title: Comparative analysis of mucosal immunity to Mycoplasma hyopneumoniae in Jiangquhai porcine lean strain and DLY piglets.
abstract: The Jiangquhai porcine lean strain (JQHPL) is a new pork meat-type strain that has been developed in recent years from the parent lines Duroc, Fengjing, and Jiangquhai pigs (DurocxFengjing pigxJiangquhai pig). Enzootic pneumonia (EP) in pigs induced by Mycoplasma hyopneumoniae (M. hyopneumoniae) is a chronic respiratory disease of pigs, generating high economic losses in the swine industry. Here, we investigated the degree of resistance to M. hyopneumoniae for the Jiangquhai porcine lean strain and the Duroc x Landrace x Yorkshire (DLY) pigs, which are Western commercial pigs that have been introduced in China. A total of 209 DLY piglets and 221 JQHPL piglets from 19 Landrace x Yorkshire and 22 JQHPL M. hyopneumoniae positive gestating sows with different expected dates of confinement were selected and raised in the same M. hyopneumoniae positive farrowing barn. When the oldest suckling piglets were 37 days old, nasal swabs were collected from all the piglets (ranging from 4 to 37 days old) to detect the M. hyopneumoniae pathogen using n-PCR and M. hyopneumoniae specific SIgA using ELISA. Positive M. hyopneumoniae infection rates in both the strains increased with age; however, positive rates for JQHPL were lower compared to DLY at 14 to 35 days old. The level of the specific SIgA rose rapidly in JQHPL respiratory tracts, particularly in piglets 21 to 35 days in age compared to DLY piglets of the same age; however, the level of the specific SIgA in DLY also marginally increased. In conclusion, JQHPL pigs exhibits higher resistance to M. hyopneumoniae compared to DLY. It is possible that this characteristic is caused by the faster and stronger mucosal immunity phenotype of the JQHPL strain.
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: L Z
authors: LZ
authors: Hua
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: Y Z
authors: YZ
authors: Wu
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: F F
authors: FF
authors: Bai
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: K K
authors: KK
authors: William
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: Z X
authors: ZX
authors: Feng
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: M J
authors: MJ
authors: Liu
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: J T
authors: JT
authors: Yao
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China.
authors: X
authors: X
authors: Zhang
authors: Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-Products, Nanjing, China gqshaojaas@gmail.com.
authors: G Q
authors: GQ
authors: Shao
mesh_terms: D000367:Age Factors; D000818:Animals; D000833:Animals, Suckling; D000907:Antibodies, Bacterial / Q000096:biosynthesis*; D001947:Breeding; D005260:Female; D018928:Immunity, Mucosal; D007070:Immunoglobulin A / Q000096:biosynthesis*; D008460:Meat; D045705:Mycoplasma hyopneumoniae / Q000276:immunology*; D009297:Nasal Mucosa / Q000276:immunology / Q000382:microbiology; D045729:Pneumonia of Swine, Mycoplasmal / Q000276:immunology* / Q000382:microbiology; D011247:Pregnancy; D013552:Swine
chemical_list: D000907:Antibodies, Bacterial; D007070:Immunoglobulin A