Genetic Analysis of the Humoral Immune Response of White Leghorn Chicks

Zijpp, A.J. van der; Leenstra, F.R.

doi:10.3382/ps.0591363

Cited by 112 publications

(43 citation statements)

References 11 publications

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“…Agglutination tests were performed and the titer was recorded as 2-ME resistant antibody. The reduction of the total titer due to 2-ME treatment was called 2-ME sensitive antibody (Van der Zijpp and Leenstra, 1980). These antibodies, MER and MES, are presumed to be IgG and IgM, respectively (Boa-Amponsem et al, 2000).…”

Section: Humoral Immune Responsementioning

confidence: 99%

Reevaluation of Methionine Requirement Based on Performance and Immune Responses in Broiler Breeder Hens

Hosseini¹,

Zaghari

Lotfollahian³

et al. 2012

J. Poult. Sci.

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This experiment was conducted to study methionine requirements in broiler breeder hens aged from 26-35 weeks. The treatments were consisted of six levels of methionine (0.2, 0.25, 0.3, 0.35, 0.4 and 0.45%), with five replicates of eight birds (Seven hens and one rooster). The results showed that different levels of methionine had no significant ( p＞0.05) effects on egg weight, unsettable (double yolk, small size) and settable eggs. The methionine levels significantly ( p＜0.05) changed egg production percentage, egg mass (g/h/d), egg content (g) and feed conversion ratio. Different levels of methionine did not affect on cell-mediated responses, newcastle and bursa diseases titer, and IgM ( p＞0.05), but total titer against sheep red blood cell (SRBC) and IgG responses were influenced (p＜ 0.05). Using of two-slope quadratic broken-line analysis indicated that methionine requirements for egg mass (g/h/d), feed conversion ratio, settable eggs, SRBC and IgG were 446, 450, 494, 580 and 492 (mg/d), respectively. In conclusion, methionine requirement for settable eggs was similar to those needed for the optimum immune responses. Since, settable eggs are an important factor in broiler breeder industries, so the authors recommend 494 mg/d methionine for broiler breeder hens. This amount is higher than those needed for egg mass and feed conversion ratio.

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Section: Humoral Immune Responsementioning

confidence: 99%

Reevaluation of Methionine Requirement Based on Performance and Immune Responses in Broiler Breeder Hens

Hosseini¹,

Zaghari

Lotfollahian³

et al. 2012

J. Poult. Sci.

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show abstract

“…Total serum antibody titers to SRBC were only determined at 21, 25 and 28 days (0, 3 and 7 days post immunization). SRBC antibody titers were assessed by agglutination according to methodology previously described by Van der Zijpp and Leenstra (1980). Antibody titers measured against SRBC were expressed as the 2 log of the reciprocal of the highest serum dilution giving complete agglutination.…”

Section: Immunological Analysismentioning

confidence: 99%

Effects of feed access after hatch and inclusion of fish oil and medium chain fatty acids in a pre-starter diet on broiler chicken growth performance and humoral immunity

Lamot

Klein

Linde

et al. 2016

animal

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Delayed feed and water access is known to impair growth performance of day old broiler chickens. Although effects of feed access on growth performance and immune function of broilers have been examined before, effects of dietary composition and its potential interaction with feed access are hardly investigated. This experiment aimed to determine whether moment of first feed and water access after hatch and pre-starter composition (0 to 7 days) affect growth rate and humoral immune function in broiler chickens. Direct fed chickens received feed and water directly after placement in the grow-out facility, whilst delayed fed chickens only after 48 h. Direct and delayed fed chickens received a control pre-starter diet, or a diet containing medium chain fatty acids (MCFA) or fish oil. At 21 days, chickens were immunized by injection of sheep red blood cells. The mortality rate depended on an interaction between feed access and pre-starter composition ( P = 0.014). Chickens with direct feed access fed the control pre-starter diet had a higher risk for mortality than chickens with delayed feed access fed the control pre-starter diet (16.4% v. 4.2%) whereas the other treatment groups were in-between. BW gain and feed intake till 25 days in direct fed chickens were higher compared with delayed fed chickens, whilst gain to feed ratio was lower. Within the direct fed chickens, the control prestarter diet resulted in the highest BW at 28 days and the MCFA pre-starter diet the lowest (Δ = 2.4%), whereas this was opposite for delayed fed chickens (Δ = 3.0%; P = 0.033). Provision of MCFA resulted in a 4.6% higher BW gain and a higher gain to feed ratio compared with other pre-starter diets, but only during the period it was provided (2 to 7 days). Minor treatment effects were found for humoral immune response by measuring immunoglobulins, agglutination titers, interferon gamma (IFN-γ), and complement activity. Concluding, current inclusion levels of fish oil (5 g/kg) and MCFA (30 g/kg) in the pre-starter diet appear to have limited (carryover) effects on growth and development, as well as on humoral immune function.

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“…Alternatively, exposure to other strains of E. coli (and even to other enteric bacteria species) generates and maintains circulating levels of crossreactive nonspecific (or natural) antibodies in the form of IgM (Reid et al 1997). If prior exposure is anticipated to be a problem, then birds with specific IgY could be identified by deactivating the background IgM with mercaptoethanol (Delhanty and Solomon 1966;Van Der Zijpp and Leenstra 1980) before use in the assay. All birds are commonly exposed to many different strains of E. coli (e.g., in their commensal microflora and diet), but the specific strain used in this assay has evidently not been previously isolated from birds (BIOSIS database search, June 2005).…”

Section: Among-species Differencesmentioning

confidence: 99%

Capture Stress and the Bactericidal Competence of Blood and Plasma in Five Species of Tropical Birds

Matson

Tieleman

Klasing³

2006

Physiological and Biochemical Zoology

192

218

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Genetic Analysis of the Humoral Immune Response of White Leghorn Chicks

Cited by 112 publications

References 11 publications

Reevaluation of Methionine Requirement Based on Performance and Immune Responses in Broiler Breeder Hens

Reevaluation of Methionine Requirement Based on Performance and Immune Responses in Broiler Breeder Hens

Effects of feed access after hatch and inclusion of fish oil and medium chain fatty acids in a pre-starter diet on broiler chicken growth performance and humoral immunity

Capture Stress and the Bactericidal Competence of Blood and Plasma in Five Species of Tropical Birds

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