Salivary, serum, and abomasal mucus IgA as an immune correlate of protection against Haemonchus contortus infection in naturally infected lambs

Autor: Jordana Andrioli, Salgado, Sthefany Kamile, Dos Santos, Jesséa de Fátima França, Biz, Matheus Borges, de Carvalho, Fernanda, Rigo, Breno Castello Branco, Beirão, Alessandro Francisco Talamini do, Amarante, Leandro Batista, Costa, Cristina Santos, Sotomaior
Přispěvatelé: Pontifícia Universidade Católica do Paraná (PUCPR), Imunova Análises Biológicas LTDA, Universidade Federal do Paraná (UFPR), Universidade Estadual Paulista (UNESP)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Made available in DSpace on 2022-05-01T12:56:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-05-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) This study aimed to evaluate salivary, serum, and abomasal mucus IgA levels in lambs naturally infected with Haemonchus contortus. Thirty-seven crossbred lambs (½ Texel or ½ Ile de France) with an average age of 193 days were evaluated for 56 days after grazing on a contaminated pasture. Fecal samples were collected every 7 days to evaluate the EPG. Blood and saliva samples were collected for IgA measurement every 14 days. On D56, 29 animals were killed for parasite counting and IgA quantification in the abomasal mucus. Salivary, serum, and abomasal mucus IgA were measured by ELISA using third-stage larvae antigens. Salivary and mucus IgA were not correlated, but D14 salivary IgA correlated with EPG on D28 (r = −0.37) and D56 (r = −0.36); D28 salivary IgA correlated with D49 (r = −0.40) and D56 EPG (r = −0.44). Abomasal mucus IgA negatively correlated with EPG from D28 to D56 (r varied from _0.51 to −0.62) and with the counts of all parasitic stages (−0.60 to −0.67). The lambs were classified as susceptible (S) or resistant (R) according to EPG (D56 EPG and cumulative EPG) or IgA (salivary, serum, and mucus IgA). Based on D56 EPG and cumulative EPG, resistant lambs had higher D14 salivary IgA, mucus IgA, and total worm counts. For evaluations based on IgA levels, the EPG of S and R animals differed, indicating that IgA was an immune correlate of protection against natural infection with Haemonchus sp., mainly in the saliva sample of D14. Graduate Program in Animal Science School of Medicine and Life Sciences Pontifícia Universidade Católica do Paraná (PUCPR) Veterinary Medicine School of Life Sciences Pontifícia Universidade Católica do Paraná (PUCPR) Imunova Análises Biológicas LTDA Graduate Program in Microbiology Parasitology and Pathology Federal University of Paraná (UFPR) Institute of Biosciences UNESP–São Paulo State University, R. Prof. Dr. Antônio Celso Wagner Zanin, 250 Institute of Biosciences UNESP–São Paulo State University, R. Prof. Dr. Antônio Celso Wagner Zanin, 250
Databáze: OpenAIRE
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