background:class ii transactivator (ciita) is a dominanttranscriptional element, controlling numerous genes in theimmune system. ciita is expressed in a constitutive pattern inantigen presenting cells although its expression can occur inother cell types. since the revelation of ciita, there have beenconsiderable advances toward understanding its role as anactivator of mhc ii genes in humans and...

Yunnan is situated in the Southwest China and encompasses regions having high biodiversity, including habitats for several ancestral species of domestic animals such as chicken. Domestic chickens in Yunnan were kept by peoples of varied ethnic and economic backgrounds living in highly varied geographic environments. To identify the genetic background of Yunnan domestic chickens and their relati...

STRATEGIES FOR THE IMPROVEMENT OF RURAL CHICKEN PRODUCTION IN GHANA. Rural poultry production systems in Ghana and in Africa as a whole are based on the scavenging indigenous domestic fowl (Gallus domesticus), the predominant species in the poultry sector [1]. In most African countries scavenging chicken have no regular health control programmes, may or may not have shelter and usually have to ...

The Nigerian indigenous chickens play major roles not only in rural economics but also contribute substantially to the gross national product [1]. They have remained predominantly in villages because of their inherent advantages over the exotic breed. Most of the birds are kept in small flocks under a scavenging system and the feed resources for the birds are household refuse, homestead picking...