Abstract
Cronobacter spp. in powdered infant formula has been etiologically linked to meningitis and necrotizing enterocolitis in certain groups of infants. This study aimed to determine whether C. sakazakii Yrt2a strain experiencing desiccation stress could enter viable but nonculturable (VBNC) state as well as to examine the expression of genes associated with stress and virulence during the above states. Stress and VBNC conditions were determined based on viability and culturability assays. Expression of genes related to stress (rpoS) and virulence (hfq and ompA) was evaluated by real-time PCR. The results showed that C. sakazakii Yrt2a entered VBNC 24 days post exposure to 2 h of desiccation treatment. The expression of rpoS, hfq and ompA genes was up-regulated during stress conditions, suggesting that Cronobacter successfully managed stress to maintain its culturability while maintaining its virulence. The expression of the target genes decreased at VBNC state but remained higher than that of a normal state. These findings reinforce the assumption that C. sakazakii undergoing VBNC state maintains its pathogenicity.
Similar content being viewed by others
References
Ramamurthy T, Ghosh A, Pazhani GP, Shinoda S. Current perspectives on viable but non-culturable (VBNC) pathogenic bacteria. Front. Public Health. 2: 1–9 (2014)
Liu Y, Gilchrist A, Zhang J, Li XF. Detection of viable but nonculturable Escherichia coli O157:H7 bacteria in drinking water and river water. Appl. Environ. Microbiol. 74: 1502–1507 (2008)
Dewanti-Hariyadi R, Gitapratiwi D, Meutia YR, Estuningsih S, Hidayat SH, Nurjanah S. pp. 281-286. In: Proceeding of International Seminar Current lssues and Challenge In Food Safety. December 2-3, IPB Convention Center, Bogor, Indonesia. Southeast Asian Food & Agricultural Science & Technology (SEAFAST) Center, Bogor, Indonesia (2010)
Gitapratiwi D, Dewanti-Hariyadi R, Hidayat SH. Genetic relatedness of Cronobacter spp. isolated from dried food products in Indonesia. Int. Food Res. J. 19: 1745–1749 (2012)
Chap J, Jackson P, Siqueira R, Gaspar N, Quintas C, Park J, Osaili T, Shaker R, Jaradat Z, Hartantyo SH, Sani AN, Estuningsih S, Forsythe SJ. International survey of Cronobacter sakazakii and other Cronobacter spp. in follow up formulas and infant foods. Int. J. Food Microbiol. 136: 185–188 (2009)
Rashidat E, Olugbo A, Ifeanyl S, Adetoun F, Adedayo O, Moses B. Isolation and PCR detection of Cronobacter sakazakii from powdered infant formulae retailed in Nigeria. Am. J. Food Nutr. 3: 182–187 (2013)
Álvarez-Ordóñez A, Begley M, Clifford T, Deasy T, Collins B, Hill C. Transposon mutagenesis reveals genes involved in osmotic stress and drying in Cronobacter sakazakii. Food Res. Int. 55: 45–54 (2014)
Beuchat LR, Kim H, Gurtler JB, Lin LC, Ryu JH, Richards GM. Cronobacter sakazakii in foods and factors affecting its survival, growth, and inactivation. Int. J. Food Microbiol. 136: 204–213 (2009)
Sinaga YMR, Dewanti-Hariyadi R, Suliantari. Cronobacter sakazakii enters viable but nonculturable state during biofilm formation. J. Teknol. Industri Pangan. 27: 140–147 (2016) (in Bahasa Indonesia)
Rozen Y, Dyk TK, LaRossa RA, Belkin S. Seawater activation of Escherichia coli gene promoter elements: dominance of rpoS control. Microb Ecol. 42: 635–643 (2001)
Kim S, Hwang H, Kim KP, Yoon H, Kang DH, Ryu S. Hfq plays important roles in virulence and stress adaptation in Cronobacter sakazakii ATCC 29544. Infect Immun. 83: 2089–2098 (2015)
Valentin-Hansen P, Eriksen M, Udesen C. The bacterial Sm-like protein Hfq: a key player in RNA transactions. Mol. Microbiol. 56: 1525–1533 (2004)
Nair MKM, Venkitanarayanan K. Role of bacterial OmpA and host cytoskeleton in the invasion of human intestinal epithelial cells by Enterobacter sakazakii. Pediatrics Res. 62: 664–669 (2007)
Singamsetty VK, Wang Y, Shimada H, Prasadarao NV. Outer membrane protein A expression in Enterobacter sakazakii is required to induce microtubule condensation in human brain microvascular endothelial cells for invasion. Microb Pathog. 45: 181–191 (2008)
