Molecular detection of Treponema species organisms in foremilk and udder cleft skin of dairy cows with digital dermatitis
Ver/Abrir
Autor/a
Sobhy, Nader Maher
Mahmmod, Yasser S.
Refaai, Walid
Awad, Ashraf
Fecha de publicación
2019-09-13ISSN
0049-4747
Resumen
Identification of reservoirs and transmission routes of digital dermatitis (DD)-associated Treponema spp. is considered an effective means for controlling DD infection in dairy cows. The objective of this study is to identify and characterize the potential reservoir niches for DD-associated Treponema spp. from healthy udder cleft skin and foremilk in lactating dairy cows. A large dairy farm was visited weekly from March to July 2015. Clinical investigation revealed that a total of 25 lame cows had DD lesions located at the plantar aspect of the interdigital cleft. A total of 75 samples, three per cow, were collected including deep swabs from DD lesions (n = 25), non-aseptically collected foremilk samples (n = 25) and skin swabs from udder cleft (n = 25). Treponema spp. were identified using nested PCR assays and confirmed by DNA sequencing. Results revealed that Treponema phagedenis (T. phagedenis)-like was the most identified species in the foremilk 40% (10/25), in comparison with DD lesions and udder cleft skin samples with 32% (8/25) and 20% (5/25), respectively. On the other hand, Treponema pedis (T. pedis) was the most identified species in the udder cleft skin 80% (20/25), in comparison with DD lesions and foremilk samples with 68% (17/25) and 60% (15/25), respectively. None of the examined samples were identified by PCR as containing DNA from Treponema medium (T. medium) or Treponema vincentii (T. vincentii)-like. To the best of our knowledge, this is the first report for detection of T. phagedenis-like and T. pedis from healthy skin of udder cleft and foremilk samples. Detection of DD Treponema spp. from udder cleft skin and foremilk samples indicates that these sites could be potential reservoirs for spirochetes involved in DD. Udder cleft skin and foremilk may have a role in transmission routes of DD Treponema in dairy farms.
Tipo de documento
Artículo
Versión del documento
Versión aceptada
Lengua
English
Materias (CDU)
619 - Veterinaria
Páginas
21
Publicado por
Springer
Publicado en
Tropical Animal Health and Production
Citación
Sobhy, Nader Maher, Yasser S. Mahmmod, Walid Refaai, and Ashraf Awad. 2019. "Molecular Detection Of Treponema Species Organisms In Foremilk And Udder Cleft Skin Of Dairy Cows With Digital Dermatitis". Tropical Animal Health And Production 52 (2): 815-821. Springer Science and Business Media LLC. doi:10.1007/s11250-019-02072-0.
Program
Sanitat Animal
Este ítem aparece en la(s) siguiente(s) colección(ones)
- ARTICLES CIENTÍFICS [2831]
Excepto si se señala otra cosa, la licencia del ítem se describe como http://creativecommons.org/licenses/by-nc-nd/4.0/