Davidson H Hamer

Prof. Davidson H Hamer

orcid

Research Focus & Metrics

Academic Career Length

38Years (1989-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
31 January 2013 in BMC Medicine
Verified
Journal Article
Open access
PDF file
KLKarsten Lunze
Karsten Lunze
DBDavid E Bloom
David E Bloom
DJDean T Jamison
Dean T Jamison
DHDavidson H Hamer
Davidson H Hamer
To provide evidence on the global epidemiological situation of neonatal hypothermia and to provide recommendations for future policy and research directions.

1 August 2011 in The Lancet
Verified
Journal Article
Open access
DZDejan Zurovac
Dejan Zurovac
RSRaymond K Sudoi
Raymond K Sudoi
WAWillis S Akhwale
Willis S Akhwale
MNMoses Ndiritu
Moses Ndiritu
DHDavidson H Hamer
Davidson H Hamer
RSRobert W Snow
Robert W Snow
Health workers' malaria case-management practices often differ from national guidelines. We assessed whether text-message reminders sent to health workers' mobile phones could improve and maintain their adherence to treatment guidelines for outpatient paediatric malaria in Kenya. From March 6, 2009, to May 31, 2010, we did a cluster-randomised controlled trial at 107 rural health facilities in 11 districts in coastal and western Kenya. With a computer-generated sequence, health facilities were randomly allocated to either the intervention group, in which all health workers received text messages on their personal mobile phones on malaria case-management for 6 months, or the control group, in which health workers did not receive any text messages. Health workers were not masked to the intervention, although patients were unaware of whether they were in an intervention or control facility. The primary outcome was correct management with artemether-lumefantrine, defined as a dichotomous composite indicator of treatment, dispensing, and counselling tasks concordant with Kenyan national guidelines. The primary analysis was by intention to treat. The trial is registered with Current Controlled Trials, ISRCTN72328636. 119 health workers received the intervention. Case-management practices were assessed for 2269 children who needed treatment (1157 in the intervention group and 1112 in the control group). Intention-to-treat analysis showed that correct artemether-lumefantrine management improved by 23·7 percentage-points (95% CI 7·6-40·0; p=0·004) immediately after intervention and by 24·5 percentage-points (8·1-41·0; p=0·003) 6 months later. In resource-limited settings, malaria control programmes should consider use of text messaging to improve health workers' case-management practices. The Wellcome Trust.

1 December 2018 in The Lancet Global Health
Verified
Journal Article
Open access
IAImran Ahmed
Imran Ahmed
SASaid Mohammed Ali
Said Mohammed Ali
SASeeba Amenga-Etego
Seeba Amenga-Etego
SAShabina Ariff
Shabina Ariff
RBRajiv Bahl
Rajiv Bahl
AZAnita Zaidi
Anita Zaidi
Modelled mortality estimates have been useful for health programmes in low-income and middle-income countries. However, these estimates are often based on sparse and low-quality data. We aimed to generate high quality data about the burden, timing, and causes of maternal deaths, stillbirths, and neonatal deaths in south Asia and sub-Saharan Africa. In this prospective cohort study done in 11 community-based research sites in south Asia and sub-Saharan Africa, between July, 2012, and February, 2016, we conducted population-based surveillance of women of reproductive age (15-49 years) to identify pregnancies, which were followed up to birth and 42 days post partum. We used standard operating procedures, data collection instruments, training, and standardisation to harmonise study implementation across sites. Verbal autopsies were done for deaths of all women of reproductive age, neonatal deaths, and stillbirths. Physicians used standardised methods for cause of death assignment. Site-specific rates and proportions were pooled at the regional level using a meta-analysis approach. We identified 278 186 pregnancies and 263 563 births across the study sites, with outcomes ascertained for 269 630 (96·9%) pregnancies, including 8761 (3·2%) that ended in miscarriage or abortion. Maternal mortality ratios in sub-Saharan Africa (351 per 100 000 livebirths, 95% CI 168-732) were similar to those in south Asia (336 per 100 000 livebirths, 247-458), with far greater variability within sites in sub-Saharan Africa. Stillbirth and neonatal mortality rates were approximately two times higher in sites in south Asia than in sub-Saharan Africa (stillbirths: 35·1 per 1000 births, 95% CI 28·5-43·1 vs 17·1 per 1000 births, 12·5-25·8; neonatal mortality: 43·0 per 1000 livebirths, 39·0-47·3 vs 20·1 per 1000 livebirths, 14·6-27·6). 40-45% of pregnancy-related deaths, stillbirths, and neonatal deaths occurred during labour, delivery, and the 24 h postpartum period in both regions. Obstetric haemorrhage, non-obstetric complications, hypertensive disorders of pregnancy, and pregnancy-related infections accounted for more than three-quarters of maternal deaths and stillbirths. The most common causes of neonatal deaths were perinatal asphyxia (40%, 95% CI 39-42, in south Asia; 34%, 32-36, in sub-Saharan Africa) and severe neonatal infections (35%, 34-36, in south Asia; 37%, 34-39 in sub-Saharan Africa), followed by complications of preterm birth (19%, 18-20, in south Asia; 24%, 22-26 in sub-Saharan Africa). These results will contribute to improved global estimates of rates, timing, and causes of maternal and newborn deaths and stillbirths. Our findings imply that programmes in sub-Saharan Africa and south Asia need to further intensify their efforts to reduce mortality rates, which continue to be high. The focus on improving the quality of maternal intrapartum care and immediate newborn care must be further enhanced. Efforts to address perinatal asphyxia and newborn infections, as well as preterm birth, are critical to achieving survival goals in the Sustainable Development Goals era. Bill & Melinda Gates Foundation.

1 October 2010 in Clinical Infectious Diseases
Verified
Journal Article
Open access
PDF file
NHNatasha S. Hochberg
Natasha S. Hochberg
DHDavidson H Hamer
Davidson H Hamer
JHJames M. Hughes
James M. Hughes
MWMary E. Wilson
Mary E. Wilson
Anisakidosis, human infection with nematodes of the family Anisakidae, is caused most commonly by Anisakis simplex and Pseudoterranova decipiens. Acq

18 August 2004 in JAMA
Verified
Journal Article
Open access
PDF file
SMSimin Nikbin Meydani
Simin Nikbin Meydani
LLLynette S. Leka
Lynette S. Leka
BFBasil C. Fine
Basil C. Fine
GDGerard E. Dallal
Gerard E. Dallal
GKGerald T. Keusch
Gerald T. Keusch
DHDavidson H Hamer
Davidson H Hamer
Infections, particularly respiratory tract infections, are common in elderly individuals, resulting in decreased daily activity, prolonged recovery times, increased health care service use, and more frequent complications, including death.1-11 In the United States, an estimated 43% of elderly persons will be admitted to a nursing home, with more than 85% of them admitted to long-term (>1 year) care facilities.12 Infections occur more frequently in nursing home residents than among independent-living elderly,2-10,13 and respiratory tract infections are a major cause of morbidity and mortality.9,14,15 Contributing to the increased incidence of infection with age is the well-described decline in immune response.16 For example, those who have diminished delayed-type hypersensitivity skin test responses have higher morbidity and mortality from cancer, pneumonia, and postoperative complications.17-19

1 January 2004 in Journal of Travel Medicine
Verified
Journal Article
Open access
PDF file
DHDavidson H Hamer
Davidson H Hamer
BCBradley A. Connor
Bradley A. Connor
Background. Large numbers of United States residents travel each year to countries where malaria, hepatitis A, hepatitis B and other vaccine-preventabl