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Table 1 Different probiotic strains that were evaluated in patients with allergic rhinitis.

From: House dust mite-related respiratory allergies and probiotics: a narrative review

Probiotic agent Study population N Type of allergic rhinitis/allergen Primary end point Statistical significance References
L. acidophilus and B. lactis Children 47 Birch pollen Symptoms score p = 0.078 [41]
E. coli strain Nissle 1917 Adults 34 Grass pollen Symptoms score p = 0.257 [42]
L. johnsonii EM Children 63 Perennial rhinitis Symptoms score p = 0.09 [43]
B. longum BB536 Adults 40 Japanese cedar pollen Ocular symptoms score p = 0.04 [44]
L. paracasei (LP-33) Children 80 Perennial Quality of life p = 0.037 [45]
L. paracasei Children 90 House dust mites Quality of life p < 0.0001 [27]
L. paracasei KW3110 Adults 126 Japanese cedar pollen Symptoms score p < 0.05 [46]
L. paracasei ST-11 Adults 31 Grass pollen Nasal provocation test Ns [47]
L. paracasei NCC2461 Adults 28 Grass pollen Nasal congestion Ns [48]
L. paracasei 33 Adults 425 Grass pollen Rhinitis quality of life (RQLQ score) p = 0.0255 [49]