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  1. Article ; Online: Zoonotic Ancylostomiasis: An Update of a Continually Neglected Zoonosis.

    Stracke, Katharina / Jex, Aaron R / Traub, Rebecca J

    The American journal of tropical medicine and hygiene

    2020  Volume 103, Issue 1, Page(s) 64–68

    Abstract: Hookworm infections are classified as the most impactful of the human soil-transmitted helminth (STH) infections, causing a disease burden of ∼4 million disability-adjusted life years, with a global prevalence of 406-480 million infections. Until a ... ...

    Abstract Hookworm infections are classified as the most impactful of the human soil-transmitted helminth (STH) infections, causing a disease burden of ∼4 million disability-adjusted life years, with a global prevalence of 406-480 million infections. Until a decade ago, epidemiological surveys largely assumed
    MeSH term(s) Ancylostoma/isolation & purification ; Ancylostoma/pathogenicity ; Ancylostomiasis/diagnosis ; Ancylostomiasis/epidemiology ; Ancylostomiasis/parasitology ; Ancylostomiasis/transmission ; Animals ; Asia, Southeastern/epidemiology ; Dog Diseases/diagnosis ; Dog Diseases/epidemiology ; Dog Diseases/parasitology ; Dog Diseases/transmission ; Dogs ; Feces/parasitology ; Humans ; Neglected Diseases/diagnosis ; Neglected Diseases/epidemiology ; Neglected Diseases/parasitology ; One Health/legislation & jurisprudence ; Pacific Islands/epidemiology ; Parasite Egg Count ; Zoonoses/diagnosis ; Zoonoses/epidemiology ; Zoonoses/parasitology ; Zoonoses/transmission
    Language English
    Publishing date 2020-04-23
    Publishing country United States
    Document type Journal Article ; Systematic Review
    ZDB-ID 2942-7
    ISSN 1476-1645 ; 0002-9637
    ISSN (online) 1476-1645
    ISSN 0002-9637
    DOI 10.4269/ajtmh.20-0060
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Conservation, abundance, glycosylation profile, and localization of the TSP protein family in Cryptosporidium parvum.

    John, Alan / M Bader, Stefanie / Madiedo Soler, Niccolay / Wiradiputri, Kharizta / Tichkule, Swapnil / Smyth, Sean T / Ralph, Stuart A / Jex, Aaron R / Scott, Nichollas E / Tonkin, Christopher J / Goddard-Borger, Ethan D

    The Journal of biological chemistry

    2023  Volume 299, Issue 3, Page(s) 103006

    Abstract: Cryptosporidium parvum is a zoonotic apicomplexan parasite and a common cause of diarrheal disease worldwide. The development of vaccines to prevent or limit infection remains an important goal for tackling cryptosporidiosis. At present, the only ... ...

    Abstract Cryptosporidium parvum is a zoonotic apicomplexan parasite and a common cause of diarrheal disease worldwide. The development of vaccines to prevent or limit infection remains an important goal for tackling cryptosporidiosis. At present, the only approved vaccine against any apicomplexan parasite targets a conserved adhesin possessing a thrombospondin repeat domain. C. parvum possesses 12 orthologous thrombospondin repeat domain-containing proteins known as CpTSP1-12, though little is known about these potentially important antigens. Here, we explore the architecture and conservation of the CpTSP protein family, as well as their abundance at the protein level within the sporozoite stage of the life cycle. We examine the glycosylation states of these proteins using a combination of glycopeptide enrichment techniques to demonstrate that these proteins are modified with C-, O-, and N-linked glycans. Using expansion microscopy, and an antibody against the C-linked mannose that is unique to the CpTSP protein family within C. parvum, we show that these proteins are found both on the cell surface and in structures that resemble the secretory pathway of C. parvum sporozoites. Finally, we generated a polyclonal antibody against CpTSP1 to show that it is found at the cell surface and within micronemes, in a pattern reminiscent of other apicomplexan motility-associated adhesins, and is present both in sporozoites and meronts. This work sheds new light on an understudied family of C. parvum proteins that are likely to be important to both parasite biology and the development of vaccines against cryptosporidiosis.
    MeSH term(s) Animals ; Humans ; Cryptosporidium parvum/metabolism ; Cryptosporidiosis/parasitology ; Cryptosporidiosis/prevention & control ; Glycosylation ; Cryptosporidium/metabolism ; Protozoan Proteins/chemistry ; Sporozoites ; Thrombospondins/metabolism
    Chemical Substances Protozoan Proteins ; Thrombospondins
    Language English
    Publishing date 2023-02-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    DOI 10.1016/j.jbc.2023.103006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Sequence diversity and evolution of a group of iflaviruses associated with ticks.

