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001-es BibID:	BIBFORM030382
Első szerző:	Pap Péter László (ökológus)
Cím:	The Effect of Coccidians on The Condition and Immune profile of Molting House Sparrows (Passer domesticus) / Péter László Pap, Csongor István Vágási, Gábor Árpád Czirják, Adriana Titilincu, Adela Pintea, Gergely Osváth, Attila Fülöp, Zoltán Barta
Dátum:	2011
ISSN:	0004-8038
Megjegyzések:	Feather molt is recognized as an energetically costly activity for birds, and parasite infestation during molt has the potential to reduce host fitness because parasites sequester essential nutrients and stimulate the immune system. We manipulated the coccidian parasite load of captive male House Sparrows (Passer domesticus) by suppressing the natural infection of control birds with an anticoccidial drug and infecting experimental birds with coccidian oocysts. Following infestation, the effect of chronic coccidian infection on individual condition, molt and 12 indices of physiological and immunological function was assessed. We found a significant positive relationship between infestation and heterophil/lymphocyte ratio measured at capture, indicating infectioninduced stress. We also found that coccidians negatively affected feather growth during molt: the increase in wing length of the noninfected birds was significantly higher than that of infected birds. In comparison to control birds, infected birds showed a significantly higher concentration of white blood cells and greater blood bactericidal activity. There was also a positive correlation between infection intensity, agglutination and lysis of blood in the experimentally infested birds, which indicated activation of the constitutive innate immune system during infection. Finally, the total antioxidant capacity of the blood increased significantly, while the carotenoid concentration decreased significantly in infected compared with control birds. Therefore, we showed that coccidians stimulated several measures of the constitutive innate immunity, including the bactericidal activity of the blood, and that coccidians can have significant negative effects on the health and possibly fitness of molting House Sparrows
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban aviary bacteria killing capacity complement experimental infection feather quality immune response, Isospora natural antibodies
Megjelenés:	The auk. - 128 : 2 (2011), p. 330-339. -
További szerzők:	Vágási Csongor István Czirják Gábor Árpád Titilincu, Adriana Pintea, Adela Osváth Gergely (1985-) (biológus) Fülöp Attila (1987-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM018775
Első szerző:	Pap Péter László (ökológus)
Cím:	Carotenoids modulate the effect of coccidian infection on the condition and immune response in moulting house sparrows / Péter László Pap, Csongor István Vágási, Gábor Árpád Czirják, Adriana Titilincu, Adela Pintea, Zoltán Barta
Dátum:	2009
Megjegyzések:	In the present study, we experimentally manipulated coccidian parasitism and dietary carotenoid availability in a fully factorial experiment in male house sparrows (Passer domesticus Linnaeus), and tested whether carotenoid supplementation reduces the cost of parasitism in terms of condition, moult and immune responses. We found that coccidians have a significant but transient negative effect on body mass, which can be reduced if birds have access to carotenoid supplementation in their diet. Experimental manipulation had no significant effect on the moulting parameters of the birds measured following coccidian infestation and during the whole moulting period. Carotenoid supplementation increased the plasma carotenoid concentration in both infested and medicated birds treated with a coccidiostatic drug; however, after two months exposure to parasites, plasma carotenoid concentration increased only in the carotenoid-supplemented and medicated group whereas no difference was observed between the carotenoid-supplemented and infested and non-supplemented groups. On the contrary, coccidian infestation was not affected by carotenoid supplementation. Experimental infestation decreased the antibody response to sheep red blood cells (SRBCs), although no significant effect was observed in the capacity of the birds to respond to a mitogenic challenge with phytohemagglutinin. Within the experimentally infested groups birds with carotenoid-supplemented food tended to have an increased anti-SRBC humoral immune response. The positive correlation between coccidian infestation and the strength of the humoral immune response against SRBCs in the non-supplemented and infested groups indicates that this part of the immune system plays an important role in defence against these parasites.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban aviary, carotenoid supplementation, experimental infection, humoral immune response, Isospora, Passer domesticus.
Megjelenés:	Journal of Experimental Biology. - 212 (2009), p. 3228-3235. -
További szerzők:	Vágási Csongor István Czirják Gábor Árpád Titilincu, Adriana Pintea, Adela Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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Saját polcon: