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  1. Article ; Online: Multi‐antibiotics resistance phenotype of pathogenic Vibrio parahaemolyticus isolated from acute hepatopancreatic necrosis disease in Litopenaeus vannamei farmed in the Mekong Delta

    Ha, Pham Thi Hai / Thi, Quach Van Cao / Thuy, Nguyen Phuong / Luan, Nguyen Thanh

    Journal of the World Aquaculture Society. 2023 Aug., v. 54, no. 4 p.1070-1087

    2023  

    Abstract: Vibrio parahaemolyticus is a significant causal agent of acute hepatopancreatic necrosis disease (AHPND), with huge production losses of white leg shrimp, Litopenaeus vannamei, cultivated globally, including aquaculture farms in the Mekong Delta of ... ...

    Abstract Vibrio parahaemolyticus is a significant causal agent of acute hepatopancreatic necrosis disease (AHPND), with huge production losses of white leg shrimp, Litopenaeus vannamei, cultivated globally, including aquaculture farms in the Mekong Delta of Vietnam. Controlling this disease is critical because of the worldwide expansion of antimicrobial‐resistant V. parahaemolyticus isolates. The purpose of this study was to determine the frequency of multi‐antibiotic resistance (MAR) in V. parahaemolyticus isolated from AHPND white leg shrimp extensively cultivated in Bac Lieu Province (Mekong Delta). Based on biochemical tests and toxR‐PCR positive detections, 34 V. parahaemolyticus isolates were identified. Antibiotic susceptibility examination revealed that most of the isolates were phenotypically multidrug resistant, including resistance to ceftazidime (100%) and amoxicillin (97.06%), followed by colistin (74%) and erythromycin (65%). These isolates were highly sensitive to doxycycline (94%), followed by florfenicol (74%) and flumequine (71%). There were 27 distinct MAR phenotypes detected among 34 isolates, with 14.71% of the isolates exhibiting the antibiotic profile AMO‐CEF‐CEP‐COL‐ERY, followed by 11.76% for each of the profiles AMO‐CEP‐TET‐COL and AMO–CEP–COL. In particular, 25 isolates (75%) were resistant to at least 5 (of the 12) antibiotics tested. A hierarchical clustering analysis of antibiotic‐resistant V. parahaemolyticus isolates indicated cross‐transmission across farms and its ability to survive in aquatic environments for extended periods (over 3 months). Our findings support the hypothesis that the variety of MARPs in V. parahaemolyticus is the result of human activities. Environmentally friendly therapy strategies should be used for the prophylaxis and treatment of V. parahaemolyticus infection.
    Keywords Litopenaeus vannamei ; Vibrio parahaemolyticus ; amoxicillin ; antibiotic resistance ; aquaculture ; ceftazidime ; colistin ; disease prevention ; doxycycline ; erythromycin ; florfenicol ; flumequine ; humans ; multiple drug resistance ; necrotizing hepatopancreatitis ; phenotype ; river deltas ; shrimp ; therapeutics ; Vietnam
    Language English
    Dates of publication 2023-08
    Size p. 1070-1087.
    Publishing place Wiley Subscription Services, Inc.
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 2233509-2
    ISSN 1749-7345 ; 0893-8849
    ISSN (online) 1749-7345
    ISSN 0893-8849
    DOI 10.1111/jwas.12945
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Effects of antibiotics on Vietnam koi, Anabas testudineus, exposed to Aeromonas dhakensis as a co-infection

    Ha Pham Thi, Hai / Pham, Minh Quan / Tran, Quoc Toan / Pham, Quoc Long / Tran, Kien Cuong / Bach, Long Giang / Nguyen, Thanh Luan

    Acta tropica. 2022 Feb., v. 226

    2022  

    Abstract: The dietary effects of antibiotics on aquatic disease is circumstantial and has not been investigated under infections. the efficacy of erythromycin, after 10 days in use and 10 days off, on the survival and infection rate of (Anabas testudineus) after ... ...

    Abstract The dietary effects of antibiotics on aquatic disease is circumstantial and has not been investigated under infections. the efficacy of erythromycin, after 10 days in use and 10 days off, on the survival and infection rate of (Anabas testudineus) after co-infection with antibiotic-resistant Aeromonas dhakensis (isolate NV5M or V7L). The mortality rate observed in non-medicated groups of co-infected fish (93.3 and 100%) was significantly higher (p < 0.05) than that in the medicated group of naturally infected fish (NIF) (53.3%) but not significantly different to that in medicated groups of co-infected fish (66.6% and 86.6%). In particular, the loads of invasive erythromycin-resistant bacteria (ERB) were markedly higher (p < 0.05, 3.5–4.8 times) in the kidney of co-infected fish medicated for 5 days than those in NIF. The measure of ERB in the kidney of fish co-infected with isolate V7L, whether medicated or not for 10 days, was significantly higher (p < 0.05) than that in non-medicated NIF and also that in the medicated group of fish co-infected with isolate NV5M. In addition to the elevation of gut-derived ERB invasion and colonization in the kidney, synergistic effects of the competition between mixed pathogens caused by co-infection and medication might result in a high fish mortality rate. Further investigation of antibiograms and/or new strategies for aquatic disease control should be undertaken with mixed infections and interaction of pathogens to achieve the optimal treatment effect.
    Keywords Aeromonas ; Anabas testudineus ; antibiotic resistance ; disease control ; drug therapy ; erythromycin ; kidneys ; koi ; mixed infection ; mortality ; Vietnam
    Language English
    Dates of publication 2022-02
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 210415-5
    ISSN 1873-6254 ; 0001-706X
    ISSN (online) 1873-6254
    ISSN 0001-706X
    DOI 10.1016/j.actatropica.2021.106281
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Effects of antibiotics on Vietnam koi, Anabas testudineus, exposed to Aeromonas dhakensis as a co-infection.

    Ha Pham Thi, Hai / Pham, Minh Quan / Tran, Quoc Toan / Pham, Quoc Long / Tran, Kien Cuong / Bach, Long Giang / Nguyen, Thanh Luan

    Acta tropica

    2021  Volume 226, Page(s) 106281

    Abstract: The dietary effects of antibiotics on aquatic disease is circumstantial and has not been investigated under infections. the efficacy of erythromycin, after 10 days in use and 10 days off, on the survival and infection rate of (Anabas testudineus) after ... ...

    Abstract The dietary effects of antibiotics on aquatic disease is circumstantial and has not been investigated under infections. the efficacy of erythromycin, after 10 days in use and 10 days off, on the survival and infection rate of (Anabas testudineus) after co-infection with antibiotic-resistant Aeromonas dhakensis (isolate NV5M or V7L). The mortality rate observed in non-medicated groups of co-infected fish (93.3 and 100%) was significantly higher (p < 0.05) than that in the medicated group of naturally infected fish (NIF) (53.3%) but not significantly different to that in medicated groups of co-infected fish (66.6% and 86.6%). In particular, the loads of invasive erythromycin-resistant bacteria (ERB) were markedly higher (p < 0.05, 3.5-4.8 times) in the kidney of co-infected fish medicated for 5 days than those in NIF. The measure of ERB in the kidney of fish co-infected with isolate V7L, whether medicated or not for 10 days, was significantly higher (p < 0.05) than that in non-medicated NIF and also that in the medicated group of fish co-infected with isolate NV5M. In addition to the elevation of gut-derived ERB invasion and colonization in the kidney, synergistic effects of the competition between mixed pathogens caused by co-infection and medication might result in a high fish mortality rate. Further investigation of antibiograms and/or new strategies for aquatic disease control should be undertaken with mixed infections and interaction of pathogens to achieve the optimal treatment effect.
    MeSH term(s) Aeromonas ; Animals ; Anti-Bacterial Agents/pharmacology ; Coinfection/drug therapy ; Coinfection/veterinary ; Fish Diseases/drug therapy ; Vietnam
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2021-12-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 210415-5
    ISSN 1873-6254 ; 0001-706X
    ISSN (online) 1873-6254
    ISSN 0001-706X
    DOI 10.1016/j.actatropica.2021.106281
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Facile synthesis of silver/gold alloy nanoparticles for ultra-sensitive rhodamine B detection.

    Ha Pham, Thi Thu / Dien, Nguyen Dac / Vu, Xuan Hoa

    RSC advances

    2021  Volume 11, Issue 35, Page(s) 21475–21488

    Abstract: The synthesis of Ag/Au nanoparticles (NPs) in a controlled manner has been a challenge for a long time. The aim of this report is to present a systematic study on the fabrication, characterization of Ag/Au alloy NP-based surface-enhanced Raman ... ...

    Abstract The synthesis of Ag/Au nanoparticles (NPs) in a controlled manner has been a challenge for a long time. The aim of this report is to present a systematic study on the fabrication, characterization of Ag/Au alloy NP-based surface-enhanced Raman spectroscopy (SERS) substrates. Silver (Ag) and gold (Au) colloidal NPs were prepared by chemical reduction route of the corresponding metal salts by trisodium citrate (TSC). Ag/Au alloy nanoparticles with varying molar fractions are prepared in aqueous solution by the simultaneous reduction of AgNO
    Language English
    Publishing date 2021-06-17
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra02576g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Peak shape enhancement using diethylamine in hydrophilic liquid interaction chromatography: Application in simultaneous determination of methionine and paracetamol.

    Binh, Vu Ngan / Hue, Vu Thi Phuong / Ha, Pham Thi Thanh

    Journal of pharmaceutical and biomedical analysis

    2021  Volume 203, Page(s) 114214

    Abstract: Methionine (MET) is combined with paracetamol (PAR) in a pain relief soft capsule in order to prevent the haematologic damage of paracetamol. A hydrophillic liquid chromatographic (HILIC) method was developed for simultaneous determination of PAR and MET ...

    Abstract Methionine (MET) is combined with paracetamol (PAR) in a pain relief soft capsule in order to prevent the haematologic damage of paracetamol. A hydrophillic liquid chromatographic (HILIC) method was developed for simultaneous determination of PAR and MET in the combined formulation. Various analytical conditions were investigated, and the final method was chosen using silica column (150 × 4,6 mm; 5 μm), mobile phase of acetonitrile - aqueous solution of 10 mM formic acid 5 mM diethylamine (60:40, v/v), UV detection at 254 nm for PAR and 210 nm for MET. The method was validated according to ICH guidelines in terms of selectivity, linearity, accuracy, precision and robustness. The method was successfully applied for quantitation of both compounds in soft capsule preparations bought from the market. Notably, in this study, a novel approach was proposed to improve peak shape of amino acid - a problem often observed in HILIC. The addition of diethylamine to mobile phase shortened the retention time of MET and significantly improved peak shape on both silica and cyano columns, due to electrostatic interaction competition and silanol end-capping effect. The result of this research demonstrated the advantages of HILIC in simultaneous analysis of a polar compound amino acid, especially in combination with a less polar substance. The use of diethylamine as a mobile phase modifier to enhance peak shape is a new suggestion that can be used in further studies on amino acid analysis by HILIC.
    MeSH term(s) Acetaminophen ; Chromatography, High Pressure Liquid ; Chromatography, Liquid ; Diethylamines ; Hydrophobic and Hydrophilic Interactions ; Methionine
    Chemical Substances Diethylamines ; Acetaminophen (362O9ITL9D) ; Methionine (AE28F7PNPL)
    Language English
    Publishing date 2021-06-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 604917-5
    ISSN 1873-264X ; 0731-7085
    ISSN (online) 1873-264X
    ISSN 0731-7085
    DOI 10.1016/j.jpba.2021.114214
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Polyphenol Contents, Gas Chromatography-Mass Spectrometry (GC-MS) and Antibacterial Activity of Methanol Extract and Fractions of

    Tran, Thien Khanh / Ha, Pham Thi Thu / Henry, Robert J / Nguyen, Dang Nguyen Thao / Tuyen, Phung Thi / Liem, Nguyen Thanh

    Journal of microbiology and biotechnology

    2023  Volume 34, Issue 1, Page(s) 94–102

    Abstract: Plants contain a large number of phytochemical components, many of which are known as bioactive compounds and responsible for the expression of various pharmacological activities. The extract ... ...

    Abstract Plants contain a large number of phytochemical components, many of which are known as bioactive compounds and responsible for the expression of various pharmacological activities. The extract of
    MeSH term(s) Polyphenols/analysis ; Polyphenols/pharmacology ; Fruit/chemistry ; Plant Extracts/chemistry ; Methanol/chemistry ; Gas Chromatography-Mass Spectrometry ; Staphylococcus aureus ; Vietnam ; 1-Butanol/pharmacology ; Escherichia coli ; Antioxidants/pharmacology ; Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/analysis ; Phenols/pharmacology ; Flavonoids/pharmacology ; Acetates
    Chemical Substances ethyl acetate (76845O8NMZ) ; Polyphenols ; Plant Extracts ; Methanol (Y4S76JWI15) ; 1-Butanol (8PJ61P6TS3) ; Antioxidants ; Anti-Bacterial Agents ; Phenols ; Flavonoids ; Acetates
    Language English
    Publishing date 2023-09-30
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2412195-2
    ISSN 1738-8872 ; 1738-8872
    ISSN (online) 1738-8872
    ISSN 1738-8872
    DOI 10.4014/jmb.2304.04019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Developing efficient CuO nanoplate/ZnO nanoparticle hybrid photocatalysts for methylene blue degradation under visible light.

    Dien, Nguyen Dac / Thu Ha, Pham Thi / Vu, Xuan Hoa / Trang, Tran Thu / Thanh Giang, Trinh Duc / Dung, Nguyen Thi

    RSC advances

    2023  Volume 13, Issue 35, Page(s) 24505–24518

    Abstract: CuO/ZnO nanocomposites with different components can overcome the drawbacks of previously used photocatalysts owing to their promotion in charge separation and transportation, light absorption, and the photo-oxidation of dyes. In this study, CuO ... ...

    Abstract CuO/ZnO nanocomposites with different components can overcome the drawbacks of previously used photocatalysts owing to their promotion in charge separation and transportation, light absorption, and the photo-oxidation of dyes. In this study, CuO nanoplates were synthesized by the hydrothermal method, while ZnO nanoparticles were fabricated by the precipitation method. A series of CuO/ZnO nanocomposites with different ZnO-to-CuO weight ratios, namely, 2 : 8, 4 : 6, 5 : 5, 6 : 4, and 8 : 2 were obtained
    Language English
    Publishing date 2023-08-16
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra03791f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Structural Diversity, Spectral Data, and Pharmacological Effects of Genus Nigella.

    Luan Nguyen, Thanh / Anam, Aqsa / Hofdey Megbes, Farah / Mourad Mohammed, Ibrahim / Abed, Ahmed S / Imran Mallhi, Ali / Abdullateef Alzubaidi, Mazin / Ali Amir, Ahmed / Ayub, Asif / Arshad, Muhammad / Rauf, Abdul / Ha Pham Thi, Hai

    Chemistry & biodiversity

    2023  Volume 20, Issue 7, Page(s) e202300037

    Abstract: Nigella is one of the most studied plants because of its pharmacological properties like anti-parasitic, anti-inflammatory, neuro-protective, hepatoprotective, and anti-cancerous. In this study, about 20 species of the genus Nigella were reviewed and ... ...

    Abstract Nigella is one of the most studied plants because of its pharmacological properties like anti-parasitic, anti-inflammatory, neuro-protective, hepatoprotective, and anti-cancerous. In this study, about 20 species of the genus Nigella were reviewed and among them, N. damascene, N. glandulifera, and N. sativa are widely studied for their phytochemical and pharmacological effects. This review describes the phytochemical composition of the genus Nigella, which constitutes many of the compounds including alkaloids, flavonoids, saponins, and terpenoids. The extracts produced by using different solvents and the isolated compounds displayed a wide range of biological activity. These compounds were identified by different spectral techniques. The spectral detail of some advanced techniques including EIS-MS, UV/VIS, IR,
    MeSH term(s) Plant Extracts/chemistry ; Nigella/chemistry ; Alkaloids/pharmacology ; Alkaloids/chemistry ; Terpenes/pharmacology ; Phytochemicals/chemistry ; Ethnopharmacology
    Chemical Substances Plant Extracts ; Alkaloids ; Terpenes ; Phytochemicals
    Language English
    Publishing date 2023-06-21
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2139001-0
    ISSN 1612-1880 ; 1612-1872
    ISSN (online) 1612-1880
    ISSN 1612-1872
    DOI 10.1002/cbdv.202300037
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Facile synthesis of silver/gold alloy nanoparticles for ultra-sensitive rhodamine B detection

    Ha Pham, Thi Thu / Dien, Nguyen Dac / Vu, Xuan Hoa

    RSC advances. 2021 June 17, v. 11, no. 35

    2021  

    Abstract: The synthesis of Ag/Au nanoparticles (NPs) in a controlled manner has been a challenge for a long time. The aim of this report is to present a systematic study on the fabrication, characterization of Ag/Au alloy NP-based surface-enhanced Raman ... ...

    Abstract The synthesis of Ag/Au nanoparticles (NPs) in a controlled manner has been a challenge for a long time. The aim of this report is to present a systematic study on the fabrication, characterization of Ag/Au alloy NP-based surface-enhanced Raman spectroscopy (SERS) substrates. Silver (Ag) and gold (Au) colloidal NPs were prepared by chemical reduction route of the corresponding metal salts by trisodium citrate (TSC). Ag/Au alloy nanoparticles with varying molar fractions are prepared in aqueous solution by the simultaneous reduction of AgNO₃ and HAuCl₄ by TSC. The composition of Ag and Au in the alloy samples was controlled by tuning the molar ratio of Ag⁺/Au³⁺ in the mixture solution. The morphologies of the different products were characterized by TEM, and the size of obtained samples was in the range of 40 to 60 nm. The resulting samples were denoted as AgNPs, AuNPs, Ag₃Au, AgAu, and AgAu₃ NPs. In order to compare the optical property of the Ag/Au alloy and Ag/Au mixture, we mixed the pure Ag and Au NPs with different ratios to obtain the aggregated nanoparticles. Ag/Au alloy NPs were demonstrated as an ultrasensitive SERS substrate for the detection of rhodamine B (RhB) molecules. The concentration of RhB ranged from 10⁻¹¹ to 10⁻⁵ M. The effect of the Au content on the optical and SERS properties of the Ag/Au alloys was studied. The obtained results show that the Au content in the Ag/Au alloys play an important role in the physical properties of Ag/Au alloy NPs. The SERS spectra of RhB from the as-prepared Ag/Au alloy NP substrates indicated the superior enhancement with high reproducibility and sensitivity compared to those of Ag or Au samples. Interestingly, the highest SERS activity was achieved for the Ag₃Au sample with an enhancement factor larger than 10¹⁰ for 10⁻¹¹ M RhB and a limit of detection (LOD) at 10⁻¹¹ M, as well as good long-term stability after storage for 1 year. As far as we know, this is the highest sensitivity record of RhB by SERS detection. Furthermore, the composition-dependent SERS activity was explained in detail. These advantages demonstrated the potential for growing Ag/Au alloy NP-based SERS substrates in food safety and bioanalysis.
    Keywords Raman spectroscopy ; alloy nanoparticles ; alloys ; aqueous solutions ; chemical reduction ; citrates ; detection limit ; food safety ; gold ; nanogold ; rhodamines ; silver
    Language English
    Dates of publication 2021-0617
    Size p. 21475-21488.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/d1ra02576g
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Effects of Pulp Fiber and Epoxidized Tung Oil Content on the Properties of Biocomposites Based on Polylactic Acid

    Van Khoi Nguyen / Thanh Tung Nguyen / Thu Ha Pham Thi / Thu Trang Pham

    Journal of Composites Science, Vol 4, Iss 56, p

    2020  Volume 56

    Abstract: Recently, various environmental-friendly materials have been investigated and developed, especially composites of polylactic acid (PLA) and plant fibers. This paper investigates the effects of pulp fiber (PF) and epoxidized Tung oil (ETO) content on the ... ...

    Abstract Recently, various environmental-friendly materials have been investigated and developed, especially composites of polylactic acid (PLA) and plant fibers. This paper investigates the effects of pulp fiber (PF) and epoxidized Tung oil (ETO) content on the properties of biocomposites, based on polylactic acid. The bleached pulp fiber reinforced PLA (PLA/PF) composites with 10–50 wt% fiber contents and 0–15% epoxidized Tung oil contents (with a certain number of fiber) were prepared in an internal mixer (Plastograph ® EC) at 150 °C. The mechanical properties of PLA/PF composites were improved significantly. The pulp fiber reinforced PLA composites, with the fiber content of 30 wt%, were found to have the highest mechanical properties. The tensile and flexural properties of PLA/Tung oil-soaked-pulp fiber composites were higher than those of PLA/Tung oil unsoaked pulp fiber composites. In addition, the degradation temperature of PLA-based composites decreased after adding more pulp fiber. The pulp fibers were well-dispersed in the PLA matrix with the content up to 30 wt%. The interaction between pulp fiber and PLA matrix improved by the addition of epoxidized Tung oil. Epoxidized Tung oil also improved tensile and flexural strength of composite materials when it was added with a number of below 10% of fiber.
    Keywords poly (lactic acid) ; pulp fiber ; natural fiber reinforced composites ; epoxidized Tung oil ; Technology ; T ; Science ; Q
    Subject code 620
    Language English
    Publishing date 2020-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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