ORCID Profile
0000-0002-4144-1094
Current Organisation
World Health Organization
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Publisher: Journal of Infection in Developing Countries
Date: 15-12-2012
DOI: 10.3855/JIDC.2448
Abstract: This item has no abstract. Follow the link below to acccess the full text.
Publisher: Wiley
Date: 20-04-2011
Publisher: Springer Science and Business Media LLC
Date: 16-04-2014
Publisher: Springer Science and Business Media LLC
Date: 09-06-2021
Publisher: American Society for Microbiology
Date: 02-2012
DOI: 10.1128/JCM.05785-11
Abstract: Vibrio cholerae O1 in a river water specimen in South Africa was reported, and a public health response followed in order to prevent an outbreak. Further investigation determined this to be a pseudoalert of V. cholerae O1, possibly linked to laboratory contamination. Following culture of bacteria from the water specimen, the testing laboratory possibly contaminated the culture with a V. cholerae O1 reference strain and then mistakenly reported isolation of V. cholerae O1.
Publisher: Public Library of Science (PLoS)
Date: 02-08-2012
Publisher: Springer Science and Business Media LLC
Date: 30-05-2022
Publisher: Elsevier BV
Date: 06-2023
Publisher: Centers for Disease Control and Prevention (CDC)
Date: 12-2013
Publisher: Centers for Disease Control and Prevention (CDC)
Date: 09-2010
Publisher: European Centre for Disease Control and Prevention (ECDC)
Date: 22-10-2009
DOI: 10.2807/ESE.14.42.19369-EN
Abstract: We provide an interim report on pandemic H1N1 influenza activity in South Africa, with a focus on the epidemiology and factors associated with deaths. Following the importation of the virus on 14 July 2009, and the epidemic peak during the week starting 3 August, the incidence in South Africa has declined. A total of 12,331 cases and 91 deaths have been laboratory-confirmed as of 12 October 2009. Age distribution and risk groups were similar to those observed elsewhere. The median age of patients who died (33.5 years) was significantly higher than that of the non-fatal cases (15.0 years, p .01). The most common underlying conditions among fatal cases were infection with human immunodeficiency virus (17/32 tested) and pregnancy (25/45 women of reproductive age). Active tuberculosis coinfection was present in seven of 72 fatal cases. These findings should be taken into consideration when planning vaccination strategies for 2010.
Publisher: Springer Science and Business Media LLC
Date: 06-10-2015
Publisher: Springer Science and Business Media LLC
Date: 2013
Publisher: Springer Science and Business Media LLC
Date: 21-03-2014
Publisher: Informa UK Limited
Date: 09-11-2015
Publisher: Elsevier BV
Date: 07-2018
Publisher: Public Library of Science (PLoS)
Date: 20-02-2013
Publisher: Centers for Disease Control and Prevention (CDC)
Date: 07-2018
Publisher: South African Medical Association NPC
Date: 04-04-2011
DOI: 10.7196/SAMJ.4544
Abstract: During 2008, Rift Valley fever (RVF) virus re-emerged in South Africa as focal outbreaks in several provinces. To investigate an outbreak affecting cattle farmers and farm workers, and the staff and students of a veterinary school, assess the prevalence of infection during the outbreak, document the clinical presentation of cases, and identify potential risk factors. We conducted a cross-sectional serological survey of exposed veterinarians and farmers, who were examined to determine the presence of current or recent illness. Blood specimens were collected for virus isolation, nucleic acid detection and serology. A subset was interviewed using a standardised questionnaire to obtain data on recent exposures and risk factors for infection. Of 53 participants potentially exposed to infected domestic ruminants, 15% had evidence of recent infection and 4% evidence of past exposure to the RVF virus. The prevalence of acute infection was 21% in veterinarians compared with 9% in farmers and farm workers. After a mean incubation period of 4.3 days, the most frequent symptoms experienced included myalgia (100%), headache (88%) and malaise (75%). No asymptomatic cases were identified. Transmission, by direct contact with infected animals was the major risk factor in these professional groups. Performing animal autopsies was significantly associated with acute infection (risk ratio 16.3, 95% confidence interval 2.3 - 114.2). Increased risks associated with veterinary practices highlight a need for the use of personal protective equipment, and identify veterinarians as a primary target group for future vaccination.
