Many food snacks have the advantage but still have health risks as evidenced by the many cases of food poisoning, one of the causes of food poisoning is Bacillus cereus. This study aims to determine the amount and percentage of Bacillus cereus pollution on snacks sold in elementary schools. This research is expected to provide information to the public about the presence or absence of bacteria Bacillus cereus contamination. This research uses purposive sampling technique. The sample used in this study was hawker food sold in Elementary School as many as 20 samples consisting of 10 samples that have not fried and ten samples that have cooked. The results of the questionnaire study showed 83% of sellers did not put snacks in closed containers and found Bacillus cereus in meals. Conclusion 9 (45%) of food samples contaminated with Bacillus cereus bacteria

Coconut milk is a food ingredient that is used to increase the taste of food and drinks. Coconut milk has processed products in the form of traditional drinks such as ice dawet and cendol ice. According to the Indonesian National Standard in 2009 about Maximum Microbial Contamination in Food in liquid coconut milk must be in accordance with the requirements of TPC parameters, MPN Coliform, Salmonella sp., and Staphylococcus aureus. This study aims to determine the description of Staphylococcus aureus contamination in traditional coconut milk in the Banjarbaru region. This type of research is a descriptive survey. The samples in this study were traditional drinks (es dawet and es cendol) that used coconut milk by using Purposive sampling techniques as many as 6 sellers who made 2 times taking, namely taking 1 hour (testing I) after processing and 2 hours after the first take (testing II) . From the research that has been done, it is found that there are 4 samples of Staphylococcus aureus contamination in 4 samples, namely 3 samples fulfilling the requirements of the Indonesian National Standard and 1 sample that does not meet the requirements of the Indonesian National Standard. It is expected for the seller to always maintain personal hygiene, pay attention to the cleanliness of drinks sold either during processing or serving, noting the cleanliness of the appliance and storing the ingredients of the drinks sold.

Malassezia furfur is very easy to infect the skin of people who are often in damp places with higher water content for a long time. One of the plants that can add to inhibit the growth of Malassezia furfur is basil. The purpose of this study was to determine the number of Malassezia furfur mushroom growths formed on the SDA media with the addition of basil powder concentrations of 2%, 4%, 6%, and 8% on day 5. The method used in this study was experimental with a post-test research design with control. The material used is the leaves of basil plants obtained from basil plantations in Sukamara Village, Landasan Ulin Banjarbaru, Indonesia. The results of the study, Malassezia furfur, grew in all concentrations with a creamy colony, smooth and soft texture with sizes between 1-2 mm and microscopically obtained hyphae and spores. The conclusion of this study, Malassezia furfur mushroom growth in all concentrations of 2%, 4%, 6%, and 8% with the results of the number of colonies in a row that is 798 colonies, 755 colonies, 661 colonies, 622 colonies. The results showed a decrease in the name of colonies, with each increase in concentration.

Dayak onion (Eleutherine palmifolia (L.) Merr) is hereditary used by the Indonesian Kalimantan Dayak community as a medicinal plant with antimicrobial activity. The active ingredient of Dayak onions can inhibit the growth of bacteria such as Escherichia coli. The purpose of this study was to determine the effectiveness of Dayak extract (Eleutherine palmifollia (L) Merr) in inhibiting the growth of Escherichia coli in vitro. This research method is experimental. Posttest Only Control Group Design research design. Research Results Show that Dayak onion extract can inhibit Escherichia coli with concentrations of 10% (6 mm), 20% (8 mm), and 30% (11 mm), 40% (13 mm), 50% (16 mm), 60 % (18 mm) and 70% (20 mm), 80% (20 mm), 90% (24 mm) and 100% (30 mm). The conclusion of the study of Dayak extract has a different effect on the growth of Escherichia coli with a significance value of 0,000

Jeruk nipis (Citrus aurantifolia) dapat digunakan untuk obat batuk, peluruh dahak, influenza, dan obat jerawat. Jeruk nipis mengandung senyawa kimia yang bermanfaat salah satunya minyak atsiri dan flavonoid yang berfungsi sebagai antibakteri dan berperan sangat penting dalam menghambat pertumbuhan bakteri. Tujuan penelitian ini untuk mengetahui efektivitas air perasan jeruk nipis (Citrus aurantifolia) pada konsentrasi 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% dan 100%  terhadap pertumbuhan Eschericia coli secara in vitro. Penelitian ini bersifat  eksperimen dengan rancangan post test only control group design. Sampel penelitian adalah air perasan jeruk nipis. Pengujian daya antibakteri menggunakan metode difusi sumuran. Parameter daya antibakteri ditentukan dengan mengukur zona hambat  (mm) yang terbentuk di sekitar pertumbuhan bakteri uji pada media Muller Hinton Agar. Hasil Penelitian menunjukkan zona hambat air perasan jeruk nipis terhadap pertumbuhan Eschericia coli pada konsentrasi 40%, 50%, 60%, 70%, 80%, 90% dan 100% masing- masing berdiameter 7,25mm, 13,25mm, 14,25mm, 16mm, 17mm, 18,25mm, dan 20,75mm. Berdasarkan uji regresi linear didapat nilai signifikan 0,000 < α 0,05 sehingga dapat disimpulkan bahwa ada pengaruh air perasan jeruk nipis terhadap pertumbuhan Eschericia coli secara in vitro.  Disarankan pada penelitian lebih lanjut untuk menguji daya hambat air perasan jeruk nipis dengan menggunakan metode lain atau terhadap bakteri spesies lain.