Learning from Brazil's dengue outbreak for Mumbai’s monsoon preparedness: a public health perspective
DOI:
https://doi.org/10.18203/2394-6040.ijcmph20261059Keywords:
Brazil, Dengue, El Nino, Monsoon, MumbaiAbstract
The expansion of dengue fever is a growing concern globally, with over half a million cases and more than 100 deaths reported worldwide as of January 2024. Dengue is now present in 85% of Brazil's municipalities, spreading into regions where it was never seen before. The aim and objective of the study is to look into the dengue outbreak in Brazil searching for contributing factors and to compare the presence of similar factors in Mumbai region. The study involves comprehensive review of existing literature about Brazil outbreak in online. Attempting to search for articles based on relevance to dengue fever cases and its management in Brazil and potential implication for Mumbai. Conclusion were drawn from expert opinion. The expansion of dengue fever is a growing concern globally, with over half a million cases and more than 100 deaths reported worldwide as of January 2024. Dengue is now present in 85% of Brazil's municipalities, spreading into regions where it was never seen before. The aim and objective of the study is to look into the dengue outbreak in Brazil searching for contributing factors and to compare the presence of similar factors in Mumbai region. The study involves comprehensive review of existing literature about Brazil outbreak in online. Attempting to search for articles based on relevance to dengue fever cases and its management in Brazil and potential implication for Mumbai. Conclusion were drawn from expert opinion. Brazil's situation is dire, with over 1 million cases reported early this year 2024 and projections suggesting up to 4.2 million cases by year's end. But, between January to April 2024, 5.9 million of dengue cases reported. Due to the onset of El Nino and also due to extreme weather, untimely rainfall, flooding, stagnant water pools which leads to thriving of mosquito and prolongation of active transmission period. Steps were taken to reduce the Dengue outbreak. By prediction as per El Nino cyclicity, there will be no surge of dengue cases in Mumbai. But, in sprit of staying prepare and not to caught unaware, Mumbai is making precaution for dealing with dengue outbreak.with over 1 million cases reported early this year 2024 and projections suggesting up to 4.2 million cases by year's end. But, between January to April 2024, 5.9 million of dengue cases reported. Due to the onset of El Nino and also due to extreme weather, untimely rainfall, flooding, stagnant water pools which leads to thriving of mosquito and prolongation of active transmission period. Steps were taken to reduce the Dengue outbreak. By prediction as per El Nino cyclicity, there will be no surge of dengue cases in Mumbai. But, in sprit of staying prepare and not to caught unaware, Mumbai is making precaution for dealing with dengue outbreak.
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References
WHO. Dengue and severe dengue. World Health Organization. 2024. Available at: https://www.who. int/news-room/fact-sheets/detail/dengue-and-severe-dengue. Report. Accessed on 13 February 2026.
World Health Organization. Dengue-Global Situation. www.who.int. 2023. Available at: https://www.who.int/emergencies/disease-outbreak-news/item/2023-DON498. Report. Accessed on 13 February 2026.
Dengue Multi-Country Grade 3 Outbreak 2024 - PAHO/WHO | Pan American Health Organization. www.paho.org. 2024. Available at: https://www. paho.org/en/topics/dengue/dengue-multi-country-grade-3-outbreak#:~:text=Between%20epidemio logical%20weeks%20(EW)%201. Report. Accessed on 13 February 2026.
Brazil rushes out dengue vaccine amid country’s biggest-ever outbreak. Gavi, the Vaccine Alliance. www.gavi.org. Available at: https://www.gavi.org/ vaccineswork/brazil-rushes-out-dengue-vaccine-amid-countrys-biggest-ever-outbreak. Report. Accessed on 13 February 2026.
An Escalation of Dengue in Brazil. Medscape. Available at: https://www.medscape.com/ viewarticle/escalation-dengue-brazil-echoes-global-crisis-2024a10006js?form=fpf. Report. Accessed on 13 February 2026.
Dengue/Dhf Situation In India. National Center for Vector Borne Diseases Control (NCVBDC). ncvbdc.mohfw.gov.in. Available at: https://ncvbdc. mohfw.gov.in/index4.php?lang=1&level=0&linkid=431&lid=3715. Report. Accessed on 13 February 2026.
Pol SS, Rajderkar SS, Dhabekar PD, Bansode Gokhe SS. Effect of climatic factors like rainfall, humidity and temperature on the dengue cases in the metropolitan city of Maharashtra. Int J Commun Med Publ Health. 2021;8(2):672. DOI: https://doi.org/10.18203/2394-6040.ijcmph20210220
National Geographic kids. Brazil Country Profile-National Geographic Kids. Geography. 2014. Available at: https://kids.nationalgeographic.com/ geography/countries/article/brazil#:~:text=The%20Brazilian%20landscape%20is%20very. Report. Accessed on 13 February 2026.
Abreu CT. Brazilian Coastal and Marine Protected Areas Importance, Current Status and Recommendations. Division For Ocean Affairs And the law of the sea office of legal affairs the United Nations New York. 2015. Available at: https://www.un.org/oceancapacity/sites/www.un.org.oceancapacity/files/thesis_carina_abreu_31_12_pdf_1.pdf. Report. Accessed on 13 February 2026.
