Microbiological Content and Proximate Composition of Edible Frogs

Charity Willy-Vidona

Department of Microbiology, Edo State University Uzairue, Edo State, Nigeria.

Willy Barinem Vidona *

Department of Anatomy, Edo State University Uzairue, Edo State, Nigeria.

*Author to whom correspondence should be addressed.


Abstract

Introduction: The frog (Pelophylax esculentus) is an edible frog and its meat is popular in some parts of the world, especially in West African countries. The frog meat has protein nutrient content in the diet. Aim: The aim of this work is to find the microbiological quality and analyze the proximate composite value of Pelophylax esculentus and the objectives are to, isolate and determine the total heterotrophic count of bacteria and fungi associated with the meat, to also analyze and determine their nutritional contents. Methods: Methods involved samples collected and organs of the frog harvested and required parts isolated. Selective/differential media were used for the isolation of the sample. Biochemical characterization of the microorganism and appropriate proximate composition was done. Result: Results indicate the total heterotrophic bacterial count of 7.0x107cfu/g while total fungal, were 5.9x107cfu/g isolated from the gut; 6.8x106cfu/ml, total bacteria count and total fungal count of 5.2x106cfu/ml was from the skin while 7.3x106cfu/ml and 4.5x106/ml total bacteria and fungal count respectively from the mouth. The various bacteria and fungi isolated from the samples includes; Vibrio parahaemolyticus., Vibrio cholera. Shigalla.spp., Salmonalla spp., Escherichia coli., Staphylococcus spp., Bacillus spp., Klebsiella spp., Pseudomonas spp., and also fungal isolates includes; Aspergillus spp., Penicillium spp., Candida spp., Cryptococcus spp. While the Proximate Composition indicates; protein (45.06%), moisture (40.27%), ash (5.70%), carbohydrate (3.00%), fat (2.55%), and fibre (3.42%) respectively. Conclusion: This frog species is a very good source of protein as a meat delicacy compared to some other animal meat. Hence, it can be recommended in the diet of people lacking protein, especially where other animal meat is scarce or expensive. Based on some species of microorganisms discovered during the study that can pose as a threat to human health/life, hence the meat needs proper cooking and handling before consumption.

Keywords: Microbial quality, edible frog, proximate composition, microbial counts, isolation


How to Cite

Willy-Vidona, Charity, and Willy Barinem Vidona. 2024. “Microbiological Content and Proximate Composition of Edible Frogs”. Asian Journal of Food Research and Nutrition 3 (2):202-10. https://journalajfrn.com/index.php/AJFRN/article/view/124.

Downloads

Download data is not yet available.

References

Douglas SI, Amuzie CC. Microbiological quality of hoplobatrachus occipitalis (Amphibia, Anura) Used as Meat. Int Journal of Current Microbiol and Applied Sci. 2017;6(6):3192-3200.

Ho AL, Gooi CT, Pang HK. Proximate composition and fatty acid profile of anurans meat. Journal of Science & Technology. 2008;22(1):23–29.

Baygar T, Ozyur N. Sensory and chemical changes in smoked frog (Ranaesculanta) leg during cold storage. Journal of Animal Vte. Adv. 2010;9(3):588–593.

Harrigan WF, McCance ME. Laboratory methods in food and dairy microbiology, 8th ed. Academic Press Inc., London. 1990;7-23:286-303.

Anonymous. Annual book of ASTM standards. Water and Environmental Technology, ASTM, Philadelphia PA. 1994;11.02 (Water11):520-523,

Ogbalu OK, Douglas SI. Microbiological investigation of selected flies of public health importance from a waste dump site in port Harcourt, Nigeria. IOSR Journal of Pharmacy and Biological Sciences. 2015;10:75-78.

Ogbalu OK, Douglas SI. Culture-dependent characterization of microbes associated with oil palm kernel borer, pachymeruscardo in the Niger Delta. Journal Biochem Technol. 2016;8:14–18.

Cowan ST, Steel KJ. Manual for identification of medical bacteria. Cambridge University Press, Cambridge U.K; 1996.