Publisher: Public Library of Science (PLoS)
Date: 20-03-2015
Publisher: European Centre for Disease Control and Prevention (ECDC)
Date: 17-06-2021
DOI: 10.2807/1560-7917.ES.2021.26.24.2100509
Abstract: We present a global analysis of the spread of recently emerged SARS-CoV-2 variants and estimate changes in effective reproduction numbers at country-specific level using sequence data from GISAID. Nearly all investigated countries demonstrated rapid replacement of previously circulating lineages by the World Health Organization-designated variants of concern, with estimated transmissibility increases of 29% (95% CI: 24–33), 25% (95% CI: 20–30), 38% (95% CI: 29–48) and 97% (95% CI: 76–117), respectively, for B.1.1.7, B.1.351, P.1 and B.1.617.2.
Publisher: Elsevier BV
Date: 12-2000
DOI: 10.1071/HI00426
Publisher: Oxford University Press (OUP)
Date: 20-11-2012
Publisher: Australian Government Department of Health and Aged Care
Date: 15-06-2021
Abstract: This report summarises the incidence of diseases potentially transmitted by food in Australia, and details outbreaks associated with food that occurred during 2013–2015. OzFoodNet sites reported an increasing number of notifications of 12 diseases or conditions vthat may be transmitted by food (botulism c ylobacteriosis cholera hepatitis A hepatitis E haemolytic uraemic syndrome (HUS) listeriosis Salmonella Paratyphi (paratyphoid fever) infection salmonellosis shigellosis Shiga toxin-producing Escherichia coli (STEC) infection and Salmonella Typhi (typhoid fever) infection), with a total of 28,676 notifications received in 2013 37,958 in 2014 and 41,226 in 2015. The most commonly-notified conditions were c ylobacteriosis (a mean of 19,061 notifications per year over 2013–2015) and salmonellosis (a mean of 15,336 notifications per year over 2013–2015). Over these three years, OzFoodNet sites also reported 512 outbreaks of gastrointestinal illness caused by foodborne, animal-to-person or waterborne disease, affecting 7,877 people, and resulting in 735 hospitalisations and 18 associated deaths. The majority of outbreaks (452/512 88%) were due to foodborne or suspected foodborne transmission. The remaining 12% of outbreaks were due to waterborne or suspected waterborne transmission (57 outbreaks) and animal-to-human transmission (three outbreaks). Foodborne and suspected foodborne outbreaks affected 7,361 people, resulting in 705 hospitalisations and 18 deaths. Salmonella was the most common aetiological agent identified in foodborne outbreaks (239/452 53%), and restaurants were the most frequently-reported food preparation setting (211/452 47%). There were 213 foodborne outbreaks (47%) attributed to a single food commodity during 2013–2015, with 58% (124/213) associated with the consumption of eggs and egg-based dishes.
Publisher: AMPCo
Date: 11-2017
DOI: 10.5694/MJA16.01340
Abstract: To describe trends in the age-specific incidence of serogroup B invasive meningococcal disease (IMD) in Australia, 1999-2015. Analysis in February 2017 of de-identified notification data from the Australian National Notifiable Diseases Surveillance System of all notifications of IMD in Australia with a recorded diagnosis date during 1999-2015.Major outcomes: IMD notification rates in Australia, 1999-2015, by age, serogroup, Indigenous status, and region. The incidence of meningococcal serogroup B (MenB) disease declined progressively from 1.52 cases per 100 000 population in 2001 to 0.47 per 100 000 in 2015. During 2006-2015, MenB accounted for 81% of IMD cases with a known serogroup its highest incidence was among infants under 12 months of age (11.1 [95% CI, 9.81-12.2] per 100 000), children aged 1-4 years (2.82 [95% CI, 2.52-3.15] per 100 000), and adolescents aged 15-19 years (2.40 [95% CI, 2.16-2.67] per 100 000). Among the 473 infants under 2 years of age with MenB, 43% were under 7 months and 69% under 12 months of age. The incidence of meningococcal serogroup C (MenC) disease prior to the introduction of the MenC vaccine in 2003 was much lower in infants than for MenB (2.60 cases per 100 000), the rate peaking in people aged 15-19 years (3.32 per 100 000) the overall case fatality rate was also higher (MenC, 8% MenB, 4%). The incidence of MenB disease was significantly higher among Indigenous than non-Indigenous Australians during 2006-2015 (incidence rate ratio [IRR], 3.8 95% CI, 3.3-4.5). Based on disease incidence at its current low endemic levels, priority at risk age opulation groups for MenB vaccination include all children between 2 months and 5 years of age, Indigenous children under 10 years of age, and all adolescents aged 15-19 years. Given marked variation in meningococcal disease trends over time, close scrutiny of current epidemiologic data is essential.
Publisher: Public Library of Science (PLoS)
Date: 16-11-2012
Location: South Africa
Location: Australia
No related grants have been discovered for Brett Archer.