They should be proven compatible with their mates, have a high production rate of fertile eggs, and should be disturbed as little as possible during the mating season. The breeding chickens the eggs come from should be well-developed, mature, and healthy. All of the eggs to be hatched should be taken from the same source to prevent the spread of diseases among the eggs and baby chickens. The best options are either a chicken hatchery or a poultry farm. Therefore another source of fertile eggs must be found. Where to Get Fertile Chicken EggsĮggs found in a grocery store are generally not fertile. From choosing where to purchase the eggs to selecting the best eggs, there are many aspects to consider to ensure the best possible chickens are hatched. When raising chickens from eggs, perhaps the most important factor to consider is choosing the best eggs for hatching. Raising chickens is an increasingly popular hobby as more people are looking for ways to get eggs and chicken meat that are healthy and hormone-free. The Best Chickens for Egg Production Selecting Superior Eggs to Get the Best Chicks.Selecting Superior Eggs to Get the Best Chicks.A study of the pathogenesis of egg drop syndrome in laying hens. Overview of Egg Drop Syndrome 76 in Poultry. Overview of Egg Drop Syndrome '76 in Poultry. Antibodies to egg‐drop syndrome 76 virus in wild birds in possible conjunction with egg‐shell problems. Some preventative measures include washing and disinfecting plastic egg trays before use and separating chickens from other birds. There is no treatment for EDS '76, but preventative measures can be set in place to limit the chance of spreading the virus. Shell-less, soft-shelled, and thin-shelled eggs are all characteristics that point to EDS ridged and misshapen eggs are not. Similar diagnosis diseases of the EDS virus include failure to achieve adequate egg production levels or if there is a decrease in egg production in seemingly healthy birds. Once of the easiest alternative methods is to feed affected eggs to antibody-free hens. It is important to select recently infected birds for testing, but these can be difficult to identify. PCR-based tests and antigen capture ELISA tests have been used to detect EDSV DNA and antigens. In addition, a hemagglutination-inhibition test using fowl RBCs, and ELISA, are the primary serologic tests of choice. Searching for evidence of seroconversion is the easiest diagnostic approach for nonvaccinated flocks. With endemic or sporadic EDS '76, the disease can develop in laying hens of any age.Ĭonfirmatory laboratory testing is needed for definitive diagnosis. Poor eggshell quality at peak production in healthy hens should also raise strong concerns for EDS '76. Ridged eggs and poor internal quality are not features of EDS '76. Transient mild depression and/or mild watery droppings may be seen. Production of pale thin-shelled and shell-less eggs by a flock that appears otherwise healthy suggests that EDS '76 is present. Birds with antibodies slow the spread of the virus throughout the flock. In flocks in which there has been some spread of virus and antibodies are present, the condition is seen as a failure to achieve predicted production targets. Birds tend to eat the thin-shelled and shell-less eggs. The first sign of the disease is the production of pale-shelled eggs, followed by the production of soft-shelled and shell-less eggs. The third pattern is sporadic and due to spread of EDS virus due to contact with domestic or wild ducks or geese or the use of a water supply contaminated with wildfowl droppings. It is usually seen in commercial egg layers. The second pattern is seen through endemic EDS, which is the result of horizontal infection of the flock during lay. Then, the virus multiply and are excreted in the eggs and fecal matter. The chicks that hatch are contaminated with the virus which remains latent until the birds reach sexual maturity. The first pattern with EDS ‘76 occurs when primary breeding stock are infected, and the virus is transmitted vertically through the egg. There are three patterns of viral transmission recognized in chickens. All ages and breeds of chickens are susceptible to infection. OccurrenceĮDS ‘76 has been recently reported in the US and in many other countries such as Ireland, England, and Brazil. Infection rate is lost after treatment with 0.5% formaldehyde or 0.5% glutaraldehyde. The EDSV is resistant to pH range 3–10 and to heating for 3 hours at 56☌ (approx.132.8☏). EDS is caused by a double-stranded DNA virus called the egg drop syndrome virus (EDSV) or duck adenovirus 1.
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