Comparative Occurrence of Resident Fungi on Gamma Irradiated and Steam Sterilized Sorghum Grains (Sorghum bicolor L.) for Spawn Production in Ghana

Kortei, Nii Korley; Odamtten, G.T.; Appiah, Victoria; Obodai, M.; Adu-Gyamfi, A.; Kwagyan, Michael Wiafe

doi:10.9734/bbj/2015/16747

Cited by 8 publications

(10 citation statements)

References 32 publications

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“…Results obtained in this paper agrees favorably with the findings of Kortei et al. (), Kortei, Odamtten, Obodai,Appiah, Adu‐Gyamfi, et al., () and Kortei, Odamtten, Obodai, Appiah, & Wiafe‐ Kwagyan, () who recorded 2.4 average log cycles reduction in fungi on dried mushroom fruitbodies and sorghum grains, respectively, using 2.0 kGy of gamma radiation. On the other hand, Ribeiro et al.…”

Section: Discussionsupporting

confidence: 92%

“…Results obtained in this work agrees with the report of Frazier and Westhoff () who stated D 10 ‐values of 4–11 kGy for yeasts and 1.3–11 kGy for moulds. Recently, Kortei, Odamtten, Obodai, Appiah, & Wiafe‐ Kwagyan, ; Kortei, Odamtten, Obodai,Appiah, Adu‐Gyamfi et al., recorded D 10 values of 5.64 and 5.94 kGy, respectively, on the influence of gamma radiation and steam sterilizations on the survival of resident fungi of composted sawdust in Ghana. Abouzeid, Abd‐Elrahman, Hassan, Youssef, and Hammad () found that Aspergillus and Penicillium species were relatively sensitive to ionizing radiation with a D 10 values between 0.25 and 0.65 kGy; whereas Fusarium sp .…”

Section: Discussionmentioning

confidence: 99%

“…The long standing use of gamma radiation in the preservation of fruits, vegetables, pulses, cereals, and dried products has shown encouraging results (Addo, ; IAEA TECDOC, ; Kortei, Odamtten, Obodai,Appiah, Adu‐Gyamfi et al., ; Kortei, Odamtten, Obodai, Appiah, & Wiafe‐ Kwagyan, ; Kortei, ; Odamtten, ; Odamtten, Appiah, & Langerak, ). The recommendation by the joint FAO/IAEA/WHO Expert Committee on the wholesomeness of irradiated foods gave the impetus for the acceptability of food irradiated up to an overall dose of 10 kGy and the adoption by the Codex Alimentarius Commission for irradiated foods in 1983, has contributed to a wide acceptance of food irradiation as a preservation method.…”

Section: Introductionmentioning

confidence: 99%

“…Yeasts and fungi play a major role in the spoilage of foods in Ghana as their growth on foods can cause major quality problems. Some fungi produce potent mycotoxins which could be carcinogenic, mutagenic, teratogenic, and allergic (Tournas, ; Kortei, Odamtten, Obodai,Appiah, Adu‐Gyamfi et al., ). A good packaging material should not harbor and support growth of microorganisms and should also be able to maintain the lower water activity of the mushrooms after drying during storage.…”

Section: Introductionmentioning

confidence: 99%

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Mycofloral profile and the radiation sensitivity (D₁₀ values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Kortei

Odamtten

Obodai

et al. 2017

Food Science & Nutrition

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The presence of fungi in our foods poses serious health risks as some genera of fungi may produce certain mycotoxins which have carcinogenic, mutagenic, teratogenic, and immunosuppressive effect on humans and animals alike. Fruitbodies of Pleurotus ostreatus were solar dried at a moisture content of 12.5 ± 0.2% and stored in polythene and polypropylene packs, gamma irradiated at doses of 0 (control), 1, 2, 3, 4, and 5 kGy at a dose rate of 1.7 kGy/hr from a Cobalt 60 source (SLL, 515, Hungary) and stored at room temperature 28–30°C for a period of 12 months. Mycological analyses were done at intervals of 0, 3, 6, and 12 months. A total of eleven (11) fungi belonging to eight fungal genera were isolated on both Cooke's and DRBC media; Aspergillus (A. niger, A. flavus, A. fumigatus, A. tamarii), Rhizopus (R. oligosporus), Mucor (M. racemosus), Fusarium (F. oxysporum), Penicillium (Penicillium sp.), Trichoderma (T. viride), and Rhodotorula sp. were recorded. There was a significant (p < .05) reduction in initial mycofloral population by an average of 2.2 log cycles as well as in species numbers with increasing doses of radiation. Radiation sensitivity (D10 values) also ranged between 1.68–2.78 kGy. Gamma irradiation treatment is one way which can enhance food safety through the reduction in potential pathogens and has been recommended as part of a comprehensive program to enhance food safety.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mycofloral profile and the radiation sensitivity (D₁₀ values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Kortei

