PMID- 8980621 OWN - NLM STAT- MEDLINE DCOM- 19970113 LR - 20101118 IS - 0903-4641 (Print) IS - 0903-4641 (Linking) VI - 104 IP - 10 DP - 1996 Oct TI - Local and systemic antibody levels against protein D of Haemophilus influenzae following immunization and infection in rats. PG - 709-17 AB - Outer membrane proteins of Haemophilus influenzae are considered as possible vaccine candidates against non-typable H. influenzae (NTHi), a major cause of respiratory infections. Here, we study local and systemic antibody responses to protein D, a well-conserved 42-kDa membrane protein, following local and systemic immunization, and experimental acute otitis media (AOM) with NTHi and H. influenzae type b (Hib) in rats. Animals that were challenged and rechallenged in the middle ear with Hib strain Minn A or NTHi strain 1161 developed IgG and IgA antibodies in serum but not in middle ear lavage (MEL) material or saliva. In contrast, following per oral immunization with NTHi strain 772 and Escherichia coli JM83 (pHIC348) (containing protein D gene) and, to a lesser degree after intranasal inoculation of NTHi strain 772, high saliva IgA antibodies to protein D developed, but there was no rise in antibodies to protein D in the MEL material or the sera of these animals. These results show that protein D can elicit different systemic and local antibody responses depending on the site of delivery and the form of administration. Furthermore, experimental AOM with NTHi and Hib induces systemic IgG and IgA antibodies to protein D but fails to induce a mucosal immune response. FAU - Akkoyunlu, M AU - Akkoyunlu M AD - Department of Medical Microbiology, University of Lund, Malmo, Sweden. FAU - Forsgren, A AU - Forsgren A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Denmark TA - APMIS JT - APMIS : acta pathologica, microbiologica, et immunologica Scandinavica JID - 8803400 RN - 0 (Antibodies, Bacterial) RN - 0 (Bacterial Proteins) RN - 0 (Carrier Proteins) RN - 0 (Haemophilus Vaccines) RN - 0 (Immunoglobulin A) RN - 0 (Immunoglobulin D) RN - 0 (Immunoglobulin G) RN - 0 (Lipoproteins) RN - 0 (Vaccines, Synthetic) RN - EC 3.1.4.46 (glpQ protein, Haemophilus influenzae) SB - IM MH - Animals MH - Antibodies, Bacterial/blood/*immunology MH - Bacterial Proteins/*immunology MH - Carrier Proteins/*immunology MH - Ear, Middle/immunology MH - Escherichia coli MH - Haemophilus Vaccines/administration & dosage/*immunology MH - Haemophilus influenzae/*immunology MH - Humans MH - Immunity, Mucosal MH - Immunoglobulin A/blood/immunology MH - *Immunoglobulin D MH - Immunoglobulin G/blood/immunology MH - Lipoproteins/*immunology MH - Otitis Media/immunology/microbiology MH - Rats MH - Rats, Sprague-Dawley MH - Saliva/immunology MH - Therapeutic Irrigation MH - Vaccination MH - Vaccines, Synthetic/immunology EDAT- 1996/10/01 00:00 MHDA- 1996/10/01 00:01 CRDT- 1996/10/01 00:00 PHST- 1996/10/01 00:00 [pubmed] PHST- 1996/10/01 00:01 [medline] PHST- 1996/10/01 00:00 [entrez] PST - ppublish SO - APMIS. 1996 Oct;104(10):709-17.