The growing number of cases of Hepatitis-B infection at Pramadom, Mallasserry, Thengumkavu and surrounding villages, near here, is causing concern for the district administration and the Health Department.

L. Anithakumari, Deputy District Medical Officer for Communicable Disease Control, told The Hindu here on Monday that nine cases had been confirmed through ELISA (enzyme-linked immunosorbent assay) test in the past three months. Thirty more cases tested positive in the antigen card test.