Few cases of asthma caused by the two-spotted spider mite (TSM) have been reported among nonfarmer apple-packing workers. This study investigated whether allergic sensitization due to the TSM occurs in workers at the Agricultural Products Processing Center. The polymerase chain reaction was used to analyze apples and leaves provided to the Agricultural Products Processing Center for the presence of TSM. Skin prick tests using TSM antigen were administered to 10 workers, and serum levels of total immunoglobulin E (IgE) and specific IgE for TSM antigens were quantified. Of the 10 workers, four tested positive for TSM in the skin prick test, three had elevated total IgE levels, and one had also elevated specific IgE levels to TSM. This confirms that apple-packing workers risk allergic sensitization due to TSM exposure. Preventive measures are recommended not only for apple farmers but also for nonfarmer apple-packing workers.

Objective: This study aimed to investigate the validity and reliability of the Korean version of the Brief Irritability Test (BITe) and adapt it for Korean patients with psychiatric disorders. Methods: A total of 296 patients at the Department of Psychiatry of Hanyang University Guri Hospital completed the BITe, Korean Beck Depression Inventory-II, Korean Beck Anxiety Inventory, the Korean version of the State-Trait Anger Expression Inventory, and Barratt Impulsiveness Scale-11. Construct validity was confirmed through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). Reliability testing included assessments of internal consistency (Cronbach’s α) and item-total correlations. Convergent validity was examined through correlational analyses with variables such as anxiety, depression, anger, and impulsivity. Results: First, the scale had good internal consistency with a Cronbach’s α of 0.88. Second, EFA indicated a single dimensionality of the BITe, and CFA demonstrated a reasonable fit for the single-factor model (comparative fit index=0.97, Tucker-Lewis Index=0.95, normed fit index=0.97, goodness-of-fit index=0.96, root mean square error of approximation=0.12, standardized root mean residual=0.03). Finally, the convergent validity analysis revealed a significant positive correlation with depression, anxiety, and anger, except for anger control, which is a sub-variable of anger. Conclusion The results showed that the Korean version of the BITe had good psychometric properties, and might serve as a valuable tool for assessing irritability in Korean patients with psychiatric disorders.