1
|
Jaiswal VK, Montorsi F, Aleotti F, Segatta F, Keefer D, Mukamel S, Nenov A, Conti I, Garavelli M. Ultrafast photochemistry and electron-diffraction spectra in n → (3s) Rydberg excited cyclobutanone resolved at the multireference perturbative level. J Chem Phys 2024; 160:164316. [PMID: 38686819 DOI: 10.1063/5.0203624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 04/10/2024] [Indexed: 05/02/2024] Open
Abstract
We study the ultrafast time evolution of cyclobutanone excited to the singlet n → Rydberg state through non-adiabatic surface-hopping simulationsperformed at extended multi-state complete active space second-order perturbation (XMS-CASPT2) level of theory. These dynamics predict relaxation to the ground-state with a timescale of 822 ± 45 fs with minimal involvement of the triplets. The major relaxation path to the ground-state involves a three-state degeneracy region and leads to a variety of fragmented photoproducts. We simulate the resulting time-resolved electron-diffraction spectra, which track the relaxation of the excited state and the formation of various photoproducts in the ground state.
Collapse
Affiliation(s)
- V K Jaiswal
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - F Montorsi
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - F Aleotti
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - F Segatta
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Daniel Keefer
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Mainz 55128, Germany
| | - Shaul Mukamel
- Department of Chemistry and Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, USA
| | - A Nenov
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - I Conti
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - M Garavelli
- Dipartimento di Chimica industriale "Toso Montanari," Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| |
Collapse
|
2
|
Ahmed T, Chisti MJ, Rahman MW, Alam T, Ahmed D, Parvin I, Kabir MF, Sazawal S, Dhingra P, Dutta A, Deb S, Chouhan A, Sharma AK, Jaiswal VK, Dhingra U, Walson JL, Singa BO, Pavlinac PB, McGrath CJ, Nyabinda C, Deichsel EL, Anyango M, Kariuki KM, Rwigi D, Tornberg-Belanger SN, Kotloff KL, Sow SO, Tapia MD, Haidara FC, Mehta A, Coulibaly F, Badji H, Permala-Booth J, Tennant SM, Malle D, Bar-Zeev N, Dube Q, Freyne B, Cunliffe N, Ndeketa L, Witte D, Ndamala C, Cornick J, Qamar FN, Yousafzai MT, Qureshi S, Shakoor S, Thobani R, Hotwani A, Kabir F, Mohammed J, Manji K, Duggan CP, Kisenge R, Sudfeld CR, Kibwana U, Somji S, Bakari M, Msemwa C, Samma A, Bahl R, De Costa A, Simon J, Ashorn P. Effect of 3 Days of Oral Azithromycin on Young Children With Acute Diarrhea in Low-Resource Settings: A Randomized Clinical Trial. JAMA Netw Open 2021; 4:e2136726. [PMID: 34913980 PMCID: PMC8678692 DOI: 10.1001/jamanetworkopen.2021.36726] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 09/21/2021] [Indexed: 12/25/2022] Open
Abstract
Importance World Health Organization (WHO) guidelines do not recommend routine antibiotic use for children with acute watery diarrhea. However, recent studies suggest that a significant proportion of such episodes have a bacterial cause and are associated with mortality and growth impairment, especially among children at high risk of diarrhea-associated mortality. Expanding antibiotic use among dehydrated or undernourished children may reduce diarrhea-associated mortality and improve growth. Objective To determine whether the addition of azithromycin to standard case management of acute nonbloody watery diarrhea for children aged 2 to 23 months who are dehydrated or undernourished could reduce mortality and improve linear growth. Design, Setting, and Participants The Antibiotics for Children with Diarrhea (ABCD) trial was a multicountry, randomized, double-blind, clinical trial among 8266 high-risk children aged 2 to 23 months presenting with acute nonbloody diarrhea. Participants were recruited between July 1, 2017, and July 10, 2019, from 36 outpatient hospital departments or community health centers in a mixture of urban and rural settings in Bangladesh, India, Kenya, Malawi, Mali, Pakistan, and Tanzania. Each participant was followed up for 180 days. Primary analysis included all randomized participants by intention to treat. Interventions Enrolled children were randomly assigned to receive either oral azithromycin, 10 mg/kg, or placebo once daily for 3 days in addition to standard WHO case management protocols for the management of acute watery diarrhea. Main Outcomes and Measures Primary outcomes included all-cause mortality up to 180 days after enrollment and linear growth faltering 90 days after enrollment. Results A total of 8266 children (4463 boys [54.0%]; mean [SD] age, 11.6 [5.3] months) were randomized. A total of 20 of 4133 children in the azithromycin group (0.5%) and 28 of 4135 children in the placebo group (0.7%) died (relative risk, 0.72; 95% CI, 0.40-1.27). The mean (SD) change in length-for-age z scores 90 days after enrollment was -0.16 (0.59) in the azithromycin group and -0.19 (0.60) in the placebo group (risk difference, 0.03; 95% CI, 0.01-0.06). Overall mortality was much lower than anticipated, and the trial was stopped for futility at the prespecified interim analysis. Conclusions and Relevance The study did not detect a survival benefit for children from the addition of azithromycin to standard WHO case management of acute watery diarrhea in low-resource settings. There was a small reduction in linear growth faltering in the azithromycin group, although the magnitude of this effect was not likely to be clinically significant. In low-resource settings, expansion of antibiotic use is not warranted. Adherence to current WHO case management protocols for watery diarrhea remains appropriate and should be encouraged. Trial Registration ClinicalTrials.gov Identifier: NCT03130114.
