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Journal : Jurnal Info Kesehatan

Effect of pH Variations in Eosin Methylene Blue Agar (EMBA) Medium on E. coli Growth Lestari, Diah; Haliza, Eva Nur; Setiawan, Heru
JURNAL INFO KESEHATAN Vol 22 No 1 (2024): JURNAL INFO KESEHATAN
Publisher : Research and Community Service Unit, Poltekkes Kemenkes Kupang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31965/infokes.Vol22.Iss1.1298

Abstract

The growth of E. coli is influenced by several factors, including environmental pH. Environmental pH unsuitable for bacterial growth conditions will interfere with the enzyme activity and influence bacterial growth. This study aimed to determine the effect of pH variations (5.3, 5.8, 6.3, 7.3, 7.8, 8.3) in EMBA medium on E. coli growth. The research method used was true experiment post-test-only control design. The samples in this study were suspensions with dilutions of 10-4, 10-5, 10-6, and 10-7, inoculated using the duplo test to EMBA with various pH conditions, so that the total sample size is 48. The results showed that the mean number of E. coli bacteria on EMBA with pH 5.3 was 9.1 x 106 CFU/mL; with pH 5.8 was 9.6 x 106 CFU/mL; with pH 6.3 was 1.2 x 107 CFU/mL; with pH 7.3 was 1.1 x 107 CFU/mL; with pH 7.8 was 9.7 x 106 CFU/mL; and with pH 8.3 was 7.1 x 106 CFU/mL. Growth in positive control showed the mean number 1.4 x 107 CFU/mL; negative control showed no growth of E. coli or other microorganisms. Based on the One-Way ANOVA statistical test with a 95% confidence level, there was no difference in the mean number of E. coli bacteria in the six pH variations of EMBA medium (p-value > 0.05). E. coli bacteria grew best at neutral pH. Its growth decreases in slightly acidic and slightly alkaline pH, but it can still be observed. This allows E. coli to survive in extreme pH. Pathogenic E. coli have developed the potential to live inside the human body. They will experience temporary stress in unfavourable conditions before finally adapting. The advice for future researchers is to test the effect of pH on E. coli growth by using other E. coli growth media or with a wider range of pH (more acidic and more basic). It is also recommended to conduct further research about the effect of various environmental conditions such as temperature, nutrients, and others on bacterial growth.
Co-Authors Achwan, Achwan Adawiyah, Marosa Robi’atul Afiandi, Ravi Agustini, Putu Linda AHMAD JUNAEDI Aini, Jannatul Alhafizin, M. Ananda, Liandry Dea Dwi Andari Andari, Andari Andreas Hariandja, Andy Martahan Andreas Priyono Budi Prasetyo ansori ansori Anton Sumarpo Aprianto, Iwan Arsi, Maftah Al Arzam, Ismail Zaid Asmaul Husna, Fika Astuti, Andriani Widi Astuti, Julya Aulia, Alfina Azhar Affandi Aziz Amrullah, Aziz B L, Abdurahman Berbudi Baihaqi, Muhammad Iqbal Baiq Sri Handayani Bambang Supriatno Bebena, Ismiralda Bintoro, Siprianus Ugroseno Yudho Budiyanto, Darmawan Cahyadi, Lalu M. Zidan Dadi Setiadi Damayanti, Inggit Debora Turnip, Lowisa Deddy Hartanto Delphi, Syakila Gita Devi, Helena Diah Lestari, Diah Didik Santoso Dwi Kurniawati, Dwi Dyah R Hizbaron, Dyah R E. Devi Dwi Rianti, E. Devi Dwi Edi Ariyanto Fadhillah, Falya Aura Farida Agustin, Farida Farnia Sari, Farnia Fauzi, Hairul Febiyanto, Novian Gaya Tridinanti, Gaya Gunawan, Nofri Hakim, Muhammad Alfianul Hakim, Muhammad Nur Haliza, Eva Nur Handaru Jati HANDRA, HEFRIZAL Helena, Shifa Herawaty, Wike Herietrenggi, Kristanti Herman, Marliah Ananda Hery Kresnadi Hidayat, X.Zardht Alex I Wayan Merta I Wayan Mertha Ilhamdi, M Liwa Ilhamdi, Mohammad Liwa Ilmi, Muhamad Yazid Mizanul Istiqomah, Nurul Hafifah Jamilul Insan Jamí’’yyah, Shafro’Khuluq Kasnadi, Kasnadi Kausar, Shakila Ketut Rachmi Handayani , I Gusti Ayu Khaerunnissa, Intan Koosbandiah Surtikanti, Hertien Kurniawan, Ganesa Puput Dinda Kurniawan, Ramdani Kusnadi Kusuma, Anindita SHM Kusuma, Anindita Suliya Hangesti Mandra Larasati, Sri Aprilia Nur Lestari, Ajeng Puri Lestari, Septiani Lestari, Tri Ayu LINGGAWAN, STEPHANI Lunga, Fransisca Novita Lutfiani, Salsabila Arzaqia M. Guntur Hamzah M. Shoffa Saifillah Al Faruq Manisa, Safariyanti Maryatul Qiptiyah Mas Mansyur, Mas Mawati, Nenni Mohamad Rahmad Suhartanto Mohd Arifullah Muhammad Yusup Munifah, Siti Musli musli Nabila, Hesti Ni Luh Putu Pebri Artayani . Niarni, Baiq Gina Amalia Nijam Akbar, Muhammad Nita Ria, Nita Nora Idiawati Nugroho, Rahmad Nur, M. Faidotun Nuryana, Muhammad Insyirah Rizieq Octaviani, Azzya Pambudi, Restu Arya Pasaribu, Merci Monica Pebrianti, Hasita Permatasari, Dian Dwi Prasetyorini, Tri Pratama Zurmauliriansyah, Rifzki PUJI LESTARI Purnamawati, Rena Putri, Hermaya Sura Putri, Siska Aulia Qudraty, Harsa Naunik RAHARJO, BUDIONO Rahmah, Risa Amelia El Rasmi, Dewa Ayu Citra Razzaq, Agung Abdul Reni Reni, Reni Reza Faizal, Reza Reza Maulana Riandi Riandi Ridho, M.Rasyid Ririen Wardiani, Ririen Ristianafi, Diana Putri Riyanto Riyanto Ropidah, Risky Riyyatul Rosidawati Rosidawati, Rosidawati Safrudin Safrudin Saifillah al-Faruq, Muhammad Sofa Sakaroni, Rubiyatna Sapta R , Fajria Noor Sastro, Marlia Seftiana, Irma Semendawai, Muhammad Yusuf Septiani, Sella Septina, Gista Sesareny, Nadiya Setiyono, Tatang siti rodiah Solly Aryza Sri Hartati Sukarso, Aa Supriyadi Sur’atunisa, Dean Sutejo Sutejo SUYANTRI, ENI Syaharuddin Y, Syaharuddin Y Syamsul Bahri Syarif, Algifari Tahmid Sabri Tampubolon, Desi Putri Tangkudung, James Tegnan , Hilaire Teguh Budi Prijanto, Teguh Budi Tipa, Kurniayati Umami, Lia Uswatun Hasanah Utami, Ulya Febria Venna, Venna Vito, Yulius Kristoforus Wahyuningtyas Puspitorini Warada, Hafindro Wisesa, Adinda Bonita Wiwi Isnaeni Wyrmand, Dustin Zaharuddin Zuanisa, Ai Zulfan