Answers are grounded in this paper and cite their sources.
We investigated associations of species of the Bacteroides fragilis group with Japanese cedar pollinosis (JCPsis). Cell numbers of Bacteroides fragilis and Bacteroides intestinalis were significantly higher in JCPsis subjects than in non-JCPsis subjects before the pollen season. They correlated positively with both symptom scores and JCPsis-specific immunoglobulin E levels.
No takes yet. Share an insight, caveat, or question.
Odamaki et al. (2008) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: