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The lower respiratory tract is anatomically composed of several vital structures, including the larynx, trachea, bronchial tree, alveoli, lungs, and pleurae. Each component has a specific function, and all are intricately connected to ensure efficient respiration.
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The respiratory system is comprised of the organs that enable breathing. Air enters the nostrils and mouth, followed by the pharynx (throat) and larynx (voice box), which lead to the trachea (windpipe). In the thoracic cavity, the trachea splits into two bronchi that allow air to enter the lungs. The bronchi split into progressively smaller bronchioles and terminate in small groups of tiny sacs in the lungs called alveoli, where gas exchange occurs.
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Anatomy of Respiratory System I: Upper Respiratory Tract01:29

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The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
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Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
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Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
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The respiratory system is a complex biological apparatus that facilitates the exchange of gases, specifically oxygen and carbon dioxide, between our bodies and the environment. This system plays a vital role in the physiological process of respiration, an essential function for sustaining life.
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Respiratory disease in ball pythons (Python regius) experimentally infected with ball python nidovirus.

Laura L Hoon-Hanks1, Marylee L Layton1, Robert J Ossiboff2

  • 1Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA.

Virology
|January 14, 2018
PubMed
Summary
This summary is machine-generated.

Ball python nidovirus (BPNV) causes respiratory disease in snakes. Experimental infections confirmed BPNV leads to clinical signs and lung lesions, establishing a causal link.

Keywords:
Ball pythonBarnivirusExperimental infectionKoch's postulatesNidovirusPneumoniaRespiratory diseaseTorovirinae

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Area of Science:

  • Veterinary Virology
  • Herpetological Pathology

Background:

  • Nidoviruses are implicated in respiratory disease across diverse species.
  • A novel nidovirus has been circumstantially linked to respiratory illness in reptiles and cattle.

Purpose of the Study:

  • To experimentally determine if ball python nidovirus (BPNV) causes respiratory disease in ball pythons (Python regius).
  • To elucidate the pathological outcomes and transmission dynamics of BPNV infection.

Main Methods:

  • Ball pythons were experimentally infected with BPNV via oral and intratracheal routes.
  • Viral detection utilized qRT-PCR, immunohistochemistry, Western blot, and virus isolation from swabs and tissues.
  • Histopathological analysis was performed on infected and control snakes.

Main Results:

  • Infected snakes exhibited clinical signs including oral redness, mucus, open-mouth breathing, and anorexia.
  • Viral RNA, protein, and infectious virus were detected in multiple sample types from infected snakes.
  • Histopathology revealed chronic-active mucinous inflammation in the respiratory and digestive tracts, along with interstitial pneumonia.

Conclusions:

  • This study establishes a causal relationship between BPNV infection and respiratory disease in ball pythons.
  • Findings provide insights into the pathogenesis and transmission of BPNV.
  • This research is crucial for understanding and managing nidovirus-associated diseases in reptiles.