Which of the following is NOT a typical sign of Sialodacryoadenitis?

• A. Chromodacryorrhea (red eye)
• B. Swelling of cervical lymph nodes
• C. Sensitivity to light
• D. Hair loss around the tail

Answer: (D)

Sialodacryoadenitis primarily involves inflammation of the salivary and lacrimal glands in rats, so the hallmark signs are gland swelling and ocular irritation. You’ll commonly see swollen salivary/lacrimal regions, the eye appearing red or stained from porphyrin secretions (chromodacryorrhea), and sensitivity to light due to ocular inflammation. Swollen cervical lymph nodes can accompany the infection as part of the regional inflammatory response. Hair loss around the tail does not fit this inflammatory pattern and is not a typical sign of this disease; when seen, it’s more often due to other factors like barbering, mites, or stress-related alopecia, not glandular or ocular involvement.