Facultative Pasteurella ophthalmitis in Hooded Lister rats
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Abstract:
Hooded Lister rats were found to exhibit symptoms of Mycoplasma pulmonis infection. During the course of this chronic respiratory disease they developed ophthalmia and conjunctivitis which proved to be an opportunist infection with Pasteurella multocida. The severity of disease varied in individual rats, newborn rats entirely escaping infection. All cases responded to treatment with appropriate topical antibiotic and no sequelae were observed.
Insights
Hooded Lister rats developed secondary Pasteurella multocida infections during chronic Mycoplasma pulmonis respiratory disease. Topical antibiotics effectively treated the opportunistic infections, with no lasting side effects observed in the rats.
Area of Science:
- Veterinary Medicine
- Infectious Diseases
- Rodent Models
Background:
- Mycoplasma pulmonis is a common respiratory pathogen in rats.
- Chronic respiratory infections can predispose rodents to secondary bacterial infections.
Purpose of the Study:
- To investigate the occurrence and characteristics of secondary ocular infections in rats with Mycoplasma pulmonis.
- To evaluate the efficacy of antibiotic treatment for these opportunistic infections.
Main Methods:
- Observation of Hooded Lister rats naturally infected with Mycoplasma pulmonis.
- Identification of secondary bacterial pathogens.
- Clinical assessment of ophthalmia and conjunctivitis.
- Treatment with topical antibiotics.
Main Results:
- Ophthalmia and conjunctivitis were observed as secondary opportunistic infections.
- Pasteurella multocida was identified as the causative agent in these ocular infections.
- Disease severity varied, with younger rats showing less susceptibility.
- All affected rats responded well to topical antibiotic therapy.
- No long-term complications or sequelae were noted post-treatment.
Conclusions:
- Pasteurella multocida frequently causes opportunistic ocular infections in rats with Mycoplasma pulmonis.
- Prompt topical antibiotic treatment is effective in resolving these secondary infections without adverse effects.