Cavia Model for Secretory Otitis Media (SOM) Cavia (Guinea pig ) Disease model

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Overview
Properties
  • Prototype SpeciesHuman
  • SourceS. pneumoniae with secretory otitis media
  • Model Animal StrainsGuinea pig, healthy, male and female, body weight 350g~700g
  • Modeling GroupingRandomly divided into six group: Control group, Model group, Positive drug group and Test drug group.
  • Modeling Period4-6 weeks
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  • Cavia Model for Secretory Otitis Media (SOM) Packages (Simulation)
  • Cavia Model for Secretory Otitis Media (SOM) Packages (Simulation)
  • Certificate ISO9001: 2008, ISO13485: 2003 Registered

Modeling Method

Preuer (Preyer) reflected normal guinea pigs, weight of 300 ~ 420g, the first otoscopy, excluding the external and middle ear disease, were tested 0.5,1.0,2.4 kHz 100 dB short pure tone ear reflex valve. Intraperitoneal injection of pentobarbital sodium was injected at 30mg / kg body weight. After anesthesia, the right external auditory canal was cleared and the external auditory canal was disinfected with 2% iodine tincture and 75% ethanol. 3X108 CFU / ml inactivated pneumonia Streptococcal suspension 0.1ml by tympanic membrane before and below into the animal tympanum, before injection culture on the agar medium to ensure that no live strain growth, to prevent acute infection. The model animals were examined by ear examination at 2 to 10 days after the suspension of the injected bacteria, and the color change of the tympanic membrane was observed. Followed by animal anesthesia after the death, take bilateral listening to the bubble, fixed with formaldehyde after stripping, paraffin embedded sections, conventional HE staining, light microscopy.

Model evaluation

Pathological results

Cytokines level

Statistical analysis

SPSS software is used for statistical analysis, measurement data to mean ± standard deviation (x ±ｓ), using t test and single factor analysis of variance for group comparison , P<0.05 indicates there was a significant difference, P<0.01 indicates there are very significant differences.

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