Epidemiologic investigation of a cluster of deaths due to eating fried rice balls intentionally tainted with Quinalphos, Sironko District, Uganda, a case series, 2017

Background: Quinalphos is an organophosphate chemical chiefly used as a pesticide. On 13 November 2017, a cluster of unexplained deaths was reported in Village X, Sironko District, Eastern Uganda. We investigated to identify the scope and exposures for the cluster of deaths, and recommend control-measures. Case Presentation: We defined a suspected case as acute onset from 1-11 November 2017 of abdominal pain plus ≥1 of the following: vomiting, nasal bleeding, sweating, confusion, convulsion, loss of consciousness in a Village X resident. A confirmed case was a suspected case with a positive toxicological test of quinalphos by liquid chromatography. We reviewed clinical records and conducted active community case-finding. We investigated the exposure histories of case-patients, and inspected their homes for potential exposures. We identified 4 cases (including 1 confirmed) from a single household. The age range was six to fifty-two years; attack rate: 50%, 4/8, and case fatality rate: ¾ 75%. Symptoms included abdominal pain (100%), vomiting (75%), self-reported fever (50%), confusion (25%), convulsion (25%), loss of consciousness (25%), nasal bleeding (25%). Of the 4 case-patients, 3 had onset at 09:00hours and 1 at 19:00hours on 9 November 2017. The 4 case-patients shared 5 “bolingos” (fried rice balls) at 14:00hours, which had been given to case-patient A, a primary two level pupil (equivalent to the second grade in the US system) by an unknown person on her way home from school on 8 November. Case-patient A ate 1 bolingo and died within 35 hours, case-patient B ate 2 bolingos and died within 27 hours, case-patient D ate 1½ bolingo and died in 45 hours, case-patient C ate ½ bolingo, developed mild symptoms and survived. Additionally, 8 chickens also ate crumbs of the bolingo and died. A blood specimen of the lone survivor tested positive for quinalphos. After reading our report, police conducted a criminal investigation and found that the affected family had land disputes with a neighbour. One man was arrested and is awaiting trial. Conclusion: This fatal food-poisoning cluster of deaths was caused by eating bolingos (fried rice balls) intentionally tainted with quinalphos. We recommended strict control of pesticides, assessment of availability and use of pesticides in communities, and re-orientation of clinicians on case-presentation and management of organophosphate poisoning

Prevalence, correlates of occupational percutaneous injuries and use of post exposure prophylaxis against HIV, Hepatitis B among health workers in Kampala, Uganda-May 201

Introduction: Of the 3 million percutaneous exposures that occur annually among health workers (HWs), 90% are in low-income countries. The estimated average prevalence of percutaneous exposures among health workers in Uganda was 70% in 2009. However, utilization of post exposure prophylaxis (PEP) following percutaneous exposure remains largely undetermined. We determined the utilization of PEP for HIV and Hepatitis B (Hep B) following percutaneous injuries (PIs) among clinical health workers in Kampala. Methods: In a cross-sectional study, 709 HWs were selected and enrolled using multi-stage sampling from seven health facilities in Kampala City. Data were collected using a semi-structured questionnaire and a facility checklist. Modified Poisson regression modelling was used to estimate prevalence ratios (PRs) of PEP utilization. Results: One hundred and ninety-seven (28%) HWs had sustained PIs in the preceding 12 months with a Hep B vaccination prevalence of 18%. Twenty-nine (15%) of exposed HWs initiated HIV-PEP and one (0.5%) Hepatitis B-PEP. Factors associated with PEP uptake were 1-5years of professional experience (PR= 0.29 95% confidence interval (CI) (0.1-0.92)) compared to less than a year. Being an intern doctor (PR= 0.02 95% CI (<0.01-0.15)), laboratory technologist (PR= 0.05 95% CI (<0.01- 0.51)), nurse (PR= 0.09 95% CI (0.01-0.6)), medical/paramedical student (PR= 0.03 95% CI (<0.01-0.17)) compared to being a consultant. Twenty (69%) completed HIVPEP treatment and one (100%) completed Hepatitis B-PEP treatment. Six of seven health facilities lacked a reporting procedure following percutaneous injury.Conclusion: The prevalence of percutaneous injuries among clinical health workers in Kampala's public health facilities is high while the uptake of PEP therapy is still low. Kampala Capital City Authority should step up measures to ensure HW safety including mandatory Hepatitis B vaccination, occupational exposure surveillance especially targeting lower-level health facilities and HWs with a year or less of clinical experience

The COVID-19 pandemic in the African continent.