    Daveu, Romain / Hervet, Caroline / Sigrist, Louane / Sassera, Davide / Jex, Aaron / Labadie, Karine / Aury, Jean-Marc / Plantard, Olivier / Rispe, Claude

    Archives of virology

    2021  Volume 166, Issue 7, Page(s) 1843–1852

    Abstract: We studied a group of tick-associated viruses with characteristics of members of the family Iflaviridae, a family of viruses frequently found in arthropods. Our aim was to gain insight into the evolutionary dynamics of this group of viruses, which may be ...

    Abstract We studied a group of tick-associated viruses with characteristics of members of the family Iflaviridae, a family of viruses frequently found in arthropods. Our aim was to gain insight into the evolutionary dynamics of this group of viruses, which may be linked to the biology of ticks. We explored assembled RNA-Seq data sets for different species of ticks. We identified members of five different iflavirus species, four of them novel, and discovered nine new genome sequences, including variants. Five variants represented a virus species associated with Ixodes ricinus. Unexpectedly, a sequence found in the Ixodes scapularis cell line ISE6 was nearly identical to the sequences of I. ricinus variants, suggesting a contamination of this cell line by I. ricinus material. Analysing patterns of substitutions between these variants, we detected a strong excess of synonymous mutations, suggesting evolution under strong positive selection. The phylogenies of the viruses and of their tick hosts were not congruent, suggesting recurrent host changes across tick genera during their evolution. Overall, our work constitutes a step in the understanding of the interactions between this family of viruses and ticks.
    MeSH term(s) Animals ; Biological Evolution ; Cell Line ; Genome, Viral/genetics ; Mutation/genetics ; Phylogeny ; Ticks/virology ; Viruses/genetics
    Language English
    Publishing date 2021-04-19
    Publishing country Austria
    Document type Journal Article
    ZDB-ID 7491-3
    ISSN 1432-8798 ; 0304-8608
    ISSN (online) 1432-8798
    ISSN 0304-8608
    DOI 10.1007/s00705-021-05060-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Asynchronous generation of oil droplets using a microfluidic flow focusing system.

    Thurgood, Peter / Baratchi, Sara / Arash, Aram / Pirogova, Elena / Jex, Aaron R / Khoshmanesh, Khashayar

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 10600

    Abstract: Here, we show that long-term exposure of PDMS based microfluidic droplet generation systems to water can reverse their characteristics such that they generate oil-in-water droplets instead of water-in-oil droplets. The competition between two oil columns ...

    Abstract Here, we show that long-term exposure of PDMS based microfluidic droplet generation systems to water can reverse their characteristics such that they generate oil-in-water droplets instead of water-in-oil droplets. The competition between two oil columns entering via the two side channels leads to asynchronous generation of oil droplets. We identify various modes of droplet generation, and study the size, gap and generation rate of droplets under different combinations of oil and water pressures. Oil droplets can also be generated using syringe pumps, various oil viscosities, and different combinations of immiscible liquids. We also demonstrate the ability to dynamically change the gap between the oil droplets from a few hundred microns to just a few microns in successive cycles using a latex balloon pressure pump. This method requires no special equipment or chemical treatments, and importantly can be reversed by long-term exposure of the PDMS surfaces to the ambient air.
    Language English
    Publishing date 2019-07-22
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-47078-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Coronary microvascular function and visceral adiposity in patients with normal body weight and type 2 diabetes.

    Chowdhary, Amrit / Thirunavukarasu, Sharmaine / Jex, Nicholas / Coles, Lauren / Bowers, Charles / Sengupta, Anshuman / Swoboda, Peter / Witte, Klaus / Cubbon, Richard / Xue, Hui / Kellman, Peter / Greenwood, John / Plein, Sven / Levelt, Eylem

    Obesity (Silver Spring, Md.)

    2022  Volume 30, Issue 5, Page(s) 1079–1090

    Abstract: Objective: This study sought to assess whether diabetes affects coronary microvascular function in individuals with normal body weight.: Methods: Seventy-five participants (30 patients with type 2 diabetes [T2D] who were overweight [O-T2D], 15 ... ...

