Eosinophilic airway inflammation in a cynomolgus monkey

Area of Science:

• Veterinary Pathology
• Nonhuman Primate Research
• Allergic Airway Diseases

Background:

• Toxicology studies often use nonhuman primates as models for human diseases.
• Naturally occurring allergic airway conditions are infrequently reported in nonhuman primates.
• Understanding spontaneous conditions aids in interpreting toxicology study results.

Observation:

• A 4-year-old female cynomolgus monkey in a control group exhibited respiratory symptoms.
• Histopathological examination revealed significant eosinophilic infiltration throughout the airways.
• Associated inflammatory cells included mast cells, lymphocytes, and plasmacytes.

Findings:

• The observed airway lesion presented as eosinophilic airway inflammation.
• The pattern and cellular infiltrate are morphologically consistent with allergic airway disorders.
• This represents a rare instance of spontaneous allergic airway disease in a nonhuman primate.

Implications:

• This case provides a valuable reference for spontaneous allergic airway inflammation in cynomolgus monkeys.
• Findings may inform the interpretation of respiratory findings in nonhuman primate toxicology studies.
• Further research into nonhuman primate models of asthma is warranted.