In December 2019, a new coronavirus, severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and associated disease, coronavirus disease 2019 (COVID-19), was identified in China. This virus spread quickly and in March, 2020, it was declared a pandemic. Scientists predicted the worst scenario to occur in Africa since it was the least developed of the continents in terms of human development index, lagged behind others in achievement of the United Nations sustainable development goals (SDGs), has inadequate resources for provision of social services, and has many fragile states. In addition, there were relatively few research reporting findings on COVID-19 in Africa. On the contrary, the more developed countries reported higher disease incidences and mortality rates. However, for Africa, the earlier predictions and modelling into COVID-19 incidence and mortality did not fit into the reality. Therefore, the main objective of this forum is to bring together infectious diseases and public health experts to give an overview of COVID-19 in Africa and share their thoughts and opinions on why Africa behaved the way it did. Furthermore, the experts highlight what needs to be done to support Africa to consolidate the status quo and overcome the negative effects of COVID-19 so as to accelerate attainment of the SDGs

Marburg virus disease outbreak in Kween District Uganda, 2017: Epidemiological and laboratory findings.

INTRODUCTION: In October 2017, a blood sample from a resident of Kween District, Eastern Uganda, tested positive for Marburg virus. Within 24 hour of confirmation, a rapid outbreak response was initiated. Here, we present results of epidemiological and laboratory investigations. METHODS: A district task force was activated consisting of specialised teams to conduct case finding, case management and isolation, contact listing and follow up, sample collection and testing, and community engagement. An ecological investigation was also carried out to identify the potential source of infection. Virus isolation and Next Generation sequencing were performed to identify the strain of Marburg virus. RESULTS: Seventy individuals (34 MVD suspected cases and 36 close contacts of confirmed cases) were epidemiologically investigated, with blood samples tested for MVD. Only four cases met the MVD case definition; one was categorized as a probable case while the other three were confirmed cases. A total of 299 contacts were identified; during follow- up, two were confirmed as MVD. Of the four confirmed and probable MVD cases, three died, yielding a case fatality rate of 75%. All four cases belonged to a single family and 50% (2/4) of the MVD cases were female. All confirmed cases had clinical symptoms of fever, vomiting, abdominal pain and bleeding from body orifices. Viral sequences indicated that the Marburg virus strain responsible for this outbreak was closely related to virus strains previously shown to be circulating in Uganda. CONCLUSION: This outbreak of MVD occurred as a family cluster with no additional transmission outside of the four related cases. Rapid case detection, prompt laboratory testing at the Uganda National VHF Reference Laboratory and presence of pre-trained, well-prepared national and district rapid response teams facilitated the containment and control of this outbreak within one month, preventing nationwide and global transmission of the disease

Epidemiologic Investigation of a Cluster of Deaths due to Eating Fried Rice Balls Intentionally Tainted with Quinalphos, Sironko District, Uganda, a case series, 2017

