of L. plantarum, L. brevis and L. rhamnosus with anti-inflammatory effect in mouse model of colitis could be used as a potential probiotic candidate in inflammatory bowel disease to decrease the disease activity index.
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Affiliation(s)
- Mahdi Rohani
- Department of Microbiology, Pasteur Institute of Iran, Tehran, Iran
| | - Nasrin Noohi
- Department of Microbiology, Pasteur Institute of Iran, Tehran, Iran
| | - Malihe Talebi
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland, Australia
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Masters N, Christie M, Katouli M, Stratton H. A combination of PhP typing and β-d-glucuronidase gene sequence variation analysis for differentiation of Escherichia coli from humans and animals. Can J Microbiol 2015; 61:409-16. [PMID: 25950195 DOI: 10.1139/cjm-2015-0048] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 11/22/2022]
Abstract
We investigated the usefulness of the β-d-glucuronidase gene variance in Escherichia coli as a microbial source tracking tool using a novel algorithm for comparison of sequences from a prescreened set of host-specific isolates using a high-resolution PhP typing method. A total of 65 common biochemical phenotypes belonging to 318 E. coli strains isolated from humans and domestic and wild animals were analysed for nucleotide variations at 10 loci along a 518 bp fragment of the 1812 bp β-d-glucuronidase gene. Neighbour-joining analysis of loci variations revealed 86 (76.8%) human isolates and 91.2% of animal isolates were correctly identified. Pairwise hierarchical clustering improved assignment; where 92 (82.1%) human and 204 (99%) animal strains were assigned to their respective cluster. Our data show that initial typing of isolates and selection of common types from different hosts prior to analysis of the β-d-glucuronidase gene sequence improves source identification. We also concluded that numerical profiling of the nucleotide variations can be used as a valuable approach to differentiate human from animal E. coli. This study signifies the usefulness of the β-d-glucuronidase gene as a marker for differentiating human faecal pollution from animal sources.
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Affiliation(s)
- N Masters
- Genecology Research Centre, School of Health and Sports Science, University of the Sunshine Coast, Maroochydore, Queensland, Australia
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Masters N, Christie M, Stratton H, Katouli M. Viability and stability of Escherichia coli and enterococci populations in fecal samples upon freezing. Can J Microbiol 2015; 61:495-501. [PMID: 26053765 DOI: 10.1139/cjm-2015-0020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 01/18/2023]
Abstract
We studied the survival of Escherichia coli and enterococci populations in fecal samples of 7 host species after storage at -20 and -80 °C for 30 days. Composite fecal samples were collected from cows, chickens, horses, pigs, dogs, birds, and humans, and bacteria were enumerated before and after storage. Twenty-eight colonies of each bacterial species were typed before and after storage and the strains were assigned to different biochemical phenotypes (BPTs). A significant reduction in the number of E. coli was observed in all samples stored at -20 °C but in only 3 of those samples stored at -80 °C. However, the numbers of enterococci were similar in most stored samples (except cow and birds). The number and the distribution of E. coli and enterococci BPTs in fresh samples did not vary significantly from those stored at either temperature. Furthermore, the population structure of E. coli and enterococci did not change significantly after storage at -80 °C, this was always the case for those samples stored at -20 °C. We conclude that for those studies investigating E. coli or enterococci population structure, short-term storage (≤ 30 days) of fecal samples in a glycerol broth at -80 °C is a preferable option.
