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Toberni S Situmorang
Program Studi Analis Kesehatan, Fakultas Kesehatan, Universitas Efarina, Indonesia.
Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Karakteristik Jamur Kontaminan Pascapanen pada Beberapa Jenis Umbi – umbian Rahmiati Rahmiati; Toberni S Situmorang; Helen Anjelina Simanjuntak; Dini Pratiwi; Indah Sari
Herbal Medicine Journal Vol 9 No 1 (2026): Herbal Medicine Journal
Publisher : Program Studi S1 Farmasi, STIKES Senior, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58996/hmj.v9i1.207

Abstract

The quality of tuber crops frequently deteriorates as a result of post-harvest fungal contamination. Fungal contamination of potatoes, sweet potatoes, and taro tubers during post-harvest handling and storage can significantly reduce their economic value and pose potential health risks through the production of mycotoxins. This study aimed to evaluate the post-harvest shelf life of potato, sweet potato, and taro tubers and to identify the fungal species contaminating these commodities. A qualitative descriptive approach was employed using the scratch plate isolation method. Fungal contaminants were characterized based on macroscopic colony morphology and microscopic features. The research procedures included sample preparation, assessment of physical quality changes during storage, fungal isolation, and identification. The results demonstrated that taro tubers maintained the highest physical quality after 14 days of storage, whereas potato tubers exhibited the most pronounced physical deterioration and the highest incidence of fungal contamination. A total of eight fungal isolates with distinct macroscopic and microscopic characteristics were obtained, designated as T1SP1, T1SP2, U1SP1, U1SP2, T2SP1, T2SP2, T3SP1, and T3SP2. These isolates were identified as belonging to the genera Aspergillus, Trichoderma, Colletotrichum, and Curvularia.
Analisis Cemaran Bakteri Coliform dan Escherichia coli pada Sampel Sari Tebu yang dijual di Pedagang Kaki Lima Toberni S Situmorang; Helen Anjelina Simanjuntak; Rahmiati Rahmiati
Herbal Medicine Journal Vol 9 No 1 (2026): Herbal Medicine Journal
Publisher : Program Studi S1 Farmasi, STIKES Senior, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58996/hmj.v9i1.210

Abstract

Sugarcane juice is a beverage extracted from sugarcane that is popular and widely consumed by the public. This condition creates business opportunities, particularly for street vendors. However, processing practices that do not adequately consider hygiene and sanitation aspects can increase the risk of contamination by pathogenic bacteria, especially Coliform bacteria and Escherichia coli. This study aimed to determine the level of contamination of Coliform bacteria and Escherichia coli in sugarcane juice sold by street vendors. This research employed a descriptive qualitative design using the spread plate isolation method. Samples were obtained from five street vendors located along the main roads of Tanjung Selamat Subdistrict, Medan Tuntungan District, Medan City. Bacterial contamination testing was conducted using the Most Probable Number (MPN) method, which consisted of three stages: presumptive test, confirmatory test, and completed test. The results showed that one out of five sugarcane juice samples tested were detected to contain Coliform bacteria and Escherichia coli. These findings indicate that one sugarcane juice samples sold by street vendors did not meet food safety standards and may pose potential health risks to consumers. Therefore, improved implementation of hygiene and sanitation practices in the processing and serving of sugarcane juice is necessary.
Co-Authors Dini Pratiwi Helen Anjelina Simanjuntak Indah Sari Rahmiati Rahmiati Rahmiati Rahmiati