When egg production declines and misshapen eggs increase, 90% of poultry farmers first think it is a “viral disease,” but the truth may astonish you—the culprit turns out to be the “insemination procedure” you perform every day and a common intestinal bacterium.
 
　　Basic Information
 
　　Breed: Brown-feathered layer breeders
 
　　Age: 295 days old
 
　　Stock: 12000 sets
 
　　Disease duration: 7 consecutive days
 
　　1, egg production rate fell from 91% to 85%, declining slowly;
 
　　2., sandpaper-shelled eggs, soft-shelled eggs, blood-spotted eggs, and deformed eggs increased significantly; the hatching egg qualification rate declined;
 
　　3, the fertilization rate decreased from 93% to 88%; the hatchability rate began to decline;
 
　　4, the flock’s overall demeanor, feed intake, and droppings were basically normal; the mortality and culling rate was <0.1%.
 
　　Analysis and diagnosis
 
　　1, the uterine section of the oviduct was severely edematous and congested, with thickened mucosa that detached easily;
 
　　2, yellowish-white purulent secretions are present in the ampulla of the fallopian tube, with caseous material in a few cases;
 
　　3, ovarian follicle development is basically normal, with no obvious necrosis;
 
　　4, no obvious lesions are found in the trachea or lungs, ruling out typical Newcastle disease and influenza
 
　　Cause
 
Suspected: bacterial salpingitis (primarily Escherichia coli, secondary to insemination stress)
 
Treatment principles
 
Morning: Compound Amoxicillin A 250 jin/100 kg; administer in drinking water for 3 hours;
 
Afternoon: Y Mother Biochemical Compound 600 jin/500 ml; administer in drinking water for 4 hours; use continuously for 5 days;
 
　　At the same time, mix cod liver oil into the feed, 500 jin of feed/100g, for 7 days to repair eggshell quality.

　　On day 4 of medication: soft-shelled eggs and blood-spotted eggs decreased significantly
 
　　Day 7: the egg production rate rebounded to 89%, and the hatching egg qualification rate returned to normal
 
　　Day 10: the fertilization rate returned to above 92%, and the hatchability rate also rebounded; overall prognosis was good, with no sequelae.
 
　　Key to treatment
 
　　1, breeder hen salpingitis is mostly caused by insemination stress + E. coli, not viruses.
 
　　2, key to treatment: antibacterial (Escherichia coli and other anaerobic bacteria), mucosal repair.
 
　　3, once fallopian tube atrophy or permanent damage occurs, the animal can only be culled; recovery is not possible.