Ambient conditions during chicken embryogenesis, such as insufficient oxygen or changes in temperature, are expected to cause permanent phenotypic and affect their posthatch performance. Decades of genetic selection for high growth rate resulted with various physiological morphological that can the broiler fitness under environmental stress. To evaluate effect on responses challenge embryonic d...

The effects of temperature and salinity on the embryonation period and hatching success of eggs of Benedenia seriolae were investigated. Temperature strongly influenced embryonation period; eggs first hatched 5 days after laying at 28 degrees C and 16 days after laying at 14 degrees C. The relationship between temperature and embryonation period is described by quadratic regression equations fo...

AIM To investigate the ultrastructural features of the newly hatched larvae of Strongyloides stercoralis in human duodenal mucosa. METHODS Duodenal biopsies from an AIDS patient were studied by transmission electron microscopy to investigate morphology, location, and host-worm relations of newly hatched larvae. RESULTS Newly hatched larvae were found in the Lieberkuhn crypts within the tunn...

Although it is well documented that hatching asynchrony in birds can lead to competitive and developmental hierarchies, potentially greatly affecting growth and survival of nestlings, hatching asynchrony may also precipitate modulations in neuroendocrine development or function. Here we examine sibling variation in adrenocortical function in postnatally developing, asynchronously hatching Ameri...

Newly hatched chicks were dosed orally with a Salmonella typhimurium wild-type strain, an S. enteritidis wild-type strain, and a genetically defined S. enteritidis aroA vaccine candidate, strain CVL30. The S. typhimurium strain, 2391 Nalr, was virulent in newly hatched chicks and caused deaths in 7 of 20 chicks after an oral dose of 10(5) organisms. The S. enteritidis wild-type strain, LA5, cau...

Background: The specific antibody response against Newcastle disease virus (NDV) in the blood serum of chickens hatched from eggs exposed to low dose gamma-radiation was studied. Materials and methods: Two groups of eggs of commercial meat chicken lines were irradiated with the dose of 0.30 Gy 60Co gamma-rays before incubation and on the 19th day of incubation, respectively. The same num...

To determine the relationship between mitochondrial DNA content (mtDNA) as reflected by MitoScore to ploidy and embryo morphokinetics (MK) using time-lapse imaging. Patients undergoing in vitro fertilization (IVF) with preimplantation genetic testing for aneuploidy (PGT-A) from January 2020 February 2021 were studied retrospective review of prospectively collected data. MK parameters including ...

This study was conducted to compare the efficiency of four vitrification methods: straws in goblet, straws in Hasler device, cryloop and cryotop methods on blastocyst viability and the extent of apoptosis using the TUNEL technique in bovine embryos. Blastocysts were produced in vitro by standard procedures. The base medium for vitrification was Syngro holding medium. Embryos were vitrified by t...

________________________________________________________________________________ Abstract Eggs from a meat-type breeder flock at 29 and 35 weeks of age were used in two trials to investigate the effects of in ovo feeding of carbohydrates (CHO) and high incubation temperature (37.5 vs. 38.5 °C (HIT)) during days 16 to 21 of incubation on hatchability traits, chick weight at hatch as an absolute ...