    Abstract Objective: This study sought to assess whether diabetes affects coronary microvascular function in individuals with normal body weight.
    Methods: Seventy-five participants (30 patients with type 2 diabetes [T2D] who were overweight [O-T2D], 15 patients with T2D who were lean [LnT2D], 15 healthy volunteers who were lean [LnHV], and 15 healthy volunteers who were overweight [O-HV]) without established cardiovascular disease were recruited. Participants underwent magnetic resonance imaging for assessment of subcutaneous, epicardial, and visceral adipose tissue areas, adenosine stress myocardial blood flow (MBF), and cardiac structure and function.
    Results: Stress MBF was reduced only in the O-T2D group (mean [SD], LnHV = 2.07 [0.47] mL/g/min, O-HV = 2.08 [0.42] mL/g/min, LnT2D = 2.16 [0.36] mL/g/min, O-T2D = 1.60 [0.28] mL/g/min; p ≤ 0.0001). Accumulation of visceral fat was evident in the LnT2D group at similar levels to the O-HV group (LnHV = 127 [53] cm
    Conclusions: Patients with T2D and normal body weight do not show alterations in global stress MBF, but they do show significant increases in visceral adiposity. Patients with T2D who were overweight and had no prior cardiovascular disease showed an increase in visceral adiposity and significant reductions in stress MBF.
    MeSH term(s) Adiposity ; Cardiovascular Diseases ; Diabetes Mellitus, Type 2/complications ; Humans ; Ideal Body Weight ; Obesity, Abdominal/complications ; Obesity, Abdominal/diagnostic imaging ; Overweight/complications ; Stroke Volume ; Ventricular Function, Left
    Language English
    Publishing date 2022-03-31
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2230457-5
    ISSN 1930-739X ; 1071-7323 ; 1930-7381
    ISSN (online) 1930-739X
    ISSN 1071-7323 ; 1930-7381
    DOI 10.1002/oby.23413
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  6. Article ; Online: Tunable Harmonic Flow Patterns in Microfluidic Systems through Simple Tube Oscillation.

    Thurgood, Peter / Suarez, Sergio Aguilera / Pirogova, Elena / Jex, Aaron R / Peter, Karlheinz / Baratchi, Sara / Khoshmanesh, Khashayar

    Small (Weinheim an der Bergstrasse, Germany)

    2020  Volume 16, Issue 43, Page(s) e2003612

    Abstract: Generation of tunable harmonic flows at low cost in microfluidic systems is a persistent and significant obstacle to this field, substantially limiting its potential to address major scientific questions and applications. This work introduces a simple ... ...

    Abstract Generation of tunable harmonic flows at low cost in microfluidic systems is a persistent and significant obstacle to this field, substantially limiting its potential to address major scientific questions and applications. This work introduces a simple and elegant way to overcome this obstacle. Harmonic flow patterns can be generated in microfluidic structures by simply oscillating the inlet tubes. Complex rib and vortex patterns can be dynamically modulated by changing the frequency and magnitude of tube oscillation and the viscosity of liquid. Highly complex rib patterns and synchronous vortices can be generated in serially connected microfluidic chambers. Similar dynamic patterns can be generated using whole or diluted blood samples without damaging the sample. This method offers unique opportunities for studying complex fluids and soft materials, chemical synthesis of various compounds, and mimicking harmonic flows in biological systems using compact, tunable, and low-cost devices.
    Keywords covid19
    Language English
    Publishing date 2020-10-01
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1613-6829
    ISSN (online) 1613-6829
    DOI 10.1002/smll.202003612
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Generation of programmable dynamic flow patterns in microfluidics using audio signals.

    Thurgood, Peter / Concilia, Gianmarco / Tran, Nhiem / Nguyen, Ngan / Hawke, Adam J / Pirogova, Elena / Jex, Aaron R / Peter, Karlheinz / Baratchi, Sara / Khoshmanesh, Khashayar

    Lab on a chip

    2021  Volume 21, Issue 23, Page(s) 4672–4684

    Abstract: Customised audio signals, such as musical notes, can be readily generated by audio software on smartphones and played over audio speakers. Audio speakers translate electrical signals into the mechanical motion of the speaker cone. Coupling the inlet tube ...

    Abstract Customised audio signals, such as musical notes, can be readily generated by audio software on smartphones and played over audio speakers. Audio speakers translate electrical signals into the mechanical motion of the speaker cone. Coupling the inlet tube to the speaker cone causes the harmonic oscillation of the tube, which in turn changes the velocity profile and flow rate. We employ this strategy for generating programmable dynamic flow patterns in microfluidics. We show the generation of customised rib and vortex patterns through the application of multi-tone audio signals in water-based and whole blood samples. We demonstrate the precise capability to control the number and extent of the ribs and vortices by simply setting the frequency ratio of two- and three-tone audio signals. We exemplify potential applications of tube oscillation for studying the functional responses of circulating immune cells under pathophysiological shear rates. The system is programmable, compact, low-cost, biocompatible, and durable. These features make it suitable for a variety of applications across chemistry, biology, and physics.
    MeSH term(s) Microfluidics ; Software
    Language English
    Publishing date 2021-11-25
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2056646-3
    ISSN 1473-0189 ; 1473-0197
    ISSN (online) 1473-0189
    ISSN 1473-0197
    DOI 10.1039/d1lc00568e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Field evaluation of the gut microbiome composition of pre-school and school-aged children in Tha Song Yang, Thailand, following oral MDA for STH infections.

    Stracke, Katharina / Adisakwattana, Poom / Phuanukoonnon, Suparat / Yoonuan, Tippayarat / Poodeepiyasawat, Akkarin / Dekumyoy, Paron / Chaisiri, Kittipong / Roth Schulze, Alexandra / Wilcox, Stephen / Karunajeewa, Harin / Traub, Rebecca J / Jex, Aaron R

    PLoS neglected tropical diseases

    2021  Volume 15, Issue 7, Page(s) e0009597

    Abstract: Soil-transmitted helminths, such as roundworms (Ascaris lumbricoides), whipworms (Trichuris trichiura) and hookworms (Necator americanus and Ancylostoma spp.), are gastrointestinal parasites that occur predominantly in low- to middle-income countries ... ...

    Abstract Soil-transmitted helminths, such as roundworms (Ascaris lumbricoides), whipworms (Trichuris trichiura) and hookworms (Necator americanus and Ancylostoma spp.), are gastrointestinal parasites that occur predominantly in low- to middle-income countries worldwide and disproportionally impact children. Depending on the STH species, health status of the host and infection intensity, direct impacts of these parasites include malnutrition, anaemia, diarrhoea and physical and cognitive stunting. The indirect consequences of these infections are less well understood. Specifically, gastrointestinal infections may exert acute or chronic impacts on the natural gut microfauna, leading to increased risk of post-infectious gastrointestinal disorders, and reduced gut and overall health through immunomodulating mechanisms. To date a small number of preliminary studies have assessed the impact of helminths on the gut microbiome, but these studies are conflicting. Here, we assessed STH burden in 273 pre-school and school-aged children in Tha Song Yang district, Tak province, Thailand receiving annual oral mebendazole treatment. Ascaris lumbricoides (107/273) and Trichuris trichiura (100/273) were the most prevalent species and often occurred as co-infections (66/273). Ancylostoma ceylanicum was detected in a small number of children as well (n = 3). All of these infections were of low intensity (<4,999 or 999 eggs per gram for Ascaris and Trichuris respectively). Using this information, we characterised the baseline gut microbiome profile and investigated acute STH-induced alterations, comparing infected with uninfected children at the time of sampling. We found no difference between these groups in bacterial alpha-diversity, but did observe differences in beta-diversity and specific differentially abundant OTUs, including increased Akkermansia muciniphila and Bacteroides coprophilus, and reduced Bifidobacterium adolescentis, each of which have been previously implicated in STH-associated changes in the gut microfauna.
    MeSH term(s) Anthelmintics/administration & dosage ; Anthelmintics/therapeutic use ; Child ; Child, Preschool ; Feces/parasitology ; Female ; Gastrointestinal Microbiome/drug effects ; Helminthiasis/drug therapy ; Helminthiasis/epidemiology ; Humans ; Male ; Mass Drug Administration ; Mebendazole/administration & dosage ; Mebendazole/therapeutic use ; Soil/parasitology ; Thailand/epidemiology
    Chemical Substances Anthelmintics ; Soil ; Mebendazole (81G6I5V05I)
    Language English
    Publishing date 2021-07-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2727
    ISSN (online) 1935-2735
    ISSN 1935-2727
    DOI 10.1371/journal.pntd.0009597
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Effective low-cost preservation of human stools in field-based studies for helminth and microbiota analysis.

    Stracke, Katharina / Adisakwattana, Poom / Phuanukoonnon, Suparat / Yoonuan, Tippayarat / Poodeepiyasawat, Akkarin / Dekumyoy, Paron / Chaisiri, Kittipong / Roth Schulze, Alexandra / Wilcox, Stephen / Karunajeewa, Harin / Traub, Rebecca J / Jex, Aaron R

    International journal for parasitology

    2021  Volume 51, Issue 9, Page(s) 741–748

    Abstract: Molecular studies of gastrointestinal infections or microbiotas require either rapid sample processing or effective interim preservation. This is difficult in remote settings in low-income countries, where the majority of the global infectious disease ... ...

    Abstract Molecular studies of gastrointestinal infections or microbiotas require either rapid sample processing or effective interim preservation. This is difficult in remote settings in low-income countries, where the majority of the global infectious disease burden exists. Processing or freezing of samples immediately upon collection is often not feasible and the cost of commercial preservatives is prohibitive. We compared fresh freezing (the 'gold standard' method), with low-cost chemical preservation in (i) a salt-based buffer consisting of DMSO, EDTA and NaCl (DESS) or (ii) 2.5% potassium dichromate (PD), for soil-transmitted helminth detection and microbiota characterisation in pre-school and school-aged children from north-western Thailand. Fresh frozen samples were frozen at -20°C on collection and maintained at -80°C within ~3 days of collection until molecular analysis, with international shipping on dry ice. In contrast, chemically preserved samples were collected and stored at ~4°C, transported on wet ice and only stored at -20°C on arrival in Australia ~8 weeks after collection, with international shipping on wet ice. DESS and PD provided better sensitivity for STH diagnosis, estimating higher infection rates (>80% for Ascaris lumbricoides and >60% for Trichuris trichiura; versus 56% and 15% for these parasites in fresh frozen samples) and egg abundance (inferred as gene copy number estimates). All methods performed similarly for microbiota preservation, showing no significant differences in alpha-diversity based on overall richness or inverted Simpson's Index. All three methods performed similarly for RNA and protein preservation in a small subset of samples. Overall, DESS provided the best performance, with the added benefit of being non-toxic, compared with PD, hence making it particularly applicable for studies in remote and resource-poor settings.
    MeSH term(s) Animals ; Child ; Feces ; Helminths ; Humans ; Microbiota ; Soil ; Trichuris
    Chemical Substances Soil
    Language English
    Publishing date 2021-03-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120518-3
    ISSN 1879-0135 ; 0020-7519
    ISSN (online) 1879-0135
    ISSN 0020-7519
    DOI 10.1016/j.ijpara.2021.01.002
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  10. Article ; Online: Self-sufficient, low-cost microfluidic pumps utilising reinforced balloons.

    Thurgood, Peter / Suarez, Sergio Aguilera / Chen, Sheng / Gilliam, Christopher / Pirogova, Elena / Jex, Aaron R / Baratchi, Sara / Khoshmanesh, Khashayar

    Lab on a chip

    2019  Volume 19, Issue 17, Page(s) 2885–2896

    Abstract: Here, we introduce a simple method for increasing the inflation pressure of self-sufficient pressure pumps made of latex balloons. Our method involves reinforcing the latex balloon with elastane fibres to restrict the expansion of the balloon and ... ...

    Abstract Here, we introduce a simple method for increasing the inflation pressure of self-sufficient pressure pumps made of latex balloons. Our method involves reinforcing the latex balloon with elastane fibres to restrict the expansion of the balloon and increase its inflation pressure. This allowed us to increase the operational inflation pressure of a latex balloon from 2.5 to 25 kPa. Proof-of-concept experiments show the suitability of the reinforced balloon for inducing lateral forces and recirculating flows, which are employed for hydrodynamic capturing of large human monocytes. We also demonstrate the ability for the rapid exchange of solutions in repeated cycles upon manual squeezing of the reinforced balloons. We also show the suitability of the reinforced balloon for studying the mechanobiology of human aortic endothelial cells under various shear stress levels. The simplicity, portability, affordability, hyper-elasticity and scalability of the reinforced balloon pumps make them suitable for a wide range of microfluidic applications.
    Language English
    Publishing date 2019-07-29
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2056646-3
    ISSN 1473-0189 ; 1473-0197
    ISSN (online) 1473-0189
    ISSN 1473-0197
    DOI 10.1039/c9lc00618d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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