The association of Triatoma maculata(Ericsson 1848) with the gecko Thecadactylus rapicauda(Houttuyn 1782)(Reptilia:Squamata:Gekkonidae):a strategy of domiciliation of the Chagas disease peridomestic vector in Venezuela?

Objective:To investigate the bioecological relationship between Chagas disease peridomestic vectors and reptiles as source of feeding.Methods:In a three-story building,triatomines were captured by direct search and electric vacuum cleaner search in and outside the building.Then,age structure of the captured Triatoma maculata(T.maculata) were identified and recorded.Reptiles living in sympatric with the triatomines were also searched.Results:T.maculata were found living sympatric with geckos(Thecadactylus rapicauda) and they bit residents of the apartment building in study.A total of 1 448 individuals of T.maculata were captured within three days,of which 74.2%(1 074 eggs) were eggs,21.5%were nymphs at different stages,and 4.3%were adults.Conclusions:The association of T.maculata and T.rapicauda is an effective strategy of colonizing dwellings located in the vicinity of the habitat where both species are present;and therefore,could have implications of high importance in the intradomiciliary transmission of Chagas disease.

母猪日粮中不同的脂肪酸组成对其断奶仔猪脂肪代谢和脂肪酸组成的影响

试验旨在研究母猪日粮中添加不同来源脂类(35g.kg-1猪油或葵花籽油)对其所产仔猪(断奶和断奶后1周,即第28天和35天仔猪)组织中脂肪酸(FA)组成的影响。试验在母猪(n=20)妊娠第35天～哺乳期进行。母猪日粮中添加猪油(L处理组)可增加初乳和常乳中的C18:1n-9含量,但C18:2n-6含量下降(P<0.01)。L处理组母猪初乳中C16:0和C18:1n-7含量极显著高于葵花籽油处理组(SFO)(P<0.01)。在仔猪断奶后第1周,其肌内脂肪含量具有时间效果(P<0.012)。母猪日粮中添加不同脂肪可显著影响其子代皮下脂肪(C14:0、C16:1n-7、C17:1、C18:0、C18:1n-9、C18:1n-7、C18:2n-6、C20:1n-9和C20:3n-9)(P<0.05)。仔猪肌肉内单不饱和脂肪酸FA的含量随时间显著变化(P<0.001)。此外,母猪日粮和仔猪的采样时间之间存在相互作用,SFO处理组仔猪肌内FA含量的下降较L处理组显著。SFO处理组仔猪的L3HOAD(EC1.1.135)活性极显著高于L处理组(P<0.001)。妊娠和哺乳母猪多不饱和脂肪酸的摄入可以增加断奶仔猪FA的β-氧化,并有助于断奶仔猪体内存储脂肪的动员。