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Viral Pneumonia in Guinea Pigs

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Adenovirus Infection in Guinea Pigs

 

Guinea pigs are prone to infection with a specific type of adenovirus, the guinea pig adenovirus (GPAdV), which may cause respiratory symptoms. This occurs more often in guinea pigs that are young or old (due to underdeveloped or weakened immune systems, respectively), or those that have immune systems that are not working properly. There are even guinea pigs which have GPAdV that are only carriers of the virus and display no signs of the illness whatsoever.

 

Guinea pigs do not typically die from GPAdV, but unfortunately, those that do die often die suddenly without seeming to have been sick.

 

Symptoms and Types

 

An asymptomatic infection -- or an infection in which the guinea pig does not display any symptoms -- is the most common type associated with guinea pigs. In fact, rarely does it progress to respiratory infection and pneumonia. The period of incubation lasts from 5-10 days, with a subsequent period of shedding of the virus from 10-12 days. Then, depending on whether the animal is asymptomatic or not, you may observe:

 

  • Fever
  • Depression or dull demeanor
  • Loss of appetite and weight loss
  • Respiratory distress (dyspnea)
  • Crackling sound when breathing due to congestion (rales)
  • Nasal discharge

 

Causes

 

GPAdV is transmitted between guinea pigs in several ways, including direct contact with an infected guinea pig that is sneezing or coughing. Contaminated feces and urine may or may not play a role; it is, however, best to take precautionary measures with all body fluids. Risk factors include immune deficiencies and age, whereby old and young guinea pigs are most prone to the virus.

 

Diagnosis

 

Your veterinarian might suspect an adenovirus infection by observing the symptoms exhibited by the infected guinea pig. A confirmatory diagnosis will require advanced laboratory tests on blood samples collected from the infected guinea pigs. The ELISA test is currently regarded as the most reliable test for diagnosing the GPAdV infection.

 

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