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Discussion in 'Managing Your Flock' started by eenie114, Aug 21, 2010.
Is there a difference between eggbound and internal laying? I can't figur it out..
Egg bound means an egg is actually stuck, sometimes too large to be pushed out. Internal laying is different, egg yolk/infection/gunk builds in the oviducts or is deposited in the abdomen. Some terms are used interchangeably because the conditions are similar and the result is the same, basically.
Here is a link from the Merck Manual that has links to the terms and what they mean.
In these hens, partially or fully formed eggs are found in the abdominal cavity. Such eggs reach the cavity by reverse peristalsis of the oviduct. If they have no shell, they are often misshapen due to partial or complete absorption of the contents. Frequently, only empty shell membranes are present. No control or treatment is known. This condition is related to erratic ovulation and defective eggs (see Defective or Abnormal Eggs).
These hens ovulate normally, but the yolk is dropped into the abdominal cavity rather than being collected by the oviduct because of obstruction of the oviduct....
A fully formed egg may lodge in the shell gland or vagina because the egg is too big (eg, double-yolked) or because of hypocalcemia, calcium tetany, or previous trauma (pecking) to the vent and/or vagina. This condition may be more prevalent in pullets that are brought into production before body development is adequate or in hens that are extremely obese. It occurs more often during spring and summer months due to overstimulation of birds by increasing light intensity and day length. This is a medical emergency in pet birds but is usually recognized only at necropsy in poultry. When impaction occurs, eggs that continue to form create layers of albumen and yolk material, and the oviduct becomes very large. Some eggs are refluxed to the abdominal cavity, and affected hens assume a penguin-like posture.
Salpingitis is an inflammation of the oviduct, which may contain liquid or caseous exudate. In young pullets, it is often due to Mycoplasma gallisepticum , E coli , Salmonella spp , or Pasteurella multocida (fowl cholera) infection and can result in reduced egg production. It is a frequent lesion in female broilers and ducks at processing. On gross examination, salpingitis may be difficult to differentiate from impacted oviduct in adults. As the oviduct becomes nonfunctional, the ovaries are usually atrophied. Unless associated with an infectious problem, this condition tends to be found sporadically during necropsy of cull hens.
Salpingitis can be caused by an ecoli infection. Loose cloaca allows feces to be sucked back into the oviduct and cause infection, which is ecoli.