Odamtten

Obodai

et al. 2017

Food Science & Nutrition

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“…Recent studies in Ghana have demonstrated the ability of gamma radiation to depolymerize lignocellulosic mushroom compost into inexpensive protein per unit area of mushroom of the genus Pleurotus [10][11][12][13][14] and produced quantities of the cherished mushroom.…”

Section: Introductionmentioning

confidence: 99%

Survey of mushroom consumption and the possible use of gamma irradiation for sterilization of compost for its cultivation in Southern Ghana

et al. 2018

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Background: Mushroom cultivation is increasingly becoming a serious agribusiness in Ghana, especially at the time when entrepreneurship is being encouraged to reduce the pressure of employment in the government sector and also due to its nutritional and medicinal attributes.Methods: A survey was carried out using the rapid appraisal method to review the existing methods of sterilization, use of gamma radiation in substrate sterilization and food preservation, preference of mushrooms in Ghana by consumers and nutritional and medicinal attributes of the mushroom. Results:The survey demonstrated the popularity of drum (moist heat) technique of sterilization in Ghana. Majority (64%) of the respondents were dissatisfied with the method of sterilization of compost and spawn substrate, while 36% indicated the method was alright by them. Majority (82%) of the respondents had never heard of sterilization of substrates for cultivation and its subsequent preservation of food or mushroom by gamma irradiation technique. All consumers (100%) desired to see their favorite mushroom produced all year round, and this constituted a significant (p < 0.05) viewpoint. Furthermore, a significant (p < 0.05) majority (90%) of the respondents were all for promotion of the consumption of mushroom, while a small percentage (10%) were noncommittal. Conclusion:Information and knowledge on the gamma irradiation technique for substrate production and consumption patterns of P.ostreatus mushrooms were not widely disseminated as anticipated.

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Fungal diversity of “solom” a Ghanaian traditional beverage of millet (Pennisetum glaucum)

Kortei

Asiedu

Annan

et al. 2020

Food Science & Nutrition

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The association of cereals with fungi cannot be disregarded as their manifestation in our foods poses serious health risks. The aim of this study was to investigate the mycofloral (fungal) and chemical (pH) qualities of the “solom” (beverage of millet) available for consumption from their respective sales points in Ho. “Solom” a cereal beverage of millet was sampled from ten (10) different locations in the Ho Municipality of Ghana and evaluated for their pH, fungal counts, and species diversity. Mycological analyses were done on Oxytetracycline Glucose Yeast Extract (OGYE) and Dichloran Rose Bengal Chloramphenicol (DRBC) media from three (3) points per location using serial dilution. A total of fourteen (14) fungal species belonging to eight (8) genera were isolated on both media; Aspergillus (A. niger, A. flavus, A. fumigatus, A. parasiticus, A. alutaceaus, A. terreus), Rhizopus (R. stolonifer), Mucor (M. racemosus), Fusarium (F. oxysporum), Penicillium (P. digitatum, P. verucosum), Cladosporium (C. cladosporoides), Curvularia (C. lunata), and Rhodotorula sp. were recorded. Fungal counts on both media ranged between 1.68 ± 0.8 and 4.11 ± 0.9 log10 CFU/ml. There were statistically significant (p < .05) differences observed in the samples from different locations. The values of pH recorded were in the range of 3.03 ± 0.09–4.03 ± 0.23 and showed no significant differences (p > .05) among them. All samples were found to be in the acceptable range of values prescribed by the International Commission for Microbiological Specification of Foods (ICMSF, 1998). Good Manufacturing Practices (GMP) and Good Hygiene Practices (GHP) should be employed to enhance food safety.

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Comparative Occurrence of Resident Fungi on Gamma Irradiated and Steam Sterilized Sorghum Grains (Sorghum bicolor L.) for Spawn Production in Ghana

Cited by 8 publications

References 32 publications

Mycofloral profile and the radiation sensitivity (D₁₀ values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Mycofloral profile and the radiation sensitivity (D₁₀ values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Survey of mushroom consumption and the possible use of gamma irradiation for sterilization of compost for its cultivation in Southern Ghana

Fungal diversity of “solom” a Ghanaian traditional beverage of millet (Pennisetum glaucum)

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Comparative Occurrence of Resident Fungi on Gamma Irradiated and Steam Sterilized Sorghum Grains (Sorghum bicolor L.) for Spawn Production in Ghana

Cited by 8 publications

References 32 publications

Mycofloral profile and the radiation sensitivity (D10 values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Mycofloral profile and the radiation sensitivity (D10 values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Survey of mushroom consumption and the possible use of gamma irradiation for sterilization of compost for its cultivation in Southern Ghana

Fungal diversity of “solom” a Ghanaian traditional beverage of millet (Pennisetum glaucum)

Contact Info

Product

Resources

About

Mycofloral profile and the radiation sensitivity (D₁₀ values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials

Mycofloral profile and the radiation sensitivity (D₁₀ values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials