[Mother and two siblings with cockroach asthma]

Area of Science:

• Allergy and Immunology
• Environmental Health

Background:

• Asthma diagnosis can be complex, sometimes misattributed to psychogenic factors due to late onset or environmental influences.
• Cockroach allergy is a known cause of asthma, but its recognition varies geographically.

Observation:

• Two siblings and their mother presented with asthma symptoms.
• A history of poor living conditions with significant cockroach infestation was noted in the family.
• High levels of cockroach-specific IgE antibodies were detected in all affected individuals.

Findings:

• Cockroach allergen was identified as the primary cause of asthma in these patients.
• The study detected specific IgE antibodies to cockroaches, confirming allergic sensitization.
• The late onset and familial history initially led to misdiagnosis.

Implications:

• This case series emphasizes the importance of considering cockroach allergy in asthma diagnosis, especially in unsanitary environments.
• Healthcare providers in Japan should be more aware of cockroaches as a potential asthma allergen.
• Environmental control measures targeting cockroach populations may be crucial for managing allergic asthma.