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| Maine CDC Home | Contact Us | Haemophilius Influenzae Disease |
Disease-Specific Information > Haemophilius Influenzae Disease Haemophilius Influenzae DiseaseHaemophilius influenzae are Gram--negative coccibacilli that are divided into unencapsulated (nontypable) and encapsulated strains. The encapsulated strains are further classified into serotypes a through f, based on the antigenic characteristic of their polysaccharide capsules. H. influenzae serotype b (Hib) is the most pathogenic. Since 1990, routine use of the Hib conjugate vaccine has decreased the incidence of invasive Hib disease in children. Maine monitors the incidence of invasive H. influenzae through mandatory reporting by health care providers, clinical laboratories and other public health partners.
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