Antibodies against Streptococcus pneumoniae, Haemophilus influenzae and Branhamella catarrhalis in middle ear effusion during early phase of acute otitis media

1990 ◽  
Vol 19 (3) ◽  
pp. 311-312
1994 ◽  
Vol 111 (4) ◽  
pp. 513-518 ◽  
Author(s):  
Patrick J. Antonelli ◽  
Kathleen A. Daly ◽  
Steven K. Juhn ◽  
Erik J. Veum ◽  
George L. Adams ◽  
...  

To determine whether tobacco smoke contributes to the pathogenesis of acute otitis media, chinchillas were exposed to mainstream tobacco smoke or sham conditions (cigarettes not lit) In a Walton smoke exposure machine for 20-minute cycles two or three times daily. After 6 to 8 weeks of daily exposure. 12 chinchillas were nasally injected with Streptococcus pneumoniae, and 18 chinchillas were injected into both middle ears with nontypable Haemophilus Influenzae. Smoke or sham exposures were continued for 2 to 4 weeks after injection. Otitis media developed in none of the 12 nasally injected chinchillas and in all 18 chinchillas whose middle ears were injected with nontypable Haemophilus Influenzae. Persistence of middle ear effusion and persistence of nontypable Haemophils Influenzae in the middle ear effusion were not different between the smoke- and sham-exposed groups. This suggests that mainstream smoke exposure does not change the natural course of otitis media in the chinchilla model.


1980 ◽  
Vol 30 (2) ◽  
pp. 445-450
Author(s):  
G S Giebink ◽  
I K Berzins ◽  
S C Marker ◽  
G Schiffman

Otitis media developed in 67% of chinchillas inoculated intranasally with type 7 Streptococcus pneumoniae and influenza A virus. Only 4% of chinchillas inoculated with influenza alone and 21% of chinchillas inoculated with S. pneumoniae alone developed otitis media. Among the chinchillas that developed otitis media after inoculation with both pneumococcus and influenza, 73% of the affected ears contained effusion, and 27% of the affected ears showed tympanic membrane inflammation without middle ear effusion obtained on paracentesis. Although a majority of the ears with effusion yielded S. pneumoniae on culture, one-third of the effusions were sterile for aerobic bacteria. This model resembles conditions accompanying otitis media in humans and suggests that respiratory viral infection contributes significantly to the pathogenesis of acute otitis media.


PEDIATRICS ◽  
1985 ◽  
Vol 75 (5) ◽  
pp. 819-826
Author(s):  
Carla M. Odio ◽  
Helen Kusmiesz ◽  
Sharon Shelton ◽  
John D. Nelson

A total of 150 children with acute otitis media were randomly allocated to treatment with amoxicillin-potassium clavulanate (Augmentin) or with cefaclor. Each drug was given in a daily dosage of approximately 40 mg/kg in three divided doses for ten days. Tympanocentesis done before treatment yielded specimens that contained pneumococcus or Haemophilus sp or both in 67% of specimens. Viridans group streptococci were isolated from 10% of specimens and Branhamella catarrhalis from 6%. Patients were scheduled for followup examinations at midtreatment, end of therapy, and at 30, 60, and 90 days. Of the 150 children, 130 were evaluable. Five of 60 patients (8%) treated with cefaclor were considered therapeutic failures because of persistent purulent drainage and isolation of the original pathogen or suprainfection. There were no failures among patients treated with Augmentin (P = .019). Rates of relapse, recurrent acute otitis media with effusion, and persistent middle ear effusion were comparable in the two groups of patients. Diaper rash, or loose stools, or both were significantly more common in children treated with Augmentin (34%) than in those taking cefaclor (12%), but in no case was it necessary to discontinue medication because of these mild side effects (P = .002). Cefaclor therapy was discontinued in one patient because of severe abdominal pain and vomiting. In this study, treatment with Augmentin was superior to treatment with cefaclor in the acute phase of acute otitis media with effusion, but Augmentin produced more adverse effects. The rates of persistent middle ear effusion and recurrent acute otitis media with effusion were comparable with the two regimens.


1984 ◽  
Vol 22 (14) ◽  
pp. 53-54

Acute suppurative otitis media (AOM) is a common, painful condition affecting 20% of children under 4 years at least once a year,1 and perhaps more in infancy when clinical examination is most difficult. Infectious complications such as mastoiditis, meningitis and cerebral abscess are now rare, but chronic middle ear effusion and hearing loss remain common. Hearing loss may persist long after the infective episode,2 and may impair learning.


2017 ◽  
Vol 9 (12) ◽  
pp. 1864-1871 ◽  
Author(s):  
O. D. Ayala ◽  
C. A. Wakeman ◽  
I. J. Pence ◽  
C. M. O'Brien ◽  
J. A. Werkhaven ◽  
...  

Raman microspectroscopy was used to characterize and identify the three main pathogens that cause acute otitis media (AOM)in vitro. Cultured middle ear effusion from patients was studied and results suggest the potential of using this technique to aid in accurately diagnosing AOM and providing physicians with bacterial identification to guide treatment.


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