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  • Title: Ultrastructural and freeze fracture cilia morphology of trachea epithelium in apparently healthy small ruminants.
    Author: Roperto F, Langella M, Oliva G, Restucci B, Varricchio E, Dallai R.
    Journal: J Submicrosc Cytol Pathol; 1998 Jan; 30(1):65-9. PubMed ID: 9530853.
    Abstract:
    Specimens of tracheal mucosa were obtained from ten adult apparently healthy small ruminants (five goats and five sheep) both by a fibre optic endoscope and in a slaughterhouse. Ultrastructurally, a total of 50,000 cilia were examined. Pathological cilia were found in all examined subjects. The prevalence of compound cilia showed a range of 0.3% to 3%. Intracytoplasmic and swollen cilia ranged from 0.2% to 0.5%. The microtubular pattern was examined in 4,000 cross-sectioned cilia and an abnormal pattern was found in 5-7%. Microtubular defects involved both peripheral and central doublets, being peripheral abnormalities the prevailing ones. A central plug of electron dense material was observed in 2-3% of the examined basal bodies. Rare basal bodies characterized by an abnormal spatial configuration were also shown. Freeze fracture studies revealed a ciliary necklace composed of 4 to 5 rows of intramembrane particles.
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