Risk Factors Associated with Passive Immunity, Health, Birth Weight and Growth Performance in Lambs: II. Effects of Passive Immunity and Some Risk Factors on Growth Performance During the First 12 Weeks of Life

Abstract

SummaryThe primary objective of this study was to evaluate the relationship between passive immunity and growth performance in lambs in neonatal and post-neonatal periods. The study also evaluated the effect of gender, type of birth, birth weight and health of lambs, lambing season and dam's age on growth performance. This study included two crossbred Akkaraman flocks (n=301) in Kars, Turkey. The results disclosed that serum IgG concentration determined at 24 th of birth (SIgG-24) was significantly associated with growth performance in both periods (P<0.001) but this relationship was poor (R 2 =0.148 to 0.198). Neonatal growth performance was influenced only by birth weight, health status, SIgG-24 and type of birth (R 2 =0.527 to 0.721 P<0.001) on multiple stepwise regression analyses. The study also disclosed that post-neonatal growth performance was affected by all variables (P<0.001 R 2 =0.471 to 0.472). This study suggested that passive transfer cause a significant amount of variation in growth performance for lambs from birth to 12 weeks of life, a conclusion that has not previously been identified. It also disclosed positive association among growth performance, birth weight, type of birth, gender, health status of lambs, dam's age and lambing season. The growth performance was rendered by dam's age (≤2 years old), twin lambs, female lambs, winter lambing, illness, and birth weight of ≤3 kg. These factors should be taken into consideration and dealt with in order to increase growth performance so that which farm productivity and profitability is maintained. .471-0.472). Bu çalışma kuzularda pasif immunitenin ilk 12 haftalık dönem büyüme performası ile önemli oranda varyasyon gösterdiğini işaret etmektedir. Bu sonuç daha önce değerlendirilmemiştir. Çalışmada ayrıca doğum ağırlığı, doğum tipi, cinsiyet, sağlık durumu, anne yaşı ve kuzulama sezonunun da büyüme performansı üzerine etkili olduğu belirlendi. Kuzularda anne yaşının ≤2 olması, ikiz, dişi ve kış sezonunda doğması, hastalığa maruz kalması ve doğum ağırlığının ≤3 kg olmasıınn büyüme performansını azalttığı saptandı. Bu faktörler büyüme performansını artırmak için dikkatle ele alınması gerekmektedir. Böylece çiftlik verimliliği ve karlılığı arttırılabilir. This study was supported by TUBITAK (Project code; TOVAG 110 O 847)

Kuzularda Serum ve Kolostral IgG (Pasif İmmünite) Konsantrasyonlarının Total Protein ve Sağlık İle İlişkisi

“…PTS determination of newborns is also valuable in routine herd health programs, observation during disease investigations and in the assessment of individual neonates with questionable colostral intake [8,9,24] . Passive transfer of immunity prevents disease and enhances growth performance not only in the short term, such as in neonatal period, but also in the long term, such as the post-weaning period in lambs [5,8,9,18,27] . Inadequate PTS may not be effect health provided that sanitation is excellent, but adequate PTS may be sufficient even if poor sanitation and extreme infectious pressure exist [8,9,27] .…”

“…Zinc sulfate turbidity (ZST) test was utilized and the results were designated by several researchers as <12 [12] and <20 units [15] in 1-to 2-day-old lambs. The model predicting STPC based on ZST units for 1-day-old lambs revealed that STPC of 5.2 and 5.4 g/dL were equivalent to 10 and 12 ZST units, respectively [18] . This was the only study exist in the literature relating STPC with neonatal diseases in lambs and no STPC threshold was used for morbidity risk.…”

“…Passive immunity and growth performance are critical for lambs in the neonatal period [18] . Determining passive immune status accurately and in a timely fashion is important for taking preventive measures [5,22] .…”

“…Therefore, passive immunity plays a critical determining role in the short-term health and survival for lambs until their own immune system begins functioning fully. Numerous studies in the past three decades correlated neonatal diseases with inadequate serum IgG, in other words, FPT in animals and thus suggested the importance of IgG in the prevention of infections and enhancing growth performance in neonates [1,2,5,8,9,14,[16][17][18] .…”

Avaliação da transferência de imunidade passiva e de constituintes séricos de cordeiros Santa Inês nascidos de partos simples e gemelares no semiárido paraibano

“…Alguns outros fatores também podem levar à falha na transferência de imunidade passiva, como ocorre em casos de ovelhas primíparas ou mais velhas, de partos gemelares (Halliday 1976, Hunter et al 1977, McGuire et al 1983, Bekele et al 1992, Christley et al 2003, de parições durante o inverno (Gokçe et al 2013), por desnutrição das ovelhas durante a gestação (Halliday 1978, Mellor & Murray 1985, 1986, pelo nascimento de cordeiros prematuros ou com baixo peso ao nascimento (Gokçe et al 2013). Portanto, é de extrema importância o reconhecimento desses fatores, pois pode fornecer bases e fundamentos para a adoção de medidas preventivas que evitem ou diminuam a incidência dessa condição em um rebanho.…”