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Cynomolgus monkey model for experimental Q fever infection
Abstract:
A subhuman primate model was developed for study of the pathogenesis of infection with Coxiella burnetii. Cynomolgus monkeys (Macaca fascicularis) that were exposed to 10(5) mouse median infectious intraperitoneal doses of C. burnetii in a small-particle aerosol developed clinical signs of illness and pathologic changes characteristic of Q fever infection in humans. All monkeys had radiologic evidence of pneumonia by day 9. Antibodies to C. burnetii were detectable by the indirect fluorescent antibody test by day 7. These data indicate that the cynomolgus monkey is a suitable model for study of the pathogenesis of Q fever infection and may prove valuable in the evaluation of C. burnetii vaccines.
Insights
A new primate model using cynomolgus monkeys effectively mimics human Q fever infection. This Coxiella burnetii model shows promise for studying disease pathogenesis and evaluating new vaccines.
Area of Science:
- Veterinary Medicine
- Infectious Diseases
- Primate Models
Background:
- Coxiella burnetii causes Q fever, a zoonotic disease with significant human health implications.
- Existing animal models may not fully replicate human Q fever pathogenesis.
- A robust animal model is crucial for understanding disease mechanisms and developing effective countermeasures.
Purpose of the Study:
- To develop and validate a subhuman primate model for studying Coxiella burnetii infection.
- To assess the clinical and pathological outcomes of aerosolized C. burnetii exposure in cynomolgus monkeys.
- To evaluate the suitability of this model for Q fever pathogenesis research and vaccine efficacy testing.
Main Methods:
- Cynomolgus monkeys (Macaca fascicularis) were exposed to a standardized aerosolized dose of C. burnetii.
- Clinical signs, pathological changes, and serological responses were monitored over time.
- Radiographic imaging was used to assess pulmonary involvement.
Main Results:
- Monkeys developed clinical signs and pathological changes consistent with human Q fever.
- Radiographic evidence of pneumonia was observed in all exposed monkeys by day 9.
- Antibodies to C. burnetii became detectable via indirect fluorescent antibody testing by day 7.
Conclusions:
- The cynomolgus monkey is a suitable and valuable model for investigating Q fever pathogenesis.
- This primate model can be utilized for the evaluation of Coxiella burnetii vaccines.
- Further research using this model will advance our understanding and control of Q fever.