Holt JG, Krieg NR, Sneath PHA., Staley JT, Williams ST. Bergey’s Manual of Determinative Bacteriology, Williams and Wilkins, Baltimore, Maryland, USA; 1994.

Larone DH. Medically Important fungi: A guide to identification. American Society for Microbiology Press, Washington DC; 1995.

Barnett HL, Hunter BB. Illustration of Genera of Fungi Imperfecti, 3rd edition, Burgess Publication Co Minneapolis. 1972;62-63.

AOAC. Official methods of analysis, 17th Edition. Association of Official Analytical Chemist, Arlington; 2000.

AOAC. (Association of Official Analytical Chemicals) Reference Method: 920.21 Official Method of Analysis of the AOAC (W. Horwitz Editor Eighteen Edition, Washington; D. C; 2006.

James CJ. The analytical chemistry of foods. Chapman and Hall Press, New York. 1995;86.

Buchanan R, Gibbons N. Bergey’s manual of determinative bacteriology (8thedn). Williams and Wilkins Co, Baltimore U.S.A. Am J Public Health. 1974;65(3):315.

Koffi AC, kone MB, Sylla A, Koffi-Nevry R. Evaluation of the microbiological and nutritional quality of dried frogs marketed in Man (Côte d’Ivoire). GSC Biological and Pharmaceutical Sciences. 2022;21(01): 067–073.

Rygaard AM, Thøgersen MS, Nielsen KF, Gram L, Bentzon-Tilia M. Effects of gelling agent and extracellular signaling molecules on the culturability of marine bacteria. Applied and Environmental Microbiology. 2017;83(9):00243-17.

Tamaki H, Hanada S, Sekiguchi Y, Tanaka Y, Kamagata Y. Effect of gelling agent on colony formation in solid cultivation of microbial community in lake sediment. Environmental Microbiology. 2009;11: 1827–1834.

Austin B, Austin DA. Bacterial fish pathogens. 4th ed. Chichester, UK: Springer-Praxis; 2007.

Kia GSN, Benjamin EA, Ajani EO, Otolorin GR. Sokoto Journal of Veterinary Sciences. 2018;16 (2):75-82.

Breijyeh Z, Jubeh B, Karaman R. Resistance of gram-negative bacteria to current antibacterial agents and approaches to resolve it. Molecules. 2020;16;25(6):1340.

Azzam SZ, Cayme GJ, Martinez LR. Polymicrobial interactions involving fungi and their importance for the environment and in human disease. Microb Pathog. 2020;140:103942.

Qiongping S, Jiaer Z, Tieyu W, Yonglong X, Xinyi Z, Hancheng Z, Jianwen W, Yueyao F, Ran B, Shuqing W, Seongjin H, Jong SH. Cooking methods effectively alter perfluoroalkyl substances and nutrients in cultured and wild bullfrogs. Journal of Hazardous Materials. 2023;445.

Zhu Y, Bao M, Chen C, Yang X, Yan W, Ren F, Wang P, Wen P. Comparison of the nutritional composition of bullfrog meat from different parts of the animal. Food Sci Anim Resour. 2021;41(6):1049-1059.

Hatutale MN. Microbial diversity, nutritional value and antioxidant activity of the edible giant African bullfrog (Pyxicephalus Adspersus Tschudi, 1838) meat from Oshana region of Namibia. A thesis submitted in partial fulfilment of the requirements for the Degree of Master of Science (Microbiology); 2022 Available:http://hdl.handle.net/11070/3555, 2022

Jenkinson HF, Douglas LJ. Interactions between Candida Species and Bacteria in Mixed Infections. In: Brogden KA, Guthmiller JM, editors. Polymicrobial Diseases. Washington (DC): ASM Press; Chapter; 2002;18.

Kjeldahl J. New method for the determination of Nitrogen. Chem.News. 1983;48(1240):101–102

Mary EA. Macconkey agar plates protocols; 2005. Available:http://www.asmscience.org/content/education/protocol/protocol.285, 2005