Whenever we arrive at this time of year, going through the winter with the corresponding frosts, our animals usually present on the neck area, in the vast majority of the time, hairs or patches of hair that have been lost, either because they have been fallen from scratching or have been cut. Y the most frequently asked question is, “is this louse or scabies?”
Although the type of injury they produce is different, it is often doubted which is which, largely due to the fact that scabies was not diagnosed for a long time and almost disappears due to the massive use of drugs from the Macrocyclic lactone family. (Ivermectin, Doramectin, etc). However, this massive and indiscriminate use (use and abuse) was what led to the current resistance of different families of parasites, mainly gastrointestinal, and also scabies mite (genus Psoroptes and Chorióptes), which has caused two situations. On the one hand, resistance to the drug, and on the other, due to this low effectiveness, to the change of drugs to combat gastrointestinal parasites (which is fine) using active principles that do not have acaricidal action, therefore, dear old mange is back.
Scabies mites produce vesicles that exude serum, forming pustules and crusts on the skin. This causes itching (pruritus), the animal scratches, is uncomfortable, stops eating, loses weight, its animal welfare is compromised and can lead to the death of the animal.
Although the lesions are suggestive of the presence of scabies, ideal for obtaining an accurate diagnosis is to send samples to the laboratory of skin scrapings from the periphery of the lesions, since in the center of them the parasite load is low, for the identification of the mite and its gender.
Regarding the treatmentAlthough cases of low response to injectable drugs (Ivermectins, etc.) have been reported, these are still the choice for scabies control, complying with two applications, 11-12 days apart, to maximize results. attacking the biological cycle of the ectoparasite and avoiding handling errors. Here, great care must be taken with the type of production and drug withdrawal times to avoid residues in milk or meat.
If injectables cannot be given, baths, sprays or pour-on treatments should be used.
In the case of the other bug to be treated, lice, also cause skin lesions, causing irritation and itching, which lead to the animal scratching, losing hair, eating less, being upset, etc. causes wounds and brings secondary infections. There are two versions of these nice little friends, (if the mothers will have to fight with the heads of the boys, and some great ones too). The chewers and the suckers. The chewing louse, precisely, cuts hair, causes irritation, and the other bites the skin to suck blood and tissue fluids, these they can produce pictures of anemia.
Generally, young animals and sick, old or poor adults are the most affected.
Their diagnosis should not be a problem since they are seen, the type of parasite may not be identified, but they can be observed on the animal. Samples should also be sent to the laboratory for correct identification.
The big difference occurs in the treatment, since chewing lice are not reached by injection drugs, since they do not suck blood, then pour-on products or baths should be used, which are effective for both categories and even against scabies.
Also control internal parasites at this time using hpg (eggs per gram) in fecal matter, simple, inexpensive technique, mainly in small categories, weaning, etc., and respecting vaccinations, Clostridials and Carbuncle (yes, carbuncle also kills animals under 2 years of age as well as clostridia kill cows).
Two considerations: On the one hand, the deadline for bleeding in herds of more than 300 cows is over. To carry out the DOES, I hope that SENASA will maintain the deadlines (they go more than 2 years) and enforce the regulations. On the other hand, at one point I named the concept of animal welfare, and I don’t want to let go of the fact that in the last few days a great professional and a Lord with all the letters passed away, doctor Mario Sirven, who propagated, disseminated, taught and defended animal welfare above all else.