Collapse
Affiliation(s)
- Tahmeed Ahmed
- Nutrition and Clinical Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Mohammod Jobayer Chisti
- Nutrition and Clinical Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Muhammad Waliur Rahman
- Nutrition and Clinical Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Tahmina Alam
- Nutrition and Clinical Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Dilruba Ahmed
- Laboratory Sciences and Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Irin Parvin
- Nutrition and Clinical Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Md Farhad Kabir
- Nutrition and Clinical Services Division, International Centre for Diarrheal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Sunil Sazawal
- Center for Public Health Kinetics, New Delhi, Delhi, India
| | | | - Arup Dutta
- Center for Public Health Kinetics, New Delhi, Delhi, India
| | - Saikat Deb
- Center for Public Health Kinetics, New Delhi, Delhi, India
| | | | | | | | - Usha Dhingra
- Center for Public Health Kinetics, New Delhi, Delhi, India
| | - Judd L Walson
- Childhood Acute Illness and Nutrition Network, Nairobi, Kenya
- Department of Global Health, University of Washington, Seattle
- Department of Pediatrics, University of Washington, Seattle
- Department of Medicine (Allergy and Infectious Diseases), University of Washington, Seattle
| | - Benson O Singa
- Childhood Acute Illness and Nutrition Network, Nairobi, Kenya
- Kenya Medical Research Institute, Nairobi, Kenya
| | | | | | | | - Emily L Deichsel
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
| | | | | | - Doreen Rwigi
- Kenya Medical Research Institute, Nairobi, Kenya
| | | | - Karen L Kotloff
- Department of Pediatrics, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
- Department of Medicine, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
| | - Samba O Sow
- Centre pour le Développement des Vaccins, Bamako, Mali
| | - Milagritos D Tapia
- Department of Pediatrics, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
- Department of Medicine, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
| | - Fadima Cheick Haidara
- Division of Advanced Primary Health Care Research and Clinical Trials, Centre pour le Développement des Vaccins, Bamako, Mali
| | - Ashka Mehta
- Department of Pediatrics, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
- Department of Medicine, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
| | - Flanon Coulibaly
- Division of Advanced Primary Health Care Research and Clinical Trials, Centre pour le Développement des Vaccins, Bamako, Mali
| | - Henry Badji
- Division of Clinical Microbiology and Molecular Biology, Centre pour le Développement des Vaccins, Bamako, Mali
| | - Jasnehta Permala-Booth
- Department of Medicine, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
| | - Sharon M Tennant
- Department of Medicine, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore
| | - Dramane Malle
- Division of Clinical Microbiology and Molecular Biology, Centre pour le Développement des Vaccins, Bamako, Mali
| | - Naor Bar-Zeev
- International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Queen Dube
- Department of Pediatrics, Queen Elizabeth Central Hospital, Blantyre, Malawi
| | - Bridget Freyne
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Institute of Infection, Veterinary and Ecological Sciences, The University of Liverpool, Blantyre, Malawi
| | - Nigel Cunliffe
- National Institutes of Health Research Health Protection Research Unit in Gastrointestinal Infections, University of Liverpool, Liverpool, United Kingdom
| | - Latif Ndeketa
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Liverpool School of Tropical Medicine, Blantyre, Malawi
| | - Desiree Witte
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - Chifundo Ndamala
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - Jennifer Cornick
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Institute of Infection, Veterinary and Ecological Sciences, The University of Liverpool, Blantyre, Malawi
| | - Farah Naz Qamar
- Department of Pediatrics and Child Heath, Aga Khan University, Karachi, Pakistan
| | | | - Shahida Qureshi
- Department of Pathology and Laboratory Medicine, Aga Khan University, Karachi, Pakistan
| | - Sadia Shakoor
- Department of Pathology and Laboratory Medicine, Aga Khan University, Karachi, Pakistan
| | - Rozina Thobani
- Department of Pediatrics and Child Heath, Aga Khan University, Karachi, Pakistan
| | - Aneeta Hotwani
- Department of Pediatrics and Child Heath, Aga Khan University, Karachi, Pakistan
| | - Furqan Kabir
- Department of Pediatrics and Child Heath, Aga Khan University, Karachi, Pakistan
| | - Jan Mohammed
- Department of Pediatrics and Child Heath, Aga Khan University, Karachi, Pakistan
