Can Spiders Cause Allergies?

Spiders, which are classified as Class Arachnida, pose multiple health risks for humans. These include bites that can cause allergic reactions.

Although spiders are mostly harmless, there are instances of severe allergic reaction. They can cause anaphylactic shock, which is a life-threatening condition. To prevent such a reaction, people should carry epinephrine.

A 55-year-old male developed generalised urticarial rash following contact with a huntsman spider. He recovered from treatment within six hours. However, he had developed hypotension and bradycardia. This may suggest an increased risk of anaphylactic shock.

Occupational exposure to spider mites can lead to respiratory allergies. People working on farms or in agricultural fields are at risk. Therefore, additional cross-sectional studies should be conducted to assess patient characteristics and spider mite sensitization.

Several studies have reported prevalence estimates for sensitivity to spider mites. However, these prevalence estimates are not well-defined. Despite the lack of a clear consensus, spider mites are considered an important allergen. In a recent study, researchers estimated the global prevalence of spider mite allergies.

The results showed that the sensitivity to spider mites varies depending on the geographic location, population, and age of the patients. Moreover, some studies did not find a correlation between spider mite reactivity and symptoms. Several studies also reported rates of mono-sensitization.

Overall, the estimated prevalence of sensitivity to spider mites was 22.9% (95% CI 19-26.8%). Among the studies, nine reports the prevalence of sensitivity to Panonychus citri, while only one report the prevalence of sensitivity to Panonychus ulmi.