The allantoic fluids in which the flu vaccine is grown, contain a white crystalline substance called allantoin.    From Wordnik.com.  [Influenza shots? No thank you!] Reference

I am sorry to have to tell you that it is grown in an embryonic chicken or in the allantoic fluids that surround it in the egg.    From Wordnik.com.  [Influenza shots? No thank you!] Reference

Dollo followed up this suggestion, which had in the meantime been strengthened by Hill's discovery of a true allantoic placenta in.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

Cenogenetic processes, on the other hand, include such phenomena as the formation of yolk and the embryonic membranes, the temporary allantoic circulation, the navel, the curved and contracted shape of the embryo, and the like.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

From about 1940 Burnet's main interest in virology was influenza virus. 9 He showed that influenza virus could be isolated from human cases by inoculation of throat washings into the amniotic sac, and a year later that virus isolated in this way could be quickly adapted to grow in the allantoic sac.    From Wordnik.com.  [The Walter and Eliza Hall Institute] Reference

To those who know nothing of the stimulating power of the Aristotelian biological works, Albert's description of the embryos of fish and his accurate distinction of their mode of development from that of birds, by the absence of an allantoic membrane in the one and its presence in the other, must surely be startling.    From Wordnik.com.  [The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield] Reference

Reference Letters.all. b., allantoic bladder (= urinary bladder).    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

Egg allantoic fluids were harvested and stored at − 80°C until use.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Observe the allantoic bladder, the spleen, gall bladder, portal vein, and pancreas.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

Positive nuclear staining was also found in the allantoic epithelia and mesenchyme.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Diagram showing later stage of allantoic development with commencing constriction of the yolk-sac.    From Wordnik.com.  [Illustrations. Fig. 26] Reference

Activity Newcastle disease virus (NDV) chicken embryo allantoic fluid injected calves affected 'sporadic skin leucosis' (SSL).    From Wordnik.com.  [xml's Blinklist.com] Reference

The diverticulum is lined by entoderm and covered by mesoderm, and in the latter are carried the allantoic or umbilical vessels.    From Wordnik.com.  [I. Embryology. 11. Development of the Fetal Membranes and Placenta] Reference

APMV-5 Kunitachi virus is unusual in that it lacks a virion hemagglutinin and does not grow in the allantoic cavity of embryonated chicken eggs.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Interestingly, APMV-5 failed to grow in the allantoic cavity of 9-day-old embryonated chicken eggs, which is contrary to all other APMV serotypes.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

APMV-5 failed to grow in the allantoic cavity of embryonated chicken eggs, in contrast to all hemagglutinating APMVs, which grow in the allantoic cavity.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Non-hemagglutinating highly virulent APMV-1 strains which grow in the allantoic cavity, have been reported from cormorants (also a psittacine bird) in Canada.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

MDCK cells were maintained in Dulbecco's modified Eagle's medium (DMEM) and used to determine virus titers from egg allantoic fluids and mouse lung homogenates by plaque assay.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

The virus failed to grow in the allantoic cavity of 9-day-old embryonated chicken eggs, but was successfully propagated in the amniotic cavity of 8-day-old embryonated chicken eggs.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

It is tempting to suggest that there is a link between these observations: specifically, that the lack of a strong HA in APMV-5 renders the virus unable to bind to receptors present on cells of the allantoic cavity.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

With the formation of the amnion the embryo is, in most animals, entirely separated from the chorion, and is only again united to it when the allantoic mesoderm spreads over and becomes applied to its inner surface.    From Wordnik.com.  [I. Embryology. 11. Development of the Fetal Membranes and Placenta] Reference

Interestingly APMV-5 grew in the amniotic cavity rather than the allantoic cavity of embryonated chicken eggs: the initial report describing the first isolation of APMV-5 had suggested that the virus did grow in the allantoic cavity of chicken eggs.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Supplementation with 10% fresh allantoic fluid, acetyl trypsin (1-5 µg/ml), or α-chymotrypsin (1-5 µg/ml) did not enhance the growth of the virus, indicating the lack of a requirement for external protease for efficient cleavage of the F protein.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Blood is carried to the allantoic sac by the two allantoic or umbilical arteries, which are continuous with the primitive aortæ, and after circulating through the allantoic capillaries, is returned to the primitive heart by the two umbilical veins.    From Wordnik.com.  [I. Embryology. 11. Development of the Fetal Membranes and Placenta] Reference

The growth of virus in each cell type was observed with and without the presence of 10% allantoic fluid, or 1-5 µg/ml of acetyl trypsin (Invitrogen, USA), or 1-5 µg/ml of α-chymotrypsin (Sigma), as potential sources of protease for cleavage of the F protein if necessary.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

In summary, APMV-5 Kunitachi strain differs significantly from all other APMVs in the following ways; (i) having isolated only from budgerigars, (ii) the presence of an HN protein with no HA activity, (iii) the inability to grow in the allantoic cavity of embryonated chicken eggs, (iv) the presence of unusually long.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

—The hind-gut is at first prolonged backward into the body-stalk as the tube of the allantois; but, with the growth and flexure of the tail-end of the embryo, the body-stalk, with its contained allantoic tube, is carried forward to the ventral aspect of the body, and consequently a bend is formed at the junction of the hind-gut and allantois.    From Wordnik.com.  [XI. Splanchnology. 2. The Digestive Apparatus] Reference

26– Diagram showing later stage of allantoic development with commencing constriction of the yolk-sac.    From Wordnik.com.  [I. Embryology. 11. Development of the Fetal Membranes and Placenta] Reference

Whereas the pathogenic potential of APMV-4 to -9 is generally unknown APMV-5 has not been well-characterized but appears to differ from all the other APMV serotypes in two major attributes: (1) the inability to grow in allantoic cavity of embryonated chicken eggs, and, (2) the failure to cause hemagglutination with chicken RBC.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Al. b., allantoic bladder.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference