This kit for detecting infectious diseases such as salmonella is easier to operate and safer compared to test kits currently in use. It is also suitable for self-testing at home, often needed in areas without good access to medical care so that users can seek medical care promptly and contain the spread of disease. One end of the kit contains the two detection reagents; the middle is the reaction zone; and the other end is the blood collection device. After taken blood, the device's pistons move the blood into contact with the reagent, and a color indicator signals the presence of any disease.