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Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits (Oryctolagus cuniculus)
Published on: July 31, 2021
ENHANCED PASSIVE IMMUNITY TO STREPTOCOCCUS INFECTION IN RABBITS
1Department of Bacteriology, College of Physicians and Surgeons, Columbia University, New York.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Antibacterial serums often fail due to a lack of recipient cell mobilization, not insufficient antibodies. Adding immune cells to serum significantly enhances passive immunity and protection against infection.
Area of Science:
- Immunology
- Infectious Diseases
Background:
- Antibacterial serums frequently fail to treat active infections when passively transferred.
- This failure is hypothesized to stem from poor cell preparation or mobilization in the recipient, rather than antibody deficiency.
Purpose of the Study:
- To investigate the role of cell preparation and mobilization in passive immunity against bacterial infections.
- To determine if enhancing cell presence in recipients improves the efficacy of antibacterial serums.
Main Methods:
- Experimental streptococcus empyema was induced in rabbits.
- Pleural fluid containing mononuclear cells from protected animals was transferred.
- Serum from immunized rabbits and pleural exudates (acute and subacute) were tested for protective effects.
- Normal exudate cells were combined with antiserum to assess combined protection.
Main Results:
- Serum from immunized rabbits showed minimal protective effect.
- Pleural exudate cells from actively immunized animals provided significant passive protection.
- Normal exudate cells combined with antiserum yielded a high degree of protection.
Conclusions:
- Cellular components, not just antibodies, are crucial for effective passive immunity.
- The addition of immune cells to antiserum enhances protection against streptococcus empyema.
- Further research is needed to elucidate the mechanisms of cell-mediated passive immunity and its therapeutic potential.
