Effects of Subcutaneous Ochratoxin-A Exposure on Immune System of Broiler Chicks
AbstractOchratoxin A (OTA), an immunosuppressive mycotoxin, can increase the risk of many infectious diseases and contribute to economic losses to the poultry industry. The immunosuppressive effect has mainly been investigated through oral exposure; however, birds may also be contaminated through skin absorption. The present study investigated the influence of OTA exposure on the defense system of broiler chicks through the subcutaneous route and including low doses. Groups of broiler chicks (Cobb), 05 days old, were exposed to subcutaneous inoculation of OTA at concentrations of 0.1; 0.5; 0.9; 1.3; and 1.7 mg OTA/kg body weight. The size of the lymphoid organs, circulating immune cells, and total IgY and IgA levels were evaluated 21 days post inoculation. Subcutaneous OTA exposure decreased the weight of the thymus, spleen, and bursa of Fabricius, and leukocytopenia (p < 0.05) was detected in chicks of the OTA treated groups. In a dose-dependent way, decreased levels of circulating lymphocytes and heterophils (p < 0.05), and increased levels of monocytes (p < 0.05) were detected. Decreased IgY and IgA serum concentrations were noted in the OTA treated groups (p < 0.05). In conclusion, subcutaneous OTA exposure induces immunosuppression even at low levels. View Full-Text
Share & Cite This Article
Khan, S.A.; Venancio, E.J.; Ono, M.A.; Fernandes, E.V.; Hirooka, E.Y.; Shimizu, C.F.; Oba, A.; Flaiban, K.K.M.C.; Itano, E.N. Effects of Subcutaneous Ochratoxin-A Exposure on Immune System of Broiler Chicks. Toxins 2019, 11, 264.
Khan SA, Venancio EJ, Ono MA, Fernandes EV, Hirooka EY, Shimizu CF, Oba A, Flaiban KKMC, Itano EN. Effects of Subcutaneous Ochratoxin-A Exposure on Immune System of Broiler Chicks. Toxins. 2019; 11(5):264.Chicago/Turabian Style
Khan, Shahzad A.; Venancio, Emerson J.; Ono, Mario A.; Fernandes, Eduardo V.; Hirooka, Elisa Y.; Shimizu, Cleverson F.; Oba, Alexandre; Flaiban, Karina K.M.C.; Itano, Eiko N. 2019. "Effects of Subcutaneous Ochratoxin-A Exposure on Immune System of Broiler Chicks." Toxins 11, no. 5: 264.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.