Martins L. Brazil History, Map, Culture, Population, and Facts. In: Encyclopædia Britannica. 2019. Available at: https://www.britannica.com/place/ Brazil. Report. Accessed on 13 February 2026.
Favela WJ. Brazilian shantytown. In: Encyclopædia Britannica. 2016. Available at: https://www. britannica.com/topic/favela. Report. Accessed on 13 February 2026.
Charlesworth SM, Kligerman DC, Blackett M, Warwick F. The Potential to Address Disease Vectors in Favelas in Brazil Using Sustainable Drainage Systems: Zika, Drainage and Greywater Management. Int J Environm Res Publ Health. 2022;19(5):2860. DOI: https://doi.org/10.3390/ijerph19052860
Gamesby R. Mumbai case study. Coolgeography.co.uk. 2012. Available at: https://www.coolgeography.co.uk/A-level/AQA/ Year%2013/World%20Cities/Mumbai/Mumbai.htm. Report. Accessed on 13 February 2026.
Mundu G, Bhagat RB. Slum conditions in Mumbai with reference to the access of civic amenities. Research gate. 2008. Available at: https://www.researchgate.net/publication/290163244_Slum_conditions_in_Mumbai_with_reference_to_the_access_of_civic_amenities. Accessed on 13 February 2026.
Zara ALDSA, Santos SMD, Fernandes-Oliveira ES, Carvalho RG, Coelho GE. Estratégias de controle do Aedes aegypti: Uma revisão. Epidemiol Serviços Saúde. 2016;25(2):391-404. DOI: https://doi.org/10.5123/S1679-49742016000200017
Girard M, Nelson CB, Picot V, Gubler DJ. Arboviruses: A global public health threat. Vaccine. 2020;38(24):3989-94. DOI: https://doi.org/10.1016/j.vaccine.2020.04.011
Lowe R, Lee S, Lana RM, Codeço CT, Castro MC, Pascual M. Emerging arboviruses in the urbanized Amazon rainforest. BMJ. 2020;371:m4385. DOI: https://doi.org/10.1136/bmj.m4385
Vasconcelos PFC. Yellow Fever. Rev Soc Bras Med Trop. 2003;36(2):275-93. DOI: https://doi.org/10.1590/S0037-86822003000200012
de Araujo-Oliveira A, Gil-Santana HR, Teixeira CSB, dos Santos-Mallet JR, Alencar J. Evaluation of the Diversity of Culicidae Vectors of the Sylvatic Yellow Fever Virus in Atlantic Forest Remnants with the Use of Ovitraps and Bamboo Traps. Vector Borne Zoonotic Dis. 2021;21(11):875-83. DOI: https://doi.org/10.1089/vbz.2021.0033
Machado NG, Neto NL, Barbosa J, Fabrício O, Marcelo SB. Spatiotemporal Dengue Fever Incidence Associated with Climate in a Brazilian Tropical Region. Geographies. 2023;3(4):673-86. DOI: https://doi.org/10.3390/geographies3040035
Thai KT, Anders KL. The role of climate variability and change in the transmission dynamics and geographic distribution of dengue. Exp Biol Med. 2011;236(8):944-54. DOI: https://doi.org/10.1258/ebm.2011.010402
Muturi EJ, Blackshear M, Montgomery A. Temperature and density-dependent effects of larval environment on Aedes aegypti competence for an alphavirus. J Vector Ecol. 2012;37(1):154-61. DOI: https://doi.org/10.1111/j.1948-7134.2012.00212.x
Barua A, Yeolekar ME. Trends Of Dengue Infection A 3 Year Observation Study From Mumbai. Int J Infect Dis. 2018;73:182. DOI: https://doi.org/10.1016/j.ijid.2018.04.3825
Bellinato DF, Viana-Medeiros PF, Araújo SC, Martins AJ, Lima JBP, Valle D. Resistance Status to the Insecticides Temephos, Deltamethrin, and Diflubenzuron in Brazilian Aedes aegypti Populations. BioMed Res Int. 2016;2016:1-12. DOI: https://doi.org/10.1155/2016/8603263
Urbanacres dev. BMC Adopts Trace and Treat” Strategy to Combat Dengue, Malaria. Urban Acres. 2024. Available at: https://urbanacres.in/bmc-adopts-trace-and-treat-strategy-to-combat-dengue-malaria/. Report. Accessed on 13 February 2026.
MIT Technology Review. Brazil is fighting dengue with bacteria-infected mosquitos. Available at: https://www.technologyreview.com/2024/03/15/1089845/brazil-dengue-wolbachia-mosquitos/. Accessed on 13 February 2026.
Alphey L, Benedict M, Bellini R, Clark GG, Dame DA, Service MW, et al. Sterile-Insect Methods for Control of Mosquito-Borne Diseases: An Analysis. Vector Borne Zoonotic Dis. 2010;10(3):295-311. DOI: https://doi.org/10.1089/vbz.2009.0014