Anthrax outbreak in Uganda: Outbreak response lessons

Uganda, a tropical country with an equator that transects in the middle, is a hotspot for several emerging and re-emerging infectious diseases. Most of the diseases are zoonotic, of which more than 60% originate from wild and domestic species.
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Strengthening anthrax outbreak response and preparedness: simulation and stakeholder education in Namisindwa district, Uganda - BMC Veterinary Research

Background Anthrax is a zoonotic disease caused by Bacillus anthracis that poses a significant threat to both human health and livestock. Effective preparedness and response to anthrax outbreak at the district level is essential to mitigate the devastating impact of the disease to humans and animals. The current diseaae surveillance in animals and humans uses two different infrastructure systems with online platform supported by established diagnostic facilities. The differences in surveillance systems affect timely outbreak response especially for zoonotic diseases like anthrax. We therefore aimed to assess the feasibility of implementing a simulation exercise for a potential anthrax outbreak in a local government setting and to raise the suspicion index of different district stakeholders for a potential anthrax outbreak in Namisindwa District, Uganda. Methods We conducted a field-based simulation exercise and a health education intervention using quantitative data collection methods. The study participants mainly members of the District Taskforce (DTF) were purposively selected given their role(s) in disease surveillance and response at the sub-national level. We combined 26 variables (all dichotomized) assessing knowledge on anthrax and knowledge on appropriate outbreak response measures into an additive composite index. We then dichotomized overall score based on the 80% blooms cutoff i.e. we considered those scoring at least 80% to have high knowledge, otherwise low. We then assessed the factors associated with knowledge using binary logistic regression with time as a proxy for the intervention effect. Odds ratios (ORs) and 95% Confidence intervals (95%CI) have been reported. Results The overall district readiness score was 35.0% (24/69) and was deficient in the following domains: coordination and resource mobilization (5/16), surveillance (5/11), laboratory capacity (3/10), case management (4/7), risk communications (4/12), and control measures (4/13). The overall community readiness score was 7 out of 32 (22.0%). We noted poor scores of readiness in all domains except for case management (2/2). The knowledge training did not have an effect on the overall readiness score, but improved specific domains such as control measures. Instead tertiary education was the only independent predictor of higher knowledge on anthrax and how to respond to it (OR = 1.57, 95% CI = 1.07–2.31). Training did not have a significant association with overall knowledge improvement but had an effect on several individual knowledge aspects. Conclusion We found that the district’s preparedness to respond to a potential anthrax outbreak was inadequate, especially in coordination and mobilisation, surveillance, case management, risk communication and control measures. The health education training intervention showed increased knowledge levels compared to the pre-test and post-test an indicator that the health education sessions could increase the index of suspicion. The low preparedness underscores the urgency to strengthen anthrax preparedness in the district and could have implications for other districts. We deduce that trainings of a similar nature conducted regularly and extensively would have better effects. This study’s insights are valuable for improving anthrax readiness and safeguarding public and animal health in similar settings.

Zoonotic diseases of livestock origin continue to receive limited attention in terms of routine surveillance, and diagnostics at the point of care in Uganda and other low and middle-income countries.  Anthrax is one such zoonotic disease that results in the sudden death of livestock and exposure of humans through contact with dead animals and their body fluids. Recently, Uganda has registered several outbreaks in different parts of the country, with an alarming number of human infections. Our study focused on assessing the preparedness of local government districts in responding to reported suspected anthrax outbreaks. Our results reveal that districts are ill-prepared in several response aspects critical to protecting both animals and humans from infections. Whereas Uganda has progressed well and developed capacities for responding to outbreaks of emerging infectious diseases especially highly pathogenic diseases like ebola, Marburg, COVID-19 etc, the same efforts are not applied to zoonotic diseases of animal origin like anthrax, Rift Valley fever among others.  The established surveillance system and associated capacity building to respond to outbreaks is strong under the Ministry of Health (MoH) compared to the counterpart  Ministry of Agriculture, Animal Industry and Fisheries (MAAIF). This creates a serious gap in outbreak response for zoonotic diseases of animal origin with associated risks to human health. One health approach well recognised to bridge this gap, remains to be fully appreciated and applied across different responsible ministries and institutions. Hence, we still need more dedicated efforts to address the gaps in outbreak preparedness and response identified in our research with a special focus on training district local government task force personnel using one health approach. 

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