Background: Quinalphos is an organophosphate chemical chiefly used as a pesticide. On 13 November 2017, a cluster of unexplained deaths was reported in Village X, Sironko District, Eastern Uganda. We investigated to identify the scope and exposures for the cluster of deaths, and recommend control-measures. Case Presentation: We defined a suspected case as acute onset from 1-11 November 2017 of abdominal pain plus ≥1 of the following: vomiting, nasal bleeding, sweating, confusion, convulsion, loss of consciousness in a Village X resident. A confirmed case was a suspected case with a positive toxicological test of quinalphos by liquid chromatography. We reviewed clinical records and conducted active community case-finding. We investigated the exposure histories of case-patients, and inspected their homes for potential exposures. We identified 4 cases (including 1 confirmed) from a single household. The age range was six to fifty-two years; attack rate: 50%, 4/8, and case fatality rate: ¾ 75%. Symptoms included abdominal pain (100%), vomiting (75%), selfreported fever (50%), confusion (25%), convulsion (25%), loss of consciousness (25%), nasal bleeding (25%). Of the 4 case-patients, 3 had onset at 09:00hours and 1 at 19:00hours on 9 November 2017. The 4 case-patients shared 5 “bolingos” (fried rice balls) at 14:00hours, which had been given to case-patient A, a primary two level pupil (equivalent to the second grade in the US system) by an unknown person on her way home from school on 8 November. Case-patient A ate 1 bolingo and died within 35 hours, case-patient B ate 2 bolingos and died within 27 hours, case-patient D ate 1½ bolingo and died in 45 hours, case-patient C ate ½ bolingo, developed mild symptoms and survived. Additionally, 8 chickens also ate crumbs of the bolingo and died. A blood specimen of the lone survivor tested positive for quinalphos. After reading our report, police conducted a criminal investigation and found that the affected family had land disputes with a neighbour. One man was arrested and is awaiting trial. Conclusion: This fatal food-poisoning cluster of deaths was caused by eating bolingos (fried rice balls) intentionally tainted with quinalphos. We recommended strict control of pesticides, assessment of availability and use of pesticides in communities, and reorientation of clinicians on case-presentation and management of organophosphate poisoning

Risk Aversion is Associated with Decision Making among Community-Based Older Persons

Background: Risk aversion is associated with many important decisions among younger and middle aged persons, but the association of risk aversion and decision making has not been well studied among older persons who face some of the most significant decisions of their lives. Method: Using data from 606 community-dwelling older persons without dementia from the Rush Memory and Aging Project, an ongoing longitudinal epidemiologic study of aging, we examined the association of risk aversion with decision making. Risk aversion was measured using standard behavioral economics questions in which participants were asked to choose between a certain monetary payment ($15) versus a gamble in which they could gain more than$15 or gain nothing; potential gamble gains ranged from $20 to$300 with the gain amounts varied randomly over questions. Decision making was measured using a 12 item version of the Decision Making Competence Assessment Tool. Findings: In a linear regression model adjusted for age, sex, education, and income, greater risk aversion was associated with poorer decision making (estimate=-1.03, standard error (SE)=0.35, p=0.003). Subsequent analyses showed that the association of risk aversion with decision making was independent of cognitive function. Conclusion: Greater risk aversion is associated with poorer decision making in advanced age and the effect of risk aversion on decision making is above and beyond that of cognition

Internet use and decision making in community-based older adults

Use of the internet may provide tools and resources for better decision making, yet little is known about the association of internet use with decision-making in older persons. We examined this relationship in 66190 community-dwelling older persons without dementia from the Rush Memory and Aging Project, an ongoing longitudinal study of aging. Participants were asked to report if they had access to the internet and how frequently they used the internet and email. A 12-item instrument was used to assess financial and healthcare decision making using materials designed to approximate those used in real world settings. Items were summed to yield a total decision-making score. Associations were tested via linear regression models adjusted for age, sex, race, education, and a measure of global cognitive function. Secondary models further adjusted for income, depression, loneliness, social networks, social support, chronic medical conditions, instrumental activities of daily living, life space size, and health and financial literacy. Interaction terms were used to test for effect modification. Almost 70% of participants had access to the internet, and of those with access, 55% used the internet at least several times a week. Higher frequency of internet use was associated with better financial and healthcare decision making (β=0.11, p=0.002). The association persisted in a fully adjusted model (β=0.08, p=0.024). Interaction models indicated that higher frequency of internet use attenuated the relationships of older age, poorer cognitive function, and lower levels of health and financial literacy with poorer healthcare and financial decision making. These findings indicate that internet use is associated with better health and financial decision making in older persons. Future research is required to understand whether promoting the use of the internet can produce improvements in healthcare and financial decision making

