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Sarker SA, Sultana S, Reuteler G, Moine D, Descombes P, Charton F, Bourdin G, McCallin S, Ngom-Bru C, Neville T, Akter M, Huq S, Qadri F, Talukdar K, Kassam M, Delley M, Loiseau C, Deng Y, El Aidy S, Berger B, Brüssow H. Oral Phage Therapy of Acute Bacterial Diarrhea With Two Coliphage Preparations: A Randomized Trial in Children From Bangladesh. EBioMedicine 2016; 4:124-37. [PMID: 26981577 PMCID: PMC4776075 DOI: 10.1016/j.ebiom.2015.12.023] [Citation(s) in RCA: 304] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 12/23/2015] [Accepted: 12/27/2015] [Indexed: 02/08/2023] Open
Abstract
Background Antibiotic resistance is rising in important bacterial pathogens. Phage therapy (PT), the use of bacterial viruses infecting the pathogen in a species-specific way, is a potential alternative. Method T4-like coliphages or a commercial Russian coliphage product or placebo was orally given over 4 days to Bangladeshi children hospitalized with acute bacterial diarrhea. Safety of oral phage was assessed clinically and by functional tests; coliphage and Escherichia coli titers and enteropathogens were determined in stool and quantitative diarrhea parameters (stool output, stool frequency) were measured. Stool microbiota was studied by 16S rRNA gene sequencing; the genomes of four fecal Streptococcus isolates were sequenced. Findings No adverse events attributable to oral phage application were observed (primary safety outcome). Fecal coliphage was increased in treated over control children, but the titers did not show substantial intestinal phage replication (secondary microbiology outcome). 60% of the children suffered from a microbiologically proven E. coli diarrhea; the most frequent diagnosis was ETEC infections. Bacterial co-pathogens were also detected. Half of the patients contained phage-susceptible E. coli colonies in the stool. E. coli represented less than 5% of fecal bacteria. Stool ETEC titers showed only a short-lived peak and were otherwise close to the replication threshold determined for T4 phage in vitro. An interim analysis after the enrollment of 120 patients showed no amelioration in quantitative diarrhea parameter by PT over standard care (tertiary clinical outcome). Stool microbiota was characterized by an overgrowth with Streptococcus belonging to the Streptococcus gallolyticus and Streptococcus salivarius species groups, their abundance correlated with quantitative diarrhea outcome, but genome sequencing did not identify virulence genes. Interpretation Oral coliphages showed a safe gut transit in children, but failed to achieve intestinal amplification and to improve diarrhea outcome, possibly due to insufficient phage coverage and too low E. coli pathogen titers requiring higher oral phage doses. More knowledge is needed on in vivo phage–bacterium interaction and the role of E. coli in childhood diarrhea for successful PT. Funding The study was supported by a grant from Nestlé Nutrition and Nestlé Health Science. The trial was registered with Identifier NCT00937274 at ClinicalTrials.gov. Coliphages given orally to children with bacterial diarrhea appeared in the stool, but did not improve clinical outcome. In microbiologically diagnosed E. coli diarrhea, pathogen titers were close to the replication threshold of coliphages. Acute bacterial diarrhea displayed a marked dysbiosis with fecal streptococci that stabilized with recovery from diarrhea.
Antibiotic resistance of bacterial infections reached alarming levels. Phage therapy is a potential alternative antimicrobial. We demonstrated that two different oral phage preparations did not improve acute bacterial diarrhea in children from Bangladesh. We observed fecal excretion of the oral phage, but no major phage amplification in the gut. E. coli pathogen levels were low and the fecal microbiota showed a transient overgrowth with streptococci. Future phage trials should first verify the titer and association of the targeted pathogen with the disease.
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Key Words
- Bacteriophages
- Bangladesh
- Bifidobacterium
- Cfu, colony forming unit
- Children
- Diarrhea
- EAEC, enteroaggregative E. coli
- EPEC, enteropathogenic E. coli
- ETEC, enterotoxigenic E. coli
- Escherichia coli
- M, ColiProteus phage cocktail from Microgen
- ORS, oral rehydration solution
- P, placebo
- PT, phage therapy
- RCT, randomized controlled trial
- Streptococcus
- T, T4 phage cocktail from NRC
- pfu, plaque forming unit
- qPCR, quantitative polymerase chain reaction
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Affiliation(s)
- Shafiqul Alam Sarker
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Shamima Sultana
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Gloria Reuteler
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Deborah Moine
- Nestlé Institute of Health Science, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Patrick Descombes
- Nestlé Institute of Health Science, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Florence Charton
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Gilles Bourdin
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Shawna McCallin
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Catherine Ngom-Bru
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Tara Neville
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Mahmuda Akter
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Sayeeda Huq
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Firdausi Qadri
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Kaisar Talukdar
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Mohamed Kassam
- Nestlé Institute of Health Science, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Michèle Delley
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Chloe Loiseau
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Ying Deng
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Sahar El Aidy
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Bernard Berger
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
| | - Harald Brüssow
- Nestlé Research Centre, Nestec Ltd., Vers-chez-les-Blanc, CH-1000 Lausanne 26, Switzerland
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