Pulmonary Capillariasis

Introduction: The pathogen of pulmonary capillary nematodes is capillary family, capillary genus pulmonary capillary nematode worms, parasitic in the bronchi and trachea of foxes, dogs and cats, sometimes also found in the nasal cavity and frontal sinuses. Severe infection often causes chronic bronchitis, tracheitis or rhinitis. Based on symptoms, stool or nasal fluid examination for eggs can confirm the diagnosis. Levamisole and mebendazole can be used for treatment. Prevention is mainly to keep the kennels and cattery dry and improve environmental sanitation.

Pulmonary capillary nematode disease (capillariasis) pathogenic capillary family, Capillary genus pulmonary capillary nematodes, parasitic in the bronchi and trachea of foxes, dogs and cats, sometimes seen in the nasal cavity and frontal sinuses.

Pathogen

Adults are slender, milky white. The male body is 15-25mm long, with 2 tail fins at the tail and 1 slender mating spine, which has a sheath. Females are 20-40mm long, and the vulva opening is close to the end of the esophagus.

The eggs are drum-shaped, with a size of 59-80μm×30-40μm. The shell is thick, streaked, light green, and there is an egg plug at each end.

Life History

Directly develop. The female lays eggs in the lungs, and the eggs go up to the pharynx along with the sputum, and after swallowing, they enter the digestive tract and are excreted with feces. Under suitable external conditions, it takes 5 to 7 weeks to develop into infectious eggs.

After the host ingests the infective eggs, the larvae hatch in the small intestine. The larvae enter the intestinal mucosa and migrate to the lungs with the blood. Larvae developed into adults 40 days after infection.

Symptom

Severe infection often causes chronic bronchitis, tracheitis or rhinitis. Sick dogs runny nose, cough, dyspnea, and then become thin, anemia, rough coat and so on.

Diagnosis

Based on symptoms, stool or nasal fluid examination for eggs can confirm the diagnosis.

Treatment and Prevention

  • Levamisole: 5mg per kilogram of body weight, once a day, orally, for 5 consecutive days, and repeat the drug 1 time after stopping the drug for 9 days.
  • Mebendazole: 6 mg per kg body weight, 2 times/d, for 5 consecutive days.
  • Prevention is mainly to keep the kennels and cattery dry and improve environmental sanitation.