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The larvae then travel to the lungs via the lymphatic system or the bloodstream.  These can be seen as nodules on the lungs.  They then hatch out, and are coughed up and swallowed.  The parasite enters the alimentary tract, and is passed out in the faeces.
 
The larvae then travel to the lungs via the lymphatic system or the bloodstream.  These can be seen as nodules on the lungs.  They then hatch out, and are coughed up and swallowed.  The parasite enters the alimentary tract, and is passed out in the faeces.
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==Clinical==
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=== Aelurostrongylosis ===
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*Often asymptomatic; serious respiratory problems usually due to deficient immunity.
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*Prognosis poor.
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*Post mortem examination reveals greenish nodules in lungs.
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*Histopathology diferentiates these from tuberculosis.
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*Infections often asymptomatic, but can cause serious respiratory problems, especially in immunocompromised cats.[[File:Example.jpg]]
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Fenbendazole is licensed for treatment.
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*Live in [[Lungs Inflammatory - Pathology|lung parenchyma]] and [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|small bronchioles]]
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*Grossly:
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**Firm yellow nodules scattered throughout parenchyma, more frequently at periphery
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*Microscopically:
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**Eggs and larvae in the alveolar spaces cause a foreign body type reaction (surrounded by mononuclear cells and giant cells)
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**Submucosal gland hypertrophy and smooth muscle hypertrophy in airway and vessel walls
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*Associated clinical signs are mild although heavy infestations may -> chronic coughing
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*The airway eosinophilia which may be detected can be confused with a diagnosis of asthma
      
[[Category:Metastrongyloidea]][[Category:Cat_Nematodes]]
 
[[Category:Metastrongyloidea]][[Category:Cat_Nematodes]]
 
[[Category:To_Do_-_Max]]
 
[[Category:To_Do_-_Max]]
 
[[Category:Respiratory Parasitic Infections]]
 
[[Category:Respiratory Parasitic Infections]]
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