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Affiliation(s)
- N Masters
- a GeneCology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - M Christie
- b School of Biomolecular and Physical Sciences, Griffith University, Nathan, Queensland, Australia
| | - H Stratton
- b School of Biomolecular and Physical Sciences, Griffith University, Nathan, Queensland, Australia.,c Smart Water Research Centre, Griffith University, Gold Coast, Queensland, Australia
| | - M Katouli
- a GeneCology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Queensland, Australia.,c Smart Water Research Centre, Griffith University, Gold Coast, Queensland, Australia
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Bakhshi B, Ghafari M, Pourshafie MR, Zarbakhsh B, Katouli M, Rahbar M, Hajia M, Hosseini-Aliabad N, Boustanshenas M. Resistance-Gene Cassettes Associated With Salmonella enterica Genotypes. Lab Med 2015; 46:90-6. [PMID: 25918187 DOI: 10.1309/lmfn8d17sohqhgrp] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 10/23/2022] Open
Abstract
BACKGROUND The epidemiology of salmonellosis is complex because of the diversity and different serotypes of Salmonella enterica (S. enterica) that occur in different reservoirs and geographic incidences. OBJECTIVES To determine the genotype distribution and resistance-gene content of 2 classes of integron among S. enterica isolates. METHODS Thirty-six S. enterica species were isolated and tested for their serological distribution and the resistance-gene contents of 2 classes of integron, as well as for their genetic diversity, using the pulsed-field gel electrophoresis (PFGE) genotyping method. RESULTS Serogroups E (36.1%) and D (30.5%) were dominant among the isolates. All of the isolates in serogroup D belonged to the serovar enteritidis. The aadA1 gene was found within all resistance-gene cassettes. We observed 4 common and 26 single pulsotypes among the isolates, which indicated a high degree of genetic diversity among the isolates. Using the PulseNet International standard protocol, it was found that these isolates were different from those reported previously in Iran. CONCLUSIONS The presence of a few common and new pulsotypes among the isolates suggests the emergence and spread of new clones of S. enterica in Iran.
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Affiliation(s)
- Bita Bakhshi
- Department of Bacteriology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mohsen Ghafari
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Behnaz Zarbakhsh
- Department of Molecular Medicine, Pasteur Institute of Iran, Tehran
| | - Mohammad Katouli
- Department of Science, Health and Education, University of the Sunshine Coast, Queensland, Australia
| | - Mohammad Rahbar
- Department of Microbiology, Reference Health Laboratories Research Center, Ministry of Health and Medical Education, Tehran, Iran
| | - Masoud Hajia
- Department of Microbiology, Reference Health Laboratories Research Center, Ministry of Health and Medical Education, Tehran, Iran
| | - Neda Hosseini-Aliabad
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mina Boustanshenas
- Antimicrobial Resistance Research Center, Iran University of Medical Sciences, Tehran, Iran
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Nobakht M, Grkovic T, Trueman SJ, Wallace HM, Katouli M, Quinn RJ, Brooks PR. Chemical constituents of kino extract from Corymbia torelliana. Molecules 2014; 19:17862-71. [PMID: 25375331 PMCID: PMC6270844 DOI: 10.3390/molecules191117862] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 10/27/2014] [Accepted: 10/28/2014] [Indexed: 11/21/2022] Open
Abstract
Seven flavanones were identified from kino exudate of Corymbia torelliana by spectroscopic and spectrometric methods including UV, 1D and 2D NMR and UPLC-HR-MS. The study identified seven molecules, namely 3,4',5,7-tetrahydroxyflavanone (1), 3',4',5,7-tetrahydroxyflavanone (2), 4',5,7-trihydroxyflavanone (3), 3,4',5-trihydroxy-7-methoxyflavanone (4), (+)-(2S)-4',5,7-trihydroxy-6-methylflavanone (5), 4',5,7-trihydroxy-6,8-dimethylflavanone (6) and 4',5-dihydroxy-7-methoxyflavanone (7) from this eucalypt species. This is the first report of these natural products from C. torelliana kino exudate.
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Affiliation(s)
- Motahareh Nobakht
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia
| | - Tanja Grkovic
- Eskitis Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Stephen J Trueman
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia
| | - Helen M Wallace
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia
| | - Ronald J Quinn
- Eskitis Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Peter R Brooks
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland 4558, Australia.
