Isolation and characterisation of theobromine-degrading filamentous fungi

Oduro-Mensah, D.; Ocloo, Augustine; Lowor, Sammy T.; Bonney, Evelyn Yayra; Okine, Laud Kenneth; Adamafio, N.A.

doi:10.1016/j.micres.2017.09.006

Cited by 18 publications

(28 citation statements)

References 25 publications

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“…Four filamentous fungi previously confirmed as capable of theobromine-degradation [ 31 ] were used as study isolates. The isolates were Aspergillus niger AnTD, Talaromyces verruculosus TvTD and two Talaromyces marneffei TmTD-1 and TmTD-2, with DNA identification sequences curated as KY697093, KY697096, KY697104 and KY697103, respectively, in the GenBank database [ 31 ].…”

Section: Methodsmentioning

confidence: 99%

“…Each isolate was cultured in 20 ml theobromine liquid medium, containing 1.9 mM theobromine at pH 5.8 [ 31 ] and inoculated to contain 2 × 10 4 spores per ml of medium. Control cultures were inoculated with inactivated inoculum.…”

Section: Methodsmentioning

confidence: 99%

“…Detheobromination using a filamentous fungus as bio-tool has been shown to be a plausible alternative [ 30 ]. In a previous study, isolation and characterization of several filamentous fungal isolates capable of theobromine degradation were reported [ 31 ]. As a furtherance, the current study was aimed at assessing and comparing the suitability of four of the theobromine-degrading fungi for biodetheobromination of CPH.…”

Section: Introductionmentioning

confidence: 99%

“…As a furtherance, the current study was aimed at assessing and comparing the suitability of four of the theobromine-degrading fungi for biodetheobromination of CPH. The four fungi were selected on the basis of being the most efficient at theobromine degradation, and their potential for use in detheobromination of CPH without any requirements for modification of ambient temperature or pH of the substrate [ 31 ]. In the current study, evaluation of suitability of the isolates for detheobromination of CPH was based on (1) effect on CPH theobromine content, (2) effect on CPH ochratoxin A content, (3) effect on nutrient content of CPH and (4) documented pathogenicity potential of isolate(s).…”

Section: Introductionmentioning

confidence: 99%

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Bio-detheobromination of cocoa pod husks: reduction of ochratoxin A content without change in nutrient profile

et al. 2018

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BackgroundUtilization of cocoa pod husks (CPH) in animal feed is hindered by the presence of theobromine, which is variably toxic to animals. Treatment of this agro-waste to remove theobromine, while preserving its nutrient content, would allow beneficial use of the millions of metric tonnes discarded annually. The aim of this study was to assess the suitability of selected theobromine-degrading filamentous fungi for use as bio-tools in degradation of theobromine in CPH.ResultsThe candidate fungi assessed in this study were an Aspergillus niger (AnTD) and three Talaromyces spp. (TmTD-1, TmTD-2, TvTD) isolates. All the fungi eliminated CPH theobromine, 0.15% w/w starting concentration, within 7 days of start of treatment, and were capable of degrading caffeine and theophylline. The fungi decreased CPH ochratoxin A content by 31–74%. Pectin was not detectable in fungus-treated CPH whereas parameters assessed for proximate composition were not affected.ConclusionsThe data provide ample evidence that the four isolates can be applied to CPH for the purpose of eliminating theobromine and decreasing ochratoxin A content without affecting nutrient profile. Comparatively, Talaromyces verruculosus TvTD was considered as most suitable for use as a bio-tool in detheobromination of CPH for animal feed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bio-detheobromination of cocoa pod husks: reduction of ochratoxin A content without change in nutrient profile

et al. 2018

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“…Several studies in East Africa have also documented high rates of ESBL-PE from clinical settings (8,9).…”

Section: Introductionmentioning

confidence: 99%

High fecal carriage of Extended Beta Lactamase producing Enterobacteriaceae among adult patients admitted in Referral Hospitals in Dar es salaam, Tanzania

Kibwana

Majigo

Kamori

et al. 2019

Preprint

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Background Multi-drug resistance pathogens such as Extended-Spectrum Beta-Lactamase (ESBL) producing Enterobacteriaceae (ESBL-PE) are of great global health concern, since they are associated with increased morbidity and mortality. Even in the absence of infections caused by these pathogens, colonization is a great threat and can lead to cross transfer among hospitalized patients. To date data on carriage of these pathogens is still limited in Tanzania. Therefore, this study aimed to determine ESBL-PE fecal carriage rate and associated factors among hospitalized patients at Referral hospitals in Dar es Salaam. Methods This was a cross sectional study conducted from May to July 2017 among patients admitted in three referral hospitals in Dar es Salaam, Tanzania. Rectal swabs were collected and screened for ESBL production using MacConkey agar supplemented with Ceftazidime 1mg/L. Phenotypic confirmation of ESBL-PE was done by double disk diffusion method. Statistical analysis was performed using Statistical Package for Social Sciences (SPPS) software version 20. Results Of the 196 enrolled participants, 59.7% (117/196) were confirmed to carry ESBL-PE. A total of 131 ESBL-PE were isolated from 117 patients, whereby, Escherichia coli accounted for 68.7%, Klebsiella pneumoniae 28.2% and Citrobacter species 0.8%. ESBL-PE carriage was significantly higher in patients with diarrhea compared to those without diarrhea (72% vs 53.1%, p=0.01). Recent antibiotic use was independently associated with carriage of ESBL-PE (aOR 14.65, 95%CI 3.07-69.88, p=0.01).Conclusions High fecal carriage of ESBL-PE was observed in patients admitted in tertiary hospitals in Dar es Salaam, Tanzania. The use of antibiotics was associated with carriage of ESBL producers among the study population.

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Guidelines for purine extraction and determination in foods

et al. 2021

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With the improvement of living standards over the years, the demand for "delicious food" has been increasing rapidly. Accordingly, the hidden risks associated with these kinds of food have gradually been attracting attention and purines have especially become of great interest. Food-derived purines are one of the important sources of purine in the body. Eventually, it is metabolized by the body to produce uric acid, which may lead to hyperuricemia and gout. Thus, detecting the purine content in foods could be a significant guidance for dietary intake. Here, this article reviews purine pretreatment and detection methods as well as the purine content of common foods. Perchloric acid hydrolysis and high-performance liquid chromatography were found to be the most commonly used pretreatment and quantification methods in purine detection.In addition, total purine content was in the order of plant foods < fungus and algae foods < animal foods < aquatic products. This reenforces the suggestion that, for individuals with hyperuricemia and gout, fewer or none intake of aquatic products and animal foods and increase intake of plant and fungal and algae foods may be a healthier option.

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Isolation and characterisation of theobromine-degrading filamentous fungi

Cited by 18 publications

References 25 publications

Bio-detheobromination of cocoa pod husks: reduction of ochratoxin A content without change in nutrient profile

Bio-detheobromination of cocoa pod husks: reduction of ochratoxin A content without change in nutrient profile

High fecal carriage of Extended Beta Lactamase producing Enterobacteriaceae among adult patients admitted in Referral Hospitals in Dar es salaam, Tanzania

Guidelines for purine extraction and determination in foods

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