Category: Y

A popular term to describe a dietary practice resulting in alternating cycles of losing and regaining weight.  

An artificially produced isotope of the element Yttrium. The isotope is radioactive and emits beta rays which are utilized for the treatment of tumours.  

A genus of bacteria which includes the causative organism of plague, Yersinia pestis. It also includes Yersinia enterocolitica, an uncommon cause of fever, abdominal pain and bloody diarrhoea in children which may last from 1-3 weeks. Occasionally the child also develops a skin rash and joint pains. Treatment is with antibiotics. Adults with this infection…

A culture done on cells of vaginal/cervical fluid to detect the presence of yeast infection (candidiasis).  

Embryonic membranous tissue that produces the first red blood cell of the embryo. The membranous sac, composed of mesoderm lined with endoderm, that lies ventral to the embryo. Its initially wide communication with the future gut is later reduced to a narrow duct passing through the umbilicus. It probably assists in transporting nutrients to the…

A rigid, plastic-tipped device used to aspirate secretions from the mouth and throat. A rigid suction tip used to aspirate secretions from the oropharynx.  

Narrow duct that connects the yolk sac and mid area of the embryonic gut during early development, usually disappearing in early embryonic growth. The duct that connects the embryonic gut to the yolk sac; it disappears during fetal development.  

Membranous sac that develops in the early embryo, providing part of the primitive gut, a site of blood cell formation, and a means for transporting nutrients to the early embryo. In humans it disappears in early embryonic development. In mammals, the embryonic membrane that is the site of formation of the first red blood cells…

Nutritive material, rich in protein and fats, found within the ovum to supply nourishment for the developing embryo. It is nearly absent in the ova of humans and other mammals, in whom the embryo receives nourishment from the mother, through the placenta. A substance, rich in protein and fat, that is laid down within the…

Species infecting many animals, especially rodents, and an epidemic risk in small animal houses. Yersinia pseudotuberculosis is the only motile member of this and the allied genera, and then only at 18 – 26°C; poor but evident growth on MacConkey; urease producer. A species that causes pseudotuberculosis in humans.