Passive transfer of immunity against Cryptosporidium infection in neonatal mice using monoclonal antibodies

Area of Science:

• Parasitology
• Immunology
• Infectious Diseases

Background:

• Cryptosporidium parvum is a protozoan parasite causing significant diarrheal disease.
• Effective treatments for cryptosporidiosis remain limited, necessitating novel therapeutic strategies.

Purpose of the Study:

• To evaluate the efficacy of orally administered monoclonal antibodies (mAbs) against Cryptosporidium parvum.
• To determine if passive antibody transfer can modulate C. parvum infections in a neonatal mouse model.

Main Methods:

• Neonatal mice were inoculated with C. parvum oocysts and treated daily with oral mAb mixtures or a specific mAb (Cmg-3).
• Parasite loads were assessed at 4 and 8 days post-infection (pi).
• Statistical analysis was performed to compare infection rates between treatment and control groups (p < 0.05).

Main Results:

• Oral mAb treatment significantly reduced C. parvum parasite loads at both 4 and 8 days pi compared to controls.
• Treatment with a mixture of mAbs demonstrated a more consistent reduction in parasite load than mAb Cmg-3 alone.
• mAb Cmg-3 alone showed significant reduction only at 4 days pi.

Conclusions:

• Passive transfer of orally administered monoclonal antibodies can effectively reduce Cryptosporidium parvum parasite loads.
• mAb therapy represents a potential therapeutic approach for controlling cryptosporidial infections.