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37
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Hatje E, Neuman C, Stevenson H, Bowman JP, Katouli M. Population dynamics of Vibrio and Pseudomonas species isolated from farmed Tasmanian Atlantic salmon (Salmo salar L.): a seasonal study. Microb Ecol 2014; 68:679-687. [PMID: 25027277 DOI: 10.1007/s00248-014-0462-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 07/04/2014] [Indexed: 06/03/2023]
Abstract
Vibrio and Pseudomonas species have been shown to be part of the normal microbiota of Atlantic salmon (Salmo salar L.), with some strains causing disease in fish. The factors affecting their prevalence and persistence in the salmon gut, however, have not been well studied. In this study, we collected 340 Vibrio and 150 Pseudomonas isolates from the hindgut of farmed Tasmanian Atlantic salmon, fed with two commercially available diets. Samples were collected every 6-8 weeks between July 2011 and May 2012. Isolates from selective agar were initially identified using biochemical tests and confirmed using genus-specific primers and 16S ribosomal RNA (16S rRNA) sequencing. Random amplified polymorphic DNA (RAPD) PCR was used to type both Pseudomonas and Vibrio; the latter was further typed using a biochemical fingerprinting method (PhP-RV plates). We observed low species diversity with strains comprising Vibrio ichthyoenteri/Vibrio scophthalmi, Vibrio crassostreae/Vibrio splendidus, Aliivibrio finisterrensis, Photobacterium phosphoreum and Pseudomonas fragi. Out of 340 Vibrio isolates, 238 (70 %) belonged to 21 clonal types and were found predominantly during summer when water temperatures reached 15 to 21 °C. Of these, the four major clonal types were found in multiple samples (70 %). P. fragi, on the other hand, was only found during the colder water temperatures and belonged to 18 clonal types. The presence of both groups of bacteria and their clonal types were independent of the fish diets used, suggesting that the water temperature was the main factor of the prevalence and persistence of these bacteria in the gut of Atlantic salmon.
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Affiliation(s)
- Eva Hatje
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
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38
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Taherzadeh M, Katouli M, Amirinejad R, Farzaneh MR, Gharibi O. A case of wound infection caused by Shewanella algae in the south of Iran. New Microbes New Infect 2014; 2:29-30. [PMID: 25356336 PMCID: PMC4184621 DOI: 10.1002/2052-2975.33] [Citation(s) in RCA: 3] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 12/02/2013] [Accepted: 12/04/2013] [Indexed: 12/19/2022] Open
Abstract
Shewanella algae was isolated from the purulent discharge in the navel area of a young male with a history of swimming in the Persian Gulf. A routine laboratory diagnosis procedure, followed by 16S rRNA gene sequence analyses, was used to avoid misidentification with other species of Shewanella. The bacterium was suscetible to ceftazidime, ciprofloxacin, nalidixic acid, nitrophorantion, amikacin, ceftriaxone, cefotaxime, gentamicin and co-trimoxazole but was resistant to amoxicillin, vancomycin, doxycycline, cephalexin, ampicillin, tetracycline, cephalothin and ceftizoxime. The patient successfully recovered after treatment with antibiotics.
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Affiliation(s)
- M Taherzadeh
- The Persian Gulf Health Research Centre Bushehr, Iran ; Bushehr University of Medical Sciences Bushehr, Iran
| | - M Katouli
- Genecology Research Centre, Faculty of Science, Health and Education, University of the Sunshine Coast Queensland, Australia
| | - R Amirinejad
- The Persian Gulf Health Research Centre Bushehr, Iran
| | - M R Farzaneh
- Bushehr University of Medical Sciences Bushehr, Iran
| | - O Gharibi
- Bushehr University of Medical Sciences Bushehr, Iran
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Vollmerhausen TL, Woods JL, Faoagali J, Katouli M. Interactions of uroseptic Escherichia coli with renal (A-498) and gastrointestinal (HT-29) cell lines. J Med Microbiol 2014; 63:1575-1583. [PMID: 25298161 DOI: 10.1099/jmm.0.076562-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We investigated the ability of Escherichia coli isolated from septic patients with urinary tract infection (UTI) to translocate through the gastrointestinal (GI) tract of the same patients using cell-culture models. Forty-seven hospitalized patients with urosepsis were included in this study. E. coli was isolated from their urine and blood (total 94 isolates) and investigated for genetic relatedness and interaction with the cell lines A-498 and HT-29. An initial comparison of the strains isolated from urine and blood showed that 44 out of 47 patients (94 %) had identical strains in their blood and urine. The blood isolates adhered to both cell lines, although their rate of adherence to A-498 cells was significantly higher than that to HT-29 cells (5.8±3.8 per cell vs 2.8±1.9; P<0.0001). The rate of translocation in A-498 cells was also significantly higher after 120 min (8.7×10(5) vs 2.9×10(5); P = 0.0006). Three non-identical blood isolates were unable to translocate in HT-29 cells, indicating that host immune factors might be more important than bacterial ability to translocate the GI epithelium in these patients. Our data showed that blood isolates from uroseptic patients are able to adhere to and translocate through both cell lines. This suggests that E. coli in patients with UTI may translocate from either the GI tract or the urinary tract, hence questioning the assumption that the urinary tract is the only source of septicaemia in these patients.
