otitis media/carbohydrate

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Changes in the structure of the cell surface carbohydrates of the chinchilla tubotympanum following Streptococcus pneumoniae-induced otitis media.

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Přihlášení Registrace

Streptococcus pneumoniae (Spn) are among the most frequently isolated pathogens in acute otitis media (AOM) and in otitis media with effusion (OME). Recently, the specific receptor for Spn has been identified as the trisaccharide unit Gal beta 1-4 GlcNAc beta 1-3 Gal beta with GlcNAc beta 1-3 Gal

Comparison of alteration of cell surface carbohydrates of the chinchilla tubotympanum and colonial opacity phenotype of Streptococcus pneumoniae during experimental pneumococcal otitis media with or without an antecedent influenza A virus infection.

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Experimental and clinical studies suggest that influenza A virus promotes Streptococcus pneumoniae-induced otitis media; however, the mechanism underlying this synergistic interaction has not been completely defined. In this study, glycoconjugate expression patterns were evaluated on the cell

Nitric oxide synthase activity and nitric oxide level in erythrocytes of guinea pigs with experimental otitis media with effusion.

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Free radicals have been implicated in the pathogenesis of an increasing number of disease and inflammatory states. They may cause cell and tissue damage by chemical modification of proteins, carbohydrates, nucleotides and lipids. Under physiological conditions free radicals are parts of normal

Evidence of oxygen radical injury in experimental otitis media.

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Přihlášení Registrace

Free radicals have been implicated in the pathogenesis of an increasing number of diseases and inflammatory states. They may cause tissue damage by their chemical modification of proteins, carbohydrates, nucleotides, and lipids. Lipid peroxidation occurs as a consequence of free radicals acting on

Safe as mother's milk: carbohydrates as future anti-adhesion drugs for bacterial diseases.

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The majority of infectious diseases are initiated by adhesion of pathogenic organisms to the tissues of the host. In many cases, this adhesion is mediated by lectins present on the surface of the infectious organism that bind to complementary carbohydrates on the surface of the host tissues.

Mucolytic agents and otitis media with effusion.

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Middle ear effusion was obtained from children with otitis media with effusion and separated into thick (mucoid) and thin (serous) pools. Both effusion types contained similar amounts of non-dialysable solids. However, the thick effusions contained more mucus glycoprotein than the thin effusions,

Diet as a risk factor for pneumococcal carriage and otitis media: a cross-sectional study among children in day care centers.

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BACKGROUND Pharyngeal bacteria are exposed to different sugar conditions depending on the diet of the child. We hypothesized that dietary factors such as daily intake of carbohydrates could be associated with pneumococcal carriage and the occurrence of otitis media in children. METHODS Our study

Otitis media: the chinchilla model.

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Streptococcus pneumoniae infection and disease have been modeled in several animal species including infant and adult mice, infant and adult rats, infant Rhesus monkeys, and adolescent and adult chinchillas. Most are models of sepsis arising from intravenous or intraperitoneal inoculation of

A polysaccharide of Alloiococcus otitidis, a new pathogen of otitis media: chemical structure and synthesis of a neoglycoconjugate thereof.

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Alloiococcus otitidis is a recently discovered Gram-positive bacterium that has been linked with otitis media (middle ear infections). In this study, we describe the structure of a novel capsular polysaccharide (PS) expressed by the type-strain of A. otitidis, ATCC 51267, and the synthesis of a

Induction of mucous cell metaplasia in the middle ear of rats using a three-step method: an improved model for otitis media with mucoid effusion.

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Přihlášení Registrace

Otitis media with mucoid effusion, characterized by mucous cell metaplasia in the middle ear cleft and thick fluid accumulation in the middle ear cavity, is a common otological disease that frequently affects young children. Multiple factors are involved in the development of this disease,

Effect of intranasal inoculation of Streptococcus pneumoniae on the structure of the surface carbohydrates of the chinchilla eustachian tube and middle ear mucosa.

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The changes in the cell surface carbohydrates of the eustachian tube (ET) and middle ear subsequent to the intranasal (i.n.) inoculation of Streptococcus pneumoniae (Spn) type 6A were studied in the chinchilla model of otitis media (OM) using a lectin histochemical technique with six different

Role of sialic acid and complex carbohydrate biosynthesis in biofilm formation by nontypeable Haemophilus influenzae in the chinchilla middle ear.

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Přihlášení Registrace

Nontypeable Haemophilus influenzae (NTHI) is an important pathogen in respiratory tract infections, including otitis media (OM). NTHI forms biofilms in vitro as well as in the chinchilla middle ear, suggesting that biofilm formation in vivo might play an important role in the pathogenesis and

Immunology and microbiology in acute otitis media.

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Various immunological parameters were measured in serum, middle ear fluid (MEF), and lymphocytes from peripheral blood and MEF of infants with acute otitis media due to S. pneumoniae or H. influenzae. Approximately half of 131 patients had IgE specific antibody to the infecting bacterium as

Macrophage (monocyte)-derived mucous secretagougue (MMS) is released into the fluid of the middle ear of patients with otitis media with effusion.

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Macrophage (monocyte)-derived secretagogue (MMS) is a low molecular weight peptide released by activated macrophages. This substance can enhance incorporation of carbohydrates into protein and result in the production of glycoproteins. It is believed that increased glycoproteins lead to the

A study of mucus glycoproteins in secretory otitis media.

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Přihlášení Registrace

Rheologically active mucus glycoproteins (mucins) were isolated from the middle ear effusions of 282 patients (344 ears) with secretory otitis media. Middle ear mucins from those patients with no other associated pathology were compared biochemically and biophysically with mucins from patients where

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