| | - Karim Manji
- Department of Pediatrics and Child Health, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Christopher P Duggan
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Rodrick Kisenge
- Department of Pediatrics and Child Health, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Christopher R Sudfeld
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Upendo Kibwana
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Sarah Somji
- Department of Pediatrics and Child Health, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Mohamed Bakari
- Department of Pediatrics and Child Health, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Cecylia Msemwa
- Department of Microbiology and Immunology, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Abraham Samma
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Rajiv Bahl
- Department of Maternal, Child, and Adolescent Health and Aging, World Health Organization, Geneva, Switzerland
| | - Ayesha De Costa
- Department of Maternal, Child, and Adolescent Health and Aging, World Health Organization, Geneva, Switzerland
| | - Jonathon Simon
- Department of Maternal, Child, and Adolescent Health and Aging, World Health Organization, Geneva, Switzerland
| | - Per Ashorn
- Department of Maternal, Child, and Adolescent Health and Aging, World Health Organization, Geneva, Switzerland
| |
Collapse
|
5
|
Dongol S, Thompson CN, Clare S, Nga TVT, Duy PT, Karkey A, Arjyal A, Koirala S, Khatri NS, Maskey P, Poudel S, Jaiswal VK, Vaidya S, Dougan G, Farrar JJ, Dolecek C, Basnyat B, Baker S. The microbiological and clinical characteristics of invasive salmonella in gallbladders from cholecystectomy patients in kathmandu, Nepal. PLoS One 2012; 7:e47342. [PMID: 23077595 PMCID: PMC3471863 DOI: 10.1371/journal.pone.0047342] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 09/10/2012] [Indexed: 11/19/2022] Open
Abstract
Gallbladder carriage of invasive Salmonella is considered fundamental in sustaining typhoid fever transmission. Bile and tissue was obtained from 1,377 individuals undergoing cholecystectomy in Kathmandu to investigate the prevalence, characteristics and relevance of invasive Salmonella in the gallbladder in an endemic area. Twenty percent of bile samples contained a Gram-negative organism, with Salmonella Typhi and Salmonella Paratyphi A isolated from 24 and 22 individuals, respectively. Gallbladders that contained Salmonella were more likely to show evidence of acute inflammation with extensive neutrophil infiltrate than those without Salmonella, corresponding with higher neutrophil and lower lymphocyte counts in the blood of Salmonella positive individuals. Antimicrobial resistance in the invasive Salmonella isolates was limited, indicating that gallbladder colonization is unlikely to be driven by antimicrobial resistance. The overall role of invasive Salmonella carriage in the gallbladder is not understood; here we show that 3.5% of individuals undergoing cholecystectomy in this setting have a high concentration of antimicrobial sensitive, invasive Salmonella in their bile. We predict that such individuals will become increasingly important if current transmission mechanisms are disturbed; prospectively identifying these individuals is, therefore, paramount for rapid local and regional elimination.
Collapse
Affiliation(s)
- Sabina Dongol
- Oxford University Clinical Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Corinne N. Thompson
- The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Oxford University, Oxford, United Kingdom
| | - Simon Clare
- The Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom
| | - Tran Vu Thieu Nga
- The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Pham Thanh Duy
- The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Abhilasha Karkey
- Oxford University Clinical Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Amit Arjyal
- Oxford University Clinical Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Samir Koirala
- Oxford University Clinical Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Nely Shrestha Khatri
- Oxford University Clinical Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | | | | | | | | | - Gordon Dougan
- The Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom
| | - Jeremy J. Farrar
- The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Oxford University, Oxford, United Kingdom
| | - Christiane Dolecek
- The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Oxford University, Oxford, United Kingdom
| | - Buddha Basnyat
- Oxford University Clinical Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Stephen Baker
- The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine, Oxford University, Oxford, United Kingdom
- * E-mail:
| |
Collapse
|