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Affiliation(s)
- Tara L Vollmerhausen
- Inflammation and Healing Research Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Australia
| | - Jasmine L Woods
- Inflammation and Healing Research Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Australia
| | - Joan Faoagali
- Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Mohammad Katouli
- Inflammation and Healing Research Cluster, School of Health and Sport Sciences, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, Australia
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Massaro CF, Smyth TJ, Smyth WF, Heard T, Leonhardt SD, Katouli M, Wallace HM, Brooks P. Phloroglucinols from Anti-Microbial Deposit-Resins of Australian Stingless Bees (Tetragonula carbonaria
). Phytother Res 2014; 29:48-58. [DOI: 10.1002/ptr.5225] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 08/07/2014] [Accepted: 08/21/2014] [Indexed: 11/08/2022]
Affiliation(s)
- C. Flavia Massaro
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Australia
| | | | - W. Franklin Smyth
- School of Pharmacy and Pharmaceutical Sciences; University of Ulster; Coleraine Northern Ireland UK
| | - Tim Heard
- CSIRO Brisbane, Ecosystem Sciences; Brisbane Australia
| | | | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Australia
| | - Helen M. Wallace
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Australia
| | - Peter Brooks
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore DC Australia
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41
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Drescher N, Wallace HM, Katouli M, Massaro CF, Leonhardt SD. Diversity matters: how bees benefit from different resin sources. Oecologia 2014; 176:943-53. [PMID: 25205030 DOI: 10.1007/s00442-014-3070-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 08/25/2014] [Indexed: 11/26/2022]
Abstract
Biodiverse environments provide a variety of resources that can be exploited by consumers. While many studies revealed a positive correlation between biodiversity and consumer biomass and richness, only few studies have investigated how resource diversity affects single consumers. To better understand whether a single consumer species benefits from diverse resources, we tested how the protective function of a defensive plant resource (i.e. resin exploited by social bees) varied among different sources and target organisms (predators, parasites and pathogens). To assess synergistic effects, resins from different plant genera were tested separately and in combination. We found that resin diversity is beneficial for bees, with its functional properties depending on the target organisms, type and composition of resin. Different resins showed different effects, and mixtures were more effective than some of the single resins (functional complementarity). We conclude that resins of different plant species target different organisms and act synergistically where combined. Bees that rely on resin for protection benefit more when they have access to diverse resin sources. Loss of biodiversity may in turn destabilize consumer populations due to restricted access to a variety of resources.
