Anthelmintic Efficacy and Safety of a p-Methoxybenzylidene Hydrazone Derivative of Mebendazole in Naturally Infected Domestic Chickens (Gallus gallus domesticus)

In the world of poultry farming, the health of a flock depends heavily on the condition of its digestive system. Chickens are constantly exposed to microscopic parasites that live inside their intestines, feeding on nutrients and damaging the delicate lining of the gut. These internal worms, known as gastrointestinal helminths, are a persistent problem for farmers everywhere. They steal the food meant for egg production and growth, weaken the bird's immune system, and can lead to significant economic losses. For decades, farmers have relied on a class of medicines called benzimidazoles to clear these infections. One of the most common drugs in this group is mebendazole, which works by interfering with the parasite's ability to absorb sugar, effectively starving it to death. However, just as bacteria can learn to resist antibiotics, parasites can eventually become resistant to these drugs, making them less effective over time. This constant battle has pushed scientists to look for new, improved versions of existing medicines that can kill the worms more effectively without harming the chicken.

A team of researchers recently set out to test a new chemical variation of mebendazole, specifically designed to see if it could offer better protection for domestic chickens. They created a new compound by attaching a specific chemical group, called a p-methoxybenzylidene hydrazone, to the original drug molecule. To see if this new version worked, they gathered 270 Rhode Island Red laying hens that were naturally infected with various types of intestinal worms. The birds were divided into three groups. The first group received no treatment at all, serving as a baseline to show what happens when worms are left unchecked. The second group received the standard, well-known mebendazole drug. The third group received the newly synthesized hydrazone derivative. All the birds were given their respective treatments at a dose of 10 milligrams for every 1.5 kilograms of body weight, and the researchers watched closely for three weeks to see how the birds and the parasites responded.

The scientists checked the birds' health in several ways to ensure the new drug was safe. They took blood samples to count the red and white blood cells, platelets, and hemoglobin levels, looking for any signs that the medicine might be causing internal stress or damage. They also analyzed the blood for liver function markers, such as enzymes and bilirubin, which would rise if the liver were struggling to process the drug. The results were reassuring. The birds that received the new hydrazone derivative showed no significant differences in their blood counts or liver function compared to the birds that received the standard drug or the untreated birds. In fact, all the measured health indicators stayed within the normal, healthy range for laying hens. This suggests that the new compound is gentle on the chicken's body and does not cause the kind of toxic side effects that sometimes worry farmers when trying new treatments.

When it came to fighting the parasites, the new drug performed impressively. The researchers counted the number of worm eggs found in the birds' droppings before the treatment and then again after. In the group that received no medicine, the number of eggs remained high, showing that the worms were thriving and reproducing. In contrast, both the group treated with standard mebendazole and the group treated with the new derivative saw a sharp drop in the number of eggs. The birds that received the new hydrazone derivative showed a particularly strong result, with even lower egg counts in the later stages of the study compared to the group receiving the standard drug. To confirm this, the researchers also examined the intestines of the birds after the experiment. They found that the birds treated with the new compound had fewer adult worms inside them than the untreated birds, proving that the medicine was successfully clearing the infection.

Beyond just killing the worms, the study looked at how the birds' bodies recovered. Intestinal parasites often damage the tiny, finger-like projections inside the gut called villi, which are responsible for absorbing nutrients. When these structures are damaged, the bird cannot eat well, even if it has plenty of food. The researchers examined tissue samples from the duodenum, jejunum, and ileum sections of the intestines. They found that the birds treated with the new drug had taller and wider villi compared to the untreated birds, indicating that the intestinal lining was healing and returning to a healthy state. The birds in the new drug group showed the most improvement in the structure of their intestines, suggesting that by clearing the infection more effectively, the new compound allowed the birds' digestive systems to recover faster.

The study concludes that this new p-methoxybenzylidene hydrazone derivative of mebendazole is a promising candidate for treating worm infections in chickens. It appears to be just as safe for the birds as the current standard treatment but may be slightly more effective at reducing the number of parasites and helping the birds' guts heal. The researchers note that while these results are encouraging, more work is needed before the drug can be used on farms. Future studies will need to look at how the drug moves through the bird's body, how long it stays in the system, and whether it works just as well in large, commercial flocks. For now, the findings offer a hopeful step toward a new tool that could help keep poultry healthy and productive without the risk of harming the birds themselves.