CagA-Positive Helicobacter pylori Infection and Reduced Sperm Motility, Vitality, and Normal Morphology

Table 1

Medians (minimum–maximum) of pH, volume, sperm concentration, percentages of motility, normal morphology, and vitality in patients infected by HP strains expressing CagA and in patients infected by CagA-negative HP strains.

HP patients	pH	Volume (mL)	Sperm/mL×10^6	Progressive sperm motility %	Normal forms %	^$Vitality %
CagA positive; 𝑛=37	7.3; (7.2–7.6)	3; (1–8)	58; (1–287.50)	18**; (2–30)	18*; (7–34)	35**; (10–59)
CagA negative; 𝑛=50	7.3; (7.2–7.6)	3; (1–7)	63; (1–232)	32; (15–64)	22; (8–36)	48; (32–65)

^∗∗𝑃<0.01; *𝑃<0.05; ^$sperm vitality was calculated in samples with progressive sperm motility <40%; number of CagA positive: 37; number of CagA negative: 41.