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Affiliation(s)
- Nora Drescher
- Department of Ecology, Leuphana University of Lüneburg, 21335, Lüneburg, Germany,
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Rezaee P, Kermanshahi R, Katouli M. Prebiotics Decrease the Antibacterial Effect of Nano Silver and Nano TiO<sub>2</sub> Particles Against Probiotic Bacteria of Food. CNF 2014. [DOI: 10.2174/1573401310666140306224848] [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: 11/22/2022]
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43
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Zarkasi KZ, Abell GCJ, Taylor RS, Neuman C, Hatje E, Tamplin ML, Katouli M, Bowman JP. Pyrosequencing-based characterization of gastrointestinal bacteria of Atlantic salmon (Salmo salar L.) within a commercial mariculture system. J Appl Microbiol 2014; 117:18-27. [PMID: 24698479 DOI: 10.1111/jam.12514] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [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: 01/30/2014] [Revised: 03/19/2014] [Accepted: 03/28/2014] [Indexed: 11/30/2022]
Abstract
AIMS The relationship of Atlantic salmon gastrointestinal (GI) tract bacteria to environmental factors, in particular water temperature within a commercial mariculture system, was investigated. METHODS AND RESULTS Salmon GI tract bacterial communities commercially farmed in south-eastern Tasmania were analysed, over a 13-month period across a standard commercial production farm cycle, using 454 16S rRNA-based pyrosequencing. Faecal bacterial communities were highly dynamic but largely similar between randomly selected fish. In postsmolt, the faecal bacteria population was dominated by Gram-positive fermentative bacteria; however, by midsummer, members of the family Vibrionaceae predominated. As fish progressed towards harvest, a range of different bacterial genera became more prominent corresponding to a decline in Vibrionaceae. The sampled fish were fed two different commercial diet series with slightly different protein, lipid and digestible energy level; however, the effect of these differences was minimal. CONCLUSIONS The overall data demonstrated dynamic hind gut communities in salmon that were related to season and fish growth phases but were less influenced by differences in commercial diets used routinely within the farm system studied. SIGNIFICANCE AND IMPACT OF THE STUDY This study provides understanding of farmed salmon GI bacterial communities and describes the relative impact of diet, environmental and farm factors.
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Affiliation(s)
- K Z Zarkasi
- Tasmanian Institute of Agriculture, Food Safety Centre, University of Tasmania, Hobart, Tas., Australia; School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Brinkmann CM, Neuman C, Katouli M, Kurtböke DI. Detection of thermoactinomyces species in selected agricultural substrates from Queensland. Microb Ecol 2014; 67:804-809. [PMID: 24402366 DOI: 10.1007/s00248-013-0354-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 12/12/2013] [Indexed: 06/03/2023]
Abstract
Selected overheated substrates commercially available for public use in sub-tropical Queensland, Australia were screened for the presence of Thermoactinomyces species using an air sampler. All substrates with the exception of tea tree mulch were found to contain Thermoactinomyces species. Subsequent 16S rDNA oligonucleotide sequencing of the selected eight isolates indicated that some of these species were closely related to previously reported allergenic Thermoactinomyces vulgaris and Laceyella sacchari. In view of this, the isolates were tested to determine their adhesion ability and cytotoxicity to human lung cells (calu-3 cells). The results indicated that all eight isolates were highly adherent and showed cytotoxicity to this cell line. These findings might indicate that the presence of such species in overheated agricultural materials may constitute a public health risk if storage and handling conditions are not optimal and do not meet criteria defined for sub-tropical climates.
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Affiliation(s)
- C M Brinkmann
- Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
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45
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Rahimi F, Katouli M, Pourshafie MR. Characteristics of hospital- and community-acquired meticillin-resistant Staphylococcus aureus in Tehran, Iran. J Med Microbiol 2014; 63:796-804. [PMID: 24648470 DOI: 10.1099/jmm.0.070722-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Staphylococcus aureus is a leading cause of hospital-acquired (HA) and community-acquired (CA) infections worldwide. Recently, S. aureus strains resistant to meticillin (MRSA) have become established within both communities. We isolated 314 isolates of MRSA from hospitalized patients in a referral hospital (HA isolates) and 268 isolates from its outpatient clinic (CA isolates) in Tehran, Iran, between February 2008 and December 2010. These isolates were tested for their susceptibility to 17 antibiotics and typed using the PhPlate system. The diversity in the structures of staphylococcal cassette chromosome mec (SCCmec) elements and ccr types was also detected using a multiplex-PCR assay and isolates were examined for the presence of different classes of prophages. Whilst all isolates were resistant to penicillin, the HA isolates were significantly more resistant to all other antibiotics tested than the CA isolates. Isolates carrying only SCCmec type III and ccr type 3 were dominant (91 %), but 20 % of the CA isolates belonging to less prevalent types carried only SCCmec types IVa, c and ccr type 2. These isolates also carried pvl genes and contained SGA prophage type. Our results indicate that whilst the dominant clonal groups of HA- and CA-MRSA belong to SCCmec type III and carry ccr type 3 genes, several distinct but less prevalent types of CA-MRSA carrying SCCmec type IVa, c and type 2 ccr are also found in Tehran. These strains carry pvl genes and the SGA prophage type, a characteristic that might be used as a marker for detection of CA-MRSA in this country.
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Affiliation(s)
- Fateh Rahimi
- Department of Microbiology, Faculty of Science, University of Isfahan, Iran
| | - Mohammad Katouli
- Genecology Research Centre, Faculty of Science, Health and Education and Engineering, University of the Sunshine Coast, Queensland, Australia
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Anastasi EM, Wohlsen TD, Stratton HM, Katouli M. Survival of Escherichia coli in two sewage treatment plants using UV irradiation and chlorination for disinfection. Water Res 2013; 47:6670-6679. [PMID: 24091189 DOI: 10.1016/j.watres.2013.09.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 07/24/2013] [Accepted: 09/01/2013] [Indexed: 06/02/2023]
Abstract
We investigated the survival of Escherichia coli in two STPs utilising UV irradiation (STP-A) or chlorination (STP-B) for disinfection. In all, 370 E. coli strains isolated from raw influent sewage (IS), secondary treated effluent (STE) and effluent after the disinfection processes of both STPs were typed using a high resolution biochemical fingerprinting method and were grouped into common (C-) and single (S-) biochemical phenotypes (BPTs). In STP-A, 83 BPTs comprising 123 isolates were found in IS and STE, of which 7 BPTs survived UV irradiation. Isolates tested from the same sites of STP-B (n = 220) comprised 122 BPTs, however, only two BPTs were found post-chlorination. A representative isolate from each BPT from both STPs was tested for the presence of 11 virulence genes (VGs) associated with uropathogenic (UPEC) or intestinal pathogenic (IPEC) E. coli strains. Strains surviving UV irradiation were distributed among seven phylogenetic groups with five BPTs carrying VGs associated with either UPEC (4 BPTs) or IPEC (1 BPT). In contrast, E. coli strains found in STP-B carried no VGs. Strains from both STPs were resistant to up to 12 out of the 21 antibiotics tested but there was no significant difference between the numbers of antibiotics to which surviving strains were resistant to in these STPs. Our data suggests that some E. coli strains have a better ability to survive STPs utilising chlorination and UV irradiation for disinfection. However, strains that survive UV irradiation are more diverse and may carry more VGs than those surviving SPTs using chlorination.
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Affiliation(s)
- E M Anastasi
- Faculty of Science, Health and Education, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia; Smart Water Research Centre, Griffith University, Gold Coast Campus, Queensland, Australia
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Gündoğdu A, Jennison AV, Smith HV, Stratton H, Katouli M. Extended-spectrum β-lactamase producing Escherichia coli in hospital wastewaters and sewage treatment plants in Queensland, Australia. Can J Microbiol 2013; 59:737-45. [PMID: 24206356 DOI: 10.1139/cjm-2013-0515] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the prevalence of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli in untreated hospital wastewaters and 2 sewage treatment plants (STPs). A collection of 252 ESBL-producing E. coli isolates from hospital wastewater and STPs were typed and tested for resistance to 17 antimicrobial agents and for the presence of integron-associated integrases (intI gene) and ESBL genes. Eighty-nine percent (n = 176) of the ESBL-producing E. coli strains from hospital wastewater were found in more than 1 sample (common types), with 1 common type accounting for 35% of isolates, found in all samples. These strains were also resistant to up to 9 non-β-lactam antibiotics and showed the same pattern of resistance in all samples. More than 73% of the hospital wastewater isolates possessed SHV-type ESBL as opposed to isolates from STPs that carried only CTX-M-type ESBL genes. The prevalence of the intI gene did not differ between the sources of the isolates. Certain ESBL-producing E. coli were dominant in hospital wastewaters. These strains possessed β-lactamase genes that were different from isolates found in STPs. From a public health point of view, the presence of such a high level of ESBL-producing E. coli strains in hospital wastewaters is of great importance.
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Affiliation(s)
- Aycan Gündoğdu
- a GeneCology Research Centre, School of Health and Sport Sciences, Faculty of Science, Health and Education, University of the Sunshine Coast, Maroochydore DC 4558, Queensland, Australia
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Javidnia S, Talebi M, Saifi M, Katouli M, Rastegar Lari A, Pourshafie MR. Clonal dissemination of methicillin-resistant Staphylococcus aureus in patients and the hospital environment. Int J Infect Dis 2013; 17:e691-5. [DOI: 10.1016/j.ijid.2013.01.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 01/08/2013] [Accepted: 01/25/2013] [Indexed: 11/29/2022] Open
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Thompson J, Gündoğdu A, Stratton H, Katouli M. Antibiotic resistant Staphylococcus aureus
in hospital wastewaters and sewage treatment plants with special reference to methicillin-resistant Staphylococcus aureus
(MRSA). J Appl Microbiol 2012; 114:44-54. [DOI: 10.1111/jam.12037] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 09/22/2012] [Accepted: 09/23/2012] [Indexed: 01/19/2023]
Affiliation(s)
- J.M. Thompson
- Faculty of Science, Health and Education; University of the Sunshine Coast; Maroochydore QLD Australia
| | - A. Gündoğdu
- Faculty of Science, Health and Education; University of the Sunshine Coast; Maroochydore QLD Australia
| | - H.M. Stratton
- School of Biomolecular and Physical Sciences; Griffith University; Nathan Campus; Brisbane QLD Australia
- Smart Water Research Centre; Southport QLD Australia
| | - M. Katouli
- School of Biomolecular and Physical Sciences; Griffith University; Nathan Campus; Brisbane QLD Australia
- Smart Water Research Centre; Southport QLD Australia
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Gündoğdu A, Long YB, Katouli M. Prevalence and pathogenesis of extended-spectrum beta-lactamase producing Escherichia coli causing urinary tract infection in hospitalized patients. Eur J Clin Microbiol Infect Dis 2012; 31:3107-16. [PMID: 22729655 DOI: 10.1007/s10096-012-1672-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Accepted: 06/01/2012] [Indexed: 11/24/2022]
Abstract
A total of 296 E. coli strains isolated from hospitalized patients with urinary tract infection were included in this study. These strains were tested for their resistance to 22 antimicrobial drugs and the presence of ESBLs genes coding for TEM, SHV, OXA, and CTX-M. We further characterized them for their interaction with a renal cell line (A-498) and a gastrointestinal cell line (Caco-2). Strains were also typed using a combination of RAPD-PCR, PhP-typing and phylogenetic grouping. Only eight strains (2.7 %) were confirmed as ESBLs producers. The most common clonal type contained 35 isolates and only two of them were ESBLs producers and both showed a high degree of adhesion to both cell lines but only one was able to translocate in Caco-2 cells. These strains belonged to phylogenetic group B2, were resistant to nine antibiotics and carried CTX-M-type of ESBL. The remaining six strains belonged to single clones with different phylogenetic groups and ESBL genotypes and were resistant to between 12 and 15 antibiotics. They also showed a high rate of adhesion to A-498 cells (19 ± 2 to 35 ± 3 CFU/cell) and all translocated in this cell line. The rate of adhesion of ESBL-producing strains to Caco-2 cells (11 ± 3.4 CFU/cell) was significantly lower than A-498 cells (26 ± 8 CFU/cell) (p = 0.0002) and only four of them translocated in Caco-2 cells. Our results suggest that the ESBL-producing clones of E. coli have a potential to translocate and cause septicemia in hospitalized patients with UTI.
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Affiliation(s)
- A Gündoğdu
- Faculty of Science, Health and Education, University of the Sunshine Coast, Queensland, Maroochydore DC, 4558, Australia
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