infection may influence prevalence and disease course in myelin oligodendrocyte glycoprotein antibody associated disorder (MOGAD) similar to MS but not AQP4-IgG associated NMOSD.

Background: ( persists after colonizing the gut in childhood, and potentially regulates host immune system through this process. Earlier studies have shown that infection in childhood, may protect against MS in later life. Such an association was not seen with AQP4-IgG positive NMOSD, while the association with MOGAD is unclear.

Environmental factors related to multiple sclerosis in Indian population.

Background: Multiple sclerosis (MS) is less prevalent among Indians when compared to white populations. Genetic susceptibility remaining the same it is possible that environmental associations may have a role in determining disease prevalence.

Aims: To determine whether childhood infections, vaccination status, past infection with Helicobacter pylori (H.

Association of Epstein-Barr virus infection with multiple sclerosis in India.

Objectives: Epstein-Barr virus (EBV) seroprevalence is high from early childhood in Indian populations, though multiple sclerosis (MS) is uncommon. The present study aims to evaluate the association of EBV infection with MS in Indian patients.

Method: In this study 140 MS patients and equal number of matched controls were included.