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10 Infectious Diseases Caused by Environmental Degradation and Climate Change

Environmental degradation and climate change have far-reaching consequences. Many of these we know, like ecological disasters, the extinction of animals, or sea levels rising. But, did you know Climate change has adverse effects on human health? There are quite a few infectious diseases that have ramped up as a result of Climate change.

1. Malaria

Source: DW News/Youtube

Environmental degradation, such as deforestation, disrupts ecosystems and creates conducive environments for mosquitos that carry the malaria parasite. Additionally, climate change alters rainfall patterns, leading to stagnant water bodies that serve as breeding grounds for mosquitos. For example, in the Amazon rainforest, deforestation has resulted in a rise in malaria cases as humans encroach upon mosquito habitats. Malaria poses a severe threat to human health, causing millions of deaths annually, particularly among children and pregnant women.

2. Dengue Fever

As global temperatures rise, the geographic range of the Aedes mosquito expands. This expansion, driven by Climate change, has enabled the transmission of dengue fever to previously unaffected regions. For instance, in parts of the United States where dengue fever was once rare, warmer temperatures now facilitate the breeding and spread of Aedes mosquitoes. Dengue fever can cause debilitating symptoms and, in severe cases, lead to organ failure or death. The Eliminate Dengue Project, also known as the World Mosquito Program, is working on research to stop the transmission of the disease.

3. Lyme Disease

Source: Vox/Youtube

Climate change plays a role in the increased incidence of Lyme disease, primarily transmitted through ticks. Warmer temperatures and altered precipitation patterns affect the behavior and reproductive capabilities of ticks, leading to their greater abundance and expanded geographic range. In regions like the northeastern United States and parts of Europe, Climate change has contributed to a surge in Lyme disease cases. If left untreated, Lyme disease can result in long-term health complications, including joint pain and neurological issues.

4. Cholera

Changes in temperature and rainfall patterns influence the quality and availability of water sources, making communities more vulnerable to waterborne diseases like cholera. Climate change-induced flooding can contaminate water supplies, facilitating the transmission of this bacterial infection. In regions such as Bangladesh, where floods have become more frequent due to Climate change, cholera outbreaks have become recurrent. Cholera causes severe diarrhea and dehydration, leading to high mortality rates if not promptly treated. Check stopcholera.org to find out more about cholera and help stop the spread of the disease.

5. Zika Virus

Source: Democracy Now!/Youtube

Climate change and environmental degradation have created favorable conditions for the spread of the Aedes mosquito, the primary vector for the Zika virus. Warmer temperatures and increased precipitation provide ideal breeding habitats for mosquitos, resulting in a higher risk of Zika virus transmission. For example, in Brazil, deforestation and urbanization have contributed to the expansion of Aedes mosquito populations, leading to a significant Zika outbreak. Zika virus infection can cause birth defects in infants born to infected mothers and has been associated with neurological complications in adults. To help stop the Zika Virus, consider donating to americares.org!

6. Leishmaniasis

Environmental changes, including deforestation and urbanization, disrupt the natural habitat of sandflies, responsible for transmitting leishmaniasis. Climate change can also impact the behavior and reproduction of sandflies, leading to an increased spread of this parasitic disease. In areas like the Mediterranean region, where deforestation and Climate change intersect, cases of leishmaniasis have surged. Leishmaniasis causes skin sores, ulcers, and, in severe cases, can affect internal organs.

7. Hantavirus

Source: Yale Center on Climate Change and Health/Youtube

Environmental degradation, such as deforestation and habitat destruction, increases the population of rodents that carry the hantavirus. Climate change exacerbates this issue, leading to the expansion of hantavirus transmission. For example, in South America, deforestation in the Amazon rainforest has disrupted rodent habitats, resulting in an increase in hantavirus cases. Hantavirus can cause severe respiratory infections and, in some cases, be fatal.

8. Rift Valley Fever

Changes in rainfall patterns and temperature associated with Climate change affect the transmission of Rift Valley Fever, primarily affecting animals but also posing a risk to humans. Environmental degradation and alterations in ecosystems contribute to the emergence and spread of this disease. In East Africa, where both Climate change and environmental degradation are significant, outbreaks of Rift Valley Fever have occurred, threatening livestock and human populations.

9. Chikungunya

Source: The Weather Network/Youtube

The Aedes mosquito, responsible for transmitting chikungunya, is sensitive to climate factors such as temperature and humidity. Climate change creates favorable conditions for the expansion of the mosquito’s range, leading to the emergence of chikungunya in new areas. For instance, in parts of Southeast Asia and the Caribbean, chikungunya outbreaks have been linked to changes in climate and increased mosquito populations. Chikungunya causes severe joint pain and can have long-term health consequences.

10. Schistosomiasis

Schistosomiasis is a parasitic disease commonly found in tropical and subtropical regions. Climate change can impact the distribution and lifecycle of the parasite that causes schistosomiasis. Changes in water temperature and hydrological cycles can affect the survival and reproduction of the parasite and its intermediate host, freshwater snails. For example, in areas like sub-Saharan Africa, where rising temperatures and altered rainfall patterns have been observed, there has been an increase in cases of schistosomiasis.

The transmission of schistosomiasis occurs when individuals come into contact with water bodies contaminated with the parasite. Activities such as swimming, bathing, or washing clothes in infected water can lead to infection. Schistosomiasis can cause chronic illness, organ damage, and even death if left untreated.

The impact of environmental degradation and climate change on human health is evident through the emergence and intensification of infectious diseases. Malaria, dengue fever, Lyme disease, cholera, Zika virus, leishmaniasis, hantavirus, Rift Valley Fever, chikungunya, and schistosomiasis are just a few examples of diseases influenced by these global challenges.

Addressing environmental degradation and mitigating Climate change are essential not only for protecting the planet but also for protecting our health. Implementing sustainable practices, conserving ecosystems, and taking proactive measures to reduce greenhouse gas emissions can help combat these diseases and protect vulnerable populations. By understanding the causes and impacts of these infectious diseases, we can work towards developing effective strategies for prevention, control, and treatment. It is crucial to prioritize environmental protection and climate action to minimize the risk of disease outbreaks and ensure a healthier future for all.