Faster cognitive decline in the years prior to MR imaging is associated with smaller hippocampal volumes in cognitively healthy older persons

Early identification of persons at risk for cognitive decline in aging is critical to optimizing treatment to delay or avoid a clinical diagnosis of mild cognitive impairment (MCI) or dementia due to Alzheimer’s disease (AD). To accomplish early identification, it is essential that trajectories of cognitive change be characterized and associations with established biomarkers of MCI and AD be examined during the phase that older persons are considered cognitively healthy. Here we examined the association of rate of cognitive decline, in the years leading up to structural magnetic resonance imaging, with an established biomarker, hippocampal volume. The sample comprised 211 participants of the Rush Memory and Aging Project who had an average of 5.5 years of cognitive data prior to structural scanning. Results showed that there was significant variability in the trajectories of cognitive change prior to imaging and that faster cognitive decline was associated with smaller hippocampal volumes. Domain-specific analyses suggested that this association was primarily driven by decline in working memory. The results emphasize the importance of closely examining cognitive change and its association with brain structure during the years in which older persons are considered cognitively healthy

Sparring And Neurological Function In Professional Boxers

AbstractDespite increased interest regarding the potentially long-term negative impact of chronic traumatic brain injury (CTBI), limited research had been conducted regarding such injuries and neurological outcomes in real world settings. To increase understanding regarding the relationship between sparring (e.g., number of years actively training for professional boxing) and neurological functioning, professional boxers (n = 237) who competed in Maryland between 2003 to 2008 completed measures regarding sparring exposure (Cumulative Sparring Index; CSI) and performance on tests of cognition (Symbol Digit Modalities Test; SDMT) and balance (Sharpened Romberg Test; SRT). Measures were completed prior to boxing matches. Higher scores on the CSI (increased sparring exposure) were associated with poorer performance on both tests of cognition (SDMT) and balance (SRT). A threshold effect was noted regarding performance on the SDMT, with those reporting CSI values greater than about 150 experiencing a decline in cognition. A history of frequent and/or intense sparring may pose a significant risk for developing boxing associated neurological sequelae. Implementing administration of clinically meaningful tests before bouts, such as the CSI, SDMT, and/or the SRT, as well as documentation of results into the boxer’s physicals or medical profiles may be an important step for improving boxing safety

Marburg virus disease outbreak in Kween District Uganda, 2017: Epidemiological and laboratory findings.

INTRODUCTION:In October 2017, a blood sample from a resident of Kween District, Eastern Uganda, tested positive for Marburg virus. Within 24 hour of confirmation, a rapid outbreak response was initiated. Here, we present results of epidemiological and laboratory investigations. METHODS:A district task force was activated consisting of specialised teams to conduct case finding, case management and isolation, contact listing and follow up, sample collection and testing, and community engagement. An ecological investigation was also carried out to identify the potential source of infection. Virus isolation and Next Generation sequencing were performed to identify the strain of Marburg virus. RESULTS:Seventy individuals (34 MVD suspected cases and 36 close contacts of confirmed cases) were epidemiologically investigated, with blood samples tested for MVD. Only four cases met the MVD case definition; one was categorized as a probable case while the other three were confirmed cases. A total of 299 contacts were identified; during follow- up, two were confirmed as MVD. Of the four confirmed and probable MVD cases, three died, yielding a case fatality rate of 75%. All four cases belonged to a single family and 50% (2/4) of the MVD cases were female. All confirmed cases had clinical symptoms of fever, vomiting, abdominal pain and bleeding from body orifices. Viral sequences indicated that the Marburg virus strain responsible for this outbreak was closely related to virus strains previously shown to be circulating in Uganda. CONCLUSION:This outbreak of MVD occurred as a family cluster with no additional transmission outside of the four related cases. Rapid case detection, prompt laboratory testing at the Uganda National VHF Reference Laboratory and presence of pre-trained, well-prepared national and district rapid response teams facilitated the containment and control of this outbreak within one month, preventing nationwide and global transmission of the disease