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Animal pneumocystosis: a model for man
1Laboratoire de pathologie du lapin, Institut national de la recherche agronomique, Nouzilly, France. cere@tours.inra.fr
Veterinary Research
|March 19, 1999
Summary
The rabbit model offers a valuable tool for studying Pneumocystis pneumonia (PCP) in immunocompetent animals. This model aids in understanding PCP pathogenesis, immune responses, and parasite transmission dynamics.
Area of Science:
- Medical Microbiology
- Immunology
- Comparative Pathology
Background:
- Pneumocystis carinii pneumonia (PCP) is a significant cause of illness and death, particularly in AIDS patients.
- PCP also affects individuals undergoing immunosuppressive therapy for organ transplantation and those with hematologic malignancies.
- Current in vitro culture limitations necessitate reliable in vivo models for studying PCP.
Purpose of the Study:
- To evaluate the rabbit as a suitable animal model for Pneumocystis carinii infection.
- To investigate the utility of the rabbit model for studying PCP pathogenesis, immunology, and epidemiology.
- To explore pulmonary surfactant modifications during P. carinii infection in rabbits.
Main Methods:
- Utilized rabbits as a susceptible host for P. carinii infection, noting their lack of need for glucocorticoid treatment.
- Compared rabbit-derived Pneumocystis strains to those from mice and rats based on antigenic and genomic data.
- Observed rapid P. carinii transmission via contact between infected and Pneumocystis-free rabbits.
Main Results:
- The rabbit model demonstrated susceptibility to P. carinii infection without immunosuppression.
- Rabbit-derived Pneumocystis strains showed closer genetic and antigenic similarity to human strains compared to rodent strains.
- The model facilitated the study of pulmonary surfactant alterations due to P. carinii infection.
- Rapid transmission of P. carinii was observed in a contact-transmission model.
Conclusions:
- The rabbit model is a valuable tool for studying PCP pathogenesis and immune responses in immunocompetent hosts.
- This model is suitable for comparative medicine, epidemiology, and immunological research related to PCP.
- Pneumocystis-free rabbits can be used to investigate parasite transmission, sources, and reservoirs.
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