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Related Experiment Videos

Subpleural lymph nodes in goat lungs.

G Valero1, M R Alley, B W Manktelow

  • 1Departamento de Fisiopatologia, CENID-Microbiologia INIFAP-SARH, Km 15.5 carretera Mexico-Toluca, Mexico DF 03100, Mexico.

New Zealand Veterinary Journal
|June 1, 1993
PubMed
Summary

Subpleural lymph nodes were identified in over 4% of goat lungs, with prevalence varying by flock and breed. Their occurrence correlated with carcass weight and lung lesions, differing from cattle nodules.

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Area of Science:

  • Veterinary Pathology
  • Goat Respiratory Health
  • Comparative Pulmonary Anatomy

Background:

  • Subpleural lymph nodes are occasionally observed in various animal species.
  • Their significance and prevalence in goats, particularly in relation to respiratory disease, are not well-characterized.
  • Existing literature primarily describes pulmonary lymphoid nodules in cattle associated with specific parasitic infections.

Purpose of the Study:

  • To investigate the prevalence and characteristics of subpleural lymph nodes in goat lungs.
  • To identify potential associations between subpleural lymph nodes and factors like goat breed, flock, carcass weight, and lung lesions.
  • To compare the morphology of these structures with known pulmonary lymphoid nodules in other species.

Main Methods:

  • A slaughterhouse-based survey was conducted on 3245 goat lungs.
  • Data collected included the presence and frequency of subpleural lymph nodes, flock of origin, goat breed (feral, crossbred, Angora), carcass weight, and presence of nodular Muellerius lesions.
  • Histopathological examination was performed to characterize the distribution and architecture of the lymph nodes.

Main Results:

  • Subpleural lymph nodes were detected in 4.1% of the surveyed goat lungs.
  • Frequency varied significantly between flocks (2% to 27%).
  • These nodes were more prevalent in feral goats compared to crossbreds and Angoras.
  • Node occurrence showed a positive association with increased carcass weight and the number of nodular Muellerius lesions.
  • The observed distribution and architecture differed from pulmonary lymphoid nodules in cattle with dictyocaulus re-infection.

Conclusions:

  • Subpleural lymph nodes are a notable finding in goat lungs, with variable prevalence influenced by flock management and host factors.
  • Their association with Muellerius lesions suggests a potential role or consequence related to parasitic lung infections in goats.
  • Further research is warranted to elucidate the precise function and clinical relevance of these structures in caprine respiratory health.

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