Datum: 2024-03-20 Verleger: 紫鸽电气 Durchsuche: 1
Ticks has actually a poor effect on milk and you may chicken cattle creation options internationally, toward concomitant chance they represent towards the transmission of some important infectious infection. Colombian cattle breeds are delivered all over other agroecological regions and are exposed to some other environment pressures. Within the humid and you will more comfortable climates such as those on the tropics, tick burden and heat be concerned are important affairs which can sacrifice livestock show. The goal of this study would be to define tick load from inside the four Colombian cattle breeds and you may assess the relationships anywhere between temperatures fret and tick load during the Bos taurus cows below warm requirements. Tick depending was presented inside 1332 cows from Romosinuano (ROMO), Costeno scam Cuernos (CCC), San Martinero (SM) and Blanco Orejinegro (BON) types, found in the Caribbean, Orinoquia and you may Andean regions. Vital signs and you may environmental parameters were delivered to assess a keen flexibility index (AI) and you may a fever moisture index (THI). An enthusiastic AI 75.
Efficiency presented a varying delivery out-of presses on your body out-of folks that varied with regards to the agroecological part. The lowest tick weight is actually found in the fresh ROMO reproduce (twelve.8 ± dos.6), while the higher tick load is seen in CCC (30.8 ± 2.3), which were located in the exact same agroecological part. SM and you can ROMO dogs which have an enthusiastic AI > dos got a top tick weight than the counterparts that had an enthusiastic AI
Clicks are bloodsucking ectoparasites one real time by feeding on blood of various spouse pets, animals and you can animals kinds. Presses are extremely essential in more comfortable, wetter habitats where they are able to apply to agricultural creation or even properly controlled . Rhipicephalus (Boophilus) microplus are an economically extremely important tick widely delivered on south hemisphere plus in the fresh new south says of the U . s ., and you may will act as a good vector for the transmission of babesiosis and you may anaplasmosis . Rhipicephalus microplus is the tick on the highest bad financial impact on the meats and you can whole milk cattle marketplace away from Central and you can Southern The usa, and you will Australia [3, 4]. When you look at the Colombia, R. microplus could have been reported in lots of departments along side Caribbean, this new Andean therefore the Orinoquia nations .
Monetary losings from inside the plagued cattle are due to skin surface damage, cures will set you back, losses associated with transmission off tick-borne disorder, and direct bad effect on animal productivity [cuatro, 6]. From inside the Bos taurus cows, per engorging feminine tick is in charge of an average death of step 1.37 ± 0.twenty-five grams off lbs for each private, while in B. taurus ? B. indicus crosses, so it well worth has been estimated due to the fact step 1.18 ± 0.21 g/engorging tick. That it fat losings isn’t just considering the blood losings due to ticks, and also due to cravings suppression and you can smaller supply intake, which may account fully for everything 65% of fat anxiety. Also, alterations out-of metabolic variables and you can dysfunctional digestion of the disturbance having regular abomasal outflow used in experimentally infested cows imply that the end result off loss of blood with the efficiency merely teaches you on the twenty-five% of total weight losings .
Weather is one of the most significant points handling tick shipments owed so you’re able to the regulating impact on the fresh tick lives-course . Changes in ecological criteria have a confident or negative impact to the tick burdens and on the new psychological heat regulation mechanisms of infested cows . Multiple indicator have been developed to keep track of the heat be concerned standing in various animals varieties. The warmth-dampness list (THI) brings together the results of sky temperatures and dampness with the amount of thermal stress . Almost every other indices instance Benezra’s coefficient from flexibility (AI) or perhaps the Iberia temperature threshold attempt take into account essential cues inside pet including rectal temperature and you will respiratory price.
