Viral Pathogenesis and Immunology of Measles and Canine Distemper

Measles virus and canine distemper virus (CDV) are closely related members of the Morbillivirus genus that exploit similar strategies to breach host defences and propagate within lymphoid and epithelial compartments. Both viruses initiate infection at mucosal surfaces, engaging high‐affinity receptors on immune cells—signalling lymphocyte activation molecule (SLAM) on lymphocytes and macrophages, and nectin‐4 on epithelial barriers—to establish a systemic infection. Following receptor‐mediated entry, a primary viraemia seeds lymphoid organs, leading to extensive infection of memory T cells and follicular B cells. In measles this generates transient depletion of pre‐existing immune memory, or immunological amnesia, followed by robust, virus‐specific lymphocyte expansion. CDV likewise induces lymphopenia, with subsequent immunosuppression and susceptibility to secondary infections, and in some hosts culminates in neuroinvasion and demyelinating disease. The innate response, including type I interferons and natural killer cells, is subverted by viral proteins that antagonise signalling pathways, while adaptive immunity is shaped by the kinetics of antibody generation and T-cell responses. Vaccine‐induced protection hinges on the durability of neutralising antibodies and memory T-cells, yet waning immunity and gaps in coverage underlie periodic resurgences of measles, and the absence of widespread vaccination in wildlife permits CDV to persist in multiple reservoir species, posing conservation and spillover threats.

Research from Nature Portfolio

Recent investigations into long‐term antibody kinetics following routine measles vaccination in large birth cohorts indicate that maternally derived antibodies wane within months, and that antibody concentrations after standard two‐dose schedules may decline below protective thresholds in adolescence. Modelling of seroreversion rates supports the strategic use of additional catch-up doses to sustain population immunity and forestall outbreaks in near-elimination settings. In the context of conservation virology, detailed genomic and receptor‐binding analyses of a fatal CDV outbreak in captive giant pandas have demonstrated adaptive substitutions in the haemagglutinin protein at the SLAM‐binding interface, underscoring the risk of host-switching events and the necessity of targeted vaccination and surveillance programmes in vulnerable wildlife populations.

Viral Pathogenesis and Immunology of Measles and Canine Distemper publication trend

The graph below shows the total number of articles in viral pathogenesis and immunology of measles and canine distemper across all publications each year (not limited to Nature Index journals).

Technical terms

Viraemia: Presence of infectious virus particles in the bloodstream facilitating systemic dissemination.

Immunological amnesia: Loss of pre-existing immune memory following depletion of memory lymphocytes by infection.

SLAM: Signalling lymphocyte activation molecule, a high-affinity receptor for morbilliviruses on lymphoid cells.

Nectin-4: An epithelial adherens junction protein serving as a receptor for virus entry and exit in respiratory and urinary tracts.

Haemagglutinin (H) protein: Viral surface glycoprotein mediating attachment to host cell receptors and determining cell tropism.

Seroreversion: Decline of antibody titres below protective levels following initial seroconversion.

Tropism: The predilection of a virus for specific cell types or tissues based on receptor expression and intracellular environment.

References

1. Long-term waning of vaccine-induced immunity to measles in England: a mathematical modelling study. The Lancet Public Health (2024).
2. Long-term measles antibody profiles following different vaccine schedules in China, a longitudinal study. Nature Communications (2023).
3. Diversity of susceptible hosts in canine distemper virus infection: a systematic review and data synthesis. BMC Veterinary Research (2016).
4. Tumor Cell Marker PVRL4 (Nectin 4) Is an Epithelial Cell Receptor for Measles Virus. PLOS Pathogens (2011).
5. Measles Immune Suppression: Lessons from the Macaque Model. PLOS Pathogens (2012).
6. Tropism and molecular pathogenesis of canine distemper virus. Virology Journal (2019).
7. Predominant Infection of CD150+ Lymphocytes and Dendritic Cells during Measles Virus Infection of Macaques. PLOS Pathogens (2007).
8. Early Target Cells of Measles Virus after Aerosol Infection of Non-Human Primates. PLOS Pathogens (2011).
9. Fatal canine distemper virus infection of giant pandas in China. Scientific Reports (2016).
10. Evolution and Interspecies Transmission of Canine Distemper Virus—An Outlook of the Diverse Evolutionary Landscapes of a Multi-Host Virus. Viruses (2019).