Al-Nabulsi AA, Osaili TM, Elabedeen NA, Jaradat ZW, Shaker RR, Kheirallah KA, Tarazi YH, Holley RA. Impact of environmental stress desiccation, acidity, alkalinity, heat or cold on antibiotic susceptibility of Cronobacter sakazakii. Int. J. Food Microbiol. 146: 137–143 (2011)
Du M, Chen J, Zhang X, Li A, Li Y, Wang Y. Retention of virulence in a viable but nonculturable Edwardsiella tarda isolate. Appl. Environ. Microbiol. 73: 1349–1354 (2007)
Maturin L, Peeler JT. Bacteriological Analytical Manual Chapter 3 Aerobic Plate Count Available from: https://www.fda.gov/Food/FoodScienceResearch/LaboratoryMethods/ucm063346.htm#references. (2001)
Pfaffl MW. A new mathematical model for relative quantification in qPCR. Nucleic Acid Res. 29: 2002–2007 (2000)
Shaker RR, Osaili TM, Abu Al-Hasan AS, Ayyash MM, Forsythe SJ. Effect of desiccation, starvation, heat, and cold stresses on the thermal resistance of Enterobacter sakazakii in rehydrated infant milk formula. J. Food Sci. 73: M354–M359 (2008)
Yang DC, Blair KM, Salama NR. Staying in shape: the impact of cell shape on bacterial survival in diverse environments. Microbiol Mol. Biol. Rev. 80: 187–203 (2016)
Adams BL, Bates TC, Oliver JD. Survival of Helicobacter pylori in a natural freshwater environment. Appl. Environ. Microbiol. 69: 7462–7466 (2003)
Zeng B, Zhao G, Cao X, Yang Z, Wang C, Hou L. Formation and resuscitation of viable but nonculturable Salmonella typhi. Biomed. Res. Int. 2013: 1–7 (2013)
Vives-Rego J, Lebaron P, Caron GN. Current & future of flowcytometry in aquatic microbiology. FEMS Microbiol Rev. 24: 429–448 (2000)
Huang Y, Pang Y, Wang H, Tang Z, Zhou Y, Zhang W, Li X, Tan D, Li J, Lin Y, Liu X, Huang W, Shi Y. Occurrence and characterization of Cronobacter spp. in dehydrated rice powder from Chinese supermarket. PLoS One. 10: 1–11 (2015)
Yokomaku D, Yamaguchi N, Nasu M. Improved direct viable count procedure for quantitative estimation. Appl. Environ. Microbiol. 66: 5544–5548 (2000)
Wesche AM, Gurtler JB, Marks BP, Ryser ET. Stress, sublethal injury, resuscitation and virulence of bacterial foodborne pathogens. J. Food Prot. 72: 1121–1138 (2009)
Pellon J, Sinskey A. Heat-induced damage to the bacterial chromosome and it’s repair. pp. 106–125. In: The revival of injured microbes. Andrew MHE, Russell AD (ed). Academic Press, London (1984)
Kusumoto A, Asakura H, Kawamoto K. General stress sigma factor RpoS influences time required to enter the viable but non-culturable state in Salmonella enterica. Microbiol. Immunol. 56: 228–237 (2012)
Santander RD, Monte-Serrano M, Rodriguez-Herva JJ, Lopez-Solanilla E, Rodriguez-Palenzuela P, Biosca EG. Exploring new roles for the rpoS gene in the survival and virulence of the fire blight pathogen Erwinia amylovora. FEMS Microbiol. Ecol. 90: 895–907 (2014)
Asakura H, Kawamoto K, Haishima Y, Igimi S, Yamamoto S, Makino S. Differential expression of the outer membrane protein W (OmpW) stress response in enterohemorrhagic Escherichia coli O157:H7 corresponds to the viable but non-culturable state. Res. Microbiol. 159: 709–717 (2008)
Zhao F, Wang Y, An H, Hao Y, Hu X, Liao X. New insights into the formation of viable but nonculturable Escherichia coli O157:H7 induced by high-pressure CO2. MBio. 7(4): 1–16 (2016)
Guisbert E, Rhodius VA, Ahuja N, Witkin E, Gross CA. Hfq modulates the sigmaE-mediated envelope stress response and the sigma32-mediated cytoplasmic stress response in Escherichia coli. J. Bacteriol. 189: 1963–1973 (2007)
Acknowledgements
The authors acknowledge the financial support from the Directorate General of Higher Education Ministry of Education and Culture, Republic of Indonesia.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Jameelah, M., Dewanti-Hariyadi, R. & Nurjanah, S. Expression of rpoS, ompA and hfq genes of Cronobacter sakazakii strain Yrt2a during stress and viable but nonculturable state. Food Sci Biotechnol 27, 915–920 (2018). https://doi.org/10.1007/s10068-018-0313-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10068-018-0313-5