STUDIES ON THE PATHOLOGICAL CHANGES OF THE UPPER RESPIRATORY TRACT OF THE PNEUMOCONIOTICS : 2. Observation in the Experimental Silicosis of Rabbits.

Natural or experimental infection of domestic cats and virus transmission from humans to captive predatory cats suggest that felids are highly susceptible to SARS-CoV-2 infection. However, it is unclear which cells and compartments of the respiratory tract are infected. To address this question, primary cell cultures derived from the nose, trachea, and lungs of cat and lion were inoculated with SARS-CoV-2. Strong viral replication was observed for nasal mucosa explants and tracheal air–liquid interface cultures, whereas replication in lung slices was less efficient. Infection was mainly restricted to epithelial cells and did not cause major pathological changes. Detection of high ACE2 levels in the nose and trachea but not lung further suggests that susceptibility of feline tissues to SARS-CoV-2 correlates with ACE2 expression. Collectively, this study demonstrates that SARS-CoV-2 can efficiently replicate in the feline upper respiratory tract ex vivo and thus highlights the risk of SARS-CoV-2 spillover from humans to felids.

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STUDIES ON THE PATHOLOGICAL CHANGES OF THE UPPER RESPIRATORY TRACT OF THE PNEUMOCONIOTICS : 1. Clinical Observations on the Nasal Cavity.

Sangyo Igaku ◽

10.1539/joh1959.2.749 ◽

1960 ◽

Vol 2 (9) ◽

pp. 749-757

Author(s):

Ikuhumi HIGUCHI

Keyword(s):

Respiratory Tract ◽

Nasal Cavity ◽

Upper Respiratory Tract ◽

Pathological Changes ◽

Clinical Observations ◽

Upper Respiratory

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Sinonasal cysts causing dyspnoea in two cattle – case report

Acta Veterinaria Hungarica ◽

10.1556/004.2018.049 ◽

2018 ◽

Vol 66 (4) ◽

pp. 553-561

Author(s):

Anna Stanitznig ◽

Karsten Velde ◽

Thomas Wittek ◽

Sonja Franz

Keyword(s):

Veterinary Medicine ◽

Case Report ◽

Respiratory Tract ◽

Respiratory Distress ◽

Clinical Sign ◽

Upper Respiratory Tract ◽

Pathological Changes ◽

Laser Technique ◽

Upper Respiratory ◽

The University

Two cattle were referred to the University Clinic for Ruminants of the University of Veterinary Medicine in Vienna. The main clinical sign in both cattle was dyspnoea with nasal stridor. Clinical examination of the upper respiratory tract was conducted, supplemented by ultrasonography, endoscopy and radiography. In addition, histological, bacteriological, and cytological examinations of different specimen materials were performed. The cow of Case 1 suffered from cystic nasal conchae, which was treated successfully by a laser technique. The cow of Case 2 also suffered from cystic nasal conchae. No surgery was performed in this case because the cyst opened spontaneously the day after diagnostic endoscopic procedures had been performed and the animal did not show any respiratory signs anymore. Pathological changes in the upper respiratory tract, such as nasal obstructions, should be included in the list of differential diagnoses in cattle showing respiratory distress.

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Post-slaughter changes in rabbit carcasses in Poland between 2010 and 2018

Medycyna Weterynaryjna ◽

10.21521/mw.6294 ◽

2019 ◽

Vol 75 (10) ◽

pp. 6294-2019

Author(s):

ŁUKASZ DROZD ◽

WALDEMAR PASZKIEWICZ ◽

RENATA PYZ-ŁUKASIK ◽

MONIKA ZIOMEK ◽

KRZYSZTOF SZKUCIK

Keyword(s):

Infectious Diseases ◽

Respiratory Tract ◽

Fold Increase ◽

Parasitic Diseases ◽

Upper Respiratory Tract ◽

Pathological Changes ◽

Respiratory Tract Disease ◽

Internal Organs ◽

Upper Respiratory ◽

Tract Disease

The aim of the study was to analyze the results of sanitary and veterinary examinations of rabbits carried out by the Veterinary Inspectorate in slaughterhouses in Poland in 2010-2018. In this period, 8,980,660 rabbits were examined. Lesions and quality deviations were found in 42,779 carcasses, i.e. 0.48% of all carcasses examined. The most frequent causes of the rejection of the carcasses and internal organs of the rabbits examined were sepsis and pyaemia (36,369 cases), followed by excessive emaciation (1,686 cases), upper respiratory tract disease (1,655 cases), other causes not specified by name (1,438 cases), and coccidiosis (1,318 cases). Abnormal exsanguination (303), parasitic diseases other than coccidiosis (67), infectious diseases (14), and leukemia (2) were much less often the cause of rejection. During the period analyzed, there was a decrease in the number of cases of coccidiosis (except in 2017) and other parasitic diseases, but there was a several-fold increase in the occurrence of sepsis and pyaemia (in the years 2015-2018). Compared with the results of veterinary and sanitary examinations of rabbits in 2000-2010, there was an increase in the number of rabbits slaughtered and a reduction in the percentage of carcasses with pathological changes and carcasses deemed unfit for consumption. In the years 2010-2018, there was also an increase in the number of cases of sepsis and pyaemia and a significant decrease in the percentage of parasitic diseases (mainly coccidiosis).

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