The objective of the study is to investigate prevalence of H.Pylori infection among acne vulgaris patients.

The study included patients with acne vulgaris and healthy control participants. The study recruited both sexes, all grades of acne, adolescents and young adults.

All patients were subjected to complete history, general and skin examination Acne vlugaris Patients were classified into mild, moderate and severe according to the classification of American Academy of dermatology for acne vulgaris.

Detection of H. pylori infection:

Blood and stool samples were taken from each participant and was directly transferred to laboratory for detection of H. Pylori antigen and antibody.

An enzyme-linked immune sorbent assay (ELISA) was used for quantitative assessment of IgG antibodies against H.Pylori in human serum.

A monoclonal antibodies based enzyme-linked immunosorbent assay was used to detect H.Pylori specific antigen in stool samples.

Inclusion Criteria:

• Acne vulgaris patients
• Healthy volunteers (control)

Exclusion Criteria:

• Patients with a history of drug intake that affects H. Pylori such as proton-pump inhibitors, clarithromycin, tetracyclines, amoxicillin or metronidazole within previous two weeks were excluded.

Patients with acne vulgaris and presented to Dermatology outpatient clinic, Sohag University hospital.

Healthy volunteers.

All available data shall be shared with other researchers upon their request after agreement of study director