Genotypic Profiling and Clinical Impact of Helicobacter pylori Virulence Genes ( GLM , HPU , V acA , C agA , and I ceA ) in Gastroduodenal Diseases among Libyan Patients

Abstract

Helicobacter pylori infection represents a widespread chronic condition with varying prevalence influenced by race, ethnicity, and geography. The severity of H. pylori -associated diseases is determined by an array of virulence factors. Although extensive studies have been conducted globally, data on the distribution of Helicobacter pylori virulence genes in Libya remain limited, constraining insights into the pathogenicity of local strains and hindering the development of targeted interventions. This study aimed to evaluate the prevalence of H. pylori infection, characterize essential virulence genes [ v acA variants (s1/s2, m1/m2), c agA , and i ceA 1], and examine their association with gastroduodenal diseases among Libyan patients. Gastric biopsies from 144 participants were analyzed using polymerase chain reaction (PCR) assays, and risk factor data were collected via questionnaires. H. pylori was detected in 63.2% of samples by PCR. The v acA gene was present in 84.6% of cases, c agA in 58.2%, and i ceA 1 in 29.7%. Among v acA variants, s1 allele was most common (53.2%), followed by m1 (42.9%), m2 (37.7%), and s2 (13%) alleles. Significant associations were identified between specific virulence genes and the development of gastroduodenal diseases, highlighting their role in pathogenicity. This investigation is one of Libya’s first comprehensive assessments of H. pylori virulence factors, addressing a critical epidemiological gap. The high prevalence of virulence genes suggests their potential as disease biomarkers. These findings contribute to a deeper understanding of H. pylori pathogenicity within the Libyan population and establish a basis for future clinical interventions and public health strategies to manage and prevent H. pylori -associated diseases in Libya and comparable regions.