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[Approaches to selecting a strain of hantavirus for developing an inactivated brain vaccine]
Abstract:
Four strains isolated from patients with hemorrhagic fever with the renal syndrome and from field mice, natural hosts of Hantavirus, were examined in order to choose a functionally active strain fit for the development of inactivated Hantavirus brain vaccine. Virulent strain PM-10508/89 isolated from mouse lungs was chosen. The strain was highly virulent for newborn mice and rats: 100% of infected mice aged up to 24 h and 75% of rats developed an acute lethal infection upon challenge. The incubation period of Hantavirus adapted to mouse brain was decreased from 19 to 7 days. The infective titer of the virus in brain suspension was 0.1 to 6.5 lg LD50/ml. The strain was highly immunogenic and possessed a high hemagglutinating activity.
Insights
Researchers selected a virulent Hantavirus strain (PM-10508/89) from mice for developing an inactivated Hantavirus brain vaccine. This strain demonstrated high virulence and immunogenicity in animal models.
Area of Science:
- Virology
- Immunology
- Vaccine Development
Context:
- Hemorrhagic fever with the renal syndrome (HFRS) is a significant public health concern.
- Hantavirus is the causative agent of HFRS and is carried by rodents, posing a zoonotic risk.
- Development of an effective Hantavirus vaccine is crucial for disease prevention.
Purpose:
- To identify and characterize a suitable Hantavirus strain for the development of an inactivated Hantavirus brain vaccine.
- To evaluate the virulence, infectivity, and immunogenic properties of Hantavirus strains isolated from patients and field mice.
Summary:
- Four Hantavirus strains were assessed for vaccine development potential.
- Virulent strain PM-10508/89, isolated from mouse lungs, was selected due to its high virulence in newborn mice and rats.
- The selected strain exhibited a shortened incubation period after adaptation to mouse brain, high infective titers, and strong immunogenic and hemagglutinating activity.
Impact:
- The selection of a functionally active Hantavirus strain is a critical step towards creating a safe and effective inactivated Hantavirus brain vaccine.
- This research contributes to the ongoing efforts to combat Hantavirus infections and HFRS.
- The characterized strain provides a valuable resource for further vaccine research and development.