Science Friday

‘The Kissing Bug’ And The Story Of A Neglected Disease

January 9, 2026

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  • Chagas disease, transmitted by the 'kissing bug' insect's fecal material, affects about 8 million people, mostly in the Americas, but remains largely neglected by global health resources due to its containment within specific socioeconomic and geographic communities. 
  • The disease manifests primarily by affecting the heart or GI system, and while there is no cure for adults in the chronic stage, curative medications exist for children and those diagnosed in the acute stage. 
  • The term 'neglected tropical disease' reflects a global health agenda bias, as the disease is ignored by Western nations because it is not perceived as a threat that will spread beyond its endemic regions, leading to significant stigma and barriers to care for immigrant populations. 

Segments

Author’s Motivation for Book
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(00:01:24)
  • Key Takeaway: Daisy Hernández wrote ‘The Kissing Bug’ to fill a void for a book she wished existed for her aunt and to raise awareness among Americans and medical providers about Chagas disease.
  • Summary: The author felt compelled to write the book because no existing resource covered the story of Chagas disease in the way her family experienced it. She aimed to create a resource she and her aunt wished they had when dealing with the illness. The initial plan was to write an article, but the scope expanded into a full book to raise awareness.
Aunt Dora’s Life and Illness
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(00:02:02)
  • Key Takeaway: Aunt Dora’s Chagas disease manifested as severe, enlarging stomach pains, leading to a misinterpretation of pregnancy in the 1970s before fevers caused hallucinations and hospitalization.
  • Summary: Dora was a vibrant woman who achieved her dream of becoming a public school teacher after immigrating from Colombia. Her illness began with severe stomach pains that caused her abdomen to enlarge, leading to social embarrassment due to the time period. The condition progressed to fevers that induced hallucinations, prompting her family to seek emergency medical care.
Chagas Transmission Details
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(00:03:54)
  • Key Takeaway: Chagas disease is transmitted via the parasitic material in the fecal matter of the kissing bug, not the bite itself, often entering the body through the bite wound or being rubbed into the eyes or mouth.
  • Summary: The parasitic disease is transmitted by triatomine insects found in Central and South America, Mexico, and rarely in the US. Transmission occurs when the insect defecates near the bite site, allowing the parasite to enter the host. Initial symptoms are often vague, like flu-like headaches or fever, which can lead to delayed diagnosis before the disease enters the chronic stage.
Chronic Stage and Regional Impact
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(00:05:25)
  • Key Takeaway: In the chronic stage, Chagas disease has no cure for adults and causes cardiac problems in 10 to 15 percent of those affected, making it the number one cause of heart disease in Latin America.
  • Summary: Once Chagas enters the chronic stage in adults, treatment options are severely limited, and most people remain asymptomatic. However, for the minority who develop complications, cardiac issues are the most common outcome. Awareness in Latin American countries varies, but communities often understand the need to save money for future pacemaker costs associated with the disease.
Neglected Disease Context
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(00:10:01)
  • Key Takeaway: Chagas is classified as a neglected tropical disease because global resources are not dedicated to its treatment or diagnosis, primarily because it is contained within communities in Latin America and is not perceived as a threat to Western nations.
  • Summary: Neglect stems from the disease not typically spreading beyond the affected communities, meaning Western countries setting the global health agenda can afford to ignore it. The term ’tropical’ acts as diplomatic language masking underlying racial and economic inequities in global health prioritization. The biology of the disease, which is not easily transmissible like COVID-19, also helps contain the political urgency.
Stigma and Immigration Intersection
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(00:12:57)
  • Key Takeaway: Immigration policy directly impacts public health access for Chagas patients, as fear of deportation or ICE presence in medical settings prevents immigrants from seeking necessary care until they reach emergency situations.
  • Summary: Aunt Dora was terrified of anyone knowing she had Chagas, possibly influenced by the AIDS epidemic stigma of the 1980s. The author notes that current immigration policies create an environment where immigrants avoid seeking routine medical care due to fear of enforcement actions. This forces patients to delay treatment until their condition becomes an emergency, severely hindering public health efforts.
Treatment Status and Future Screening
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(00:15:55)
  • Key Takeaway: Curative medications exist for children and acute-stage patients, highlighting the critical need for prenatal screening in the US, as hundreds of children may be born with the disease annually without diagnosis.
  • Summary: There is currently no cure for adults in the chronic stage of Chagas disease. However, medications are highly effective for children and those in the acute phase. The lack of prenatal screening in the United States means potentially hundreds of infected children each year miss out on effective treatment.