Blackleg is an endogenous acute infection that principally affects cattle. Blackleg is generally fatal bacterial diseases of young cattle or sheep of any age. The disease is caused by Clostridium chauvoei, an anaerobic spore forming bacterium seen as an acute, localized inflammation of muscle tissue due to growth of the blackleg organisms. This followed by generalized toxemia or poisoning of the animal causing rapid death. The disease is widely distributed in the world. Blackleg can occur at any time of the year; more loss of cattle is seen during warm months of the year. Blackleg has been found in cattle as young as two-month-old, most loss occur in cattle, the best conditioned animals, where there is an abundance of feed.
It is prevented by vaccination when out breaks occur; in early stage of the disease it is treated by antibiotic mostly penicillin is effective treatment to the disease. Control of this disease is based on stringent husbandry measures and scheduled vaccination plan. In recent years, the major virulence factors of C. chauvoei have been discovered and described. However, the pathogenesis of blackleg in cattle and, circulation of the pathogen from point of entry to target tissues is yet not fully elucidated. Therefore, the objectives of this paper are to summarizes the latest review of literature that significantly contributed for understanding the disease in cattle and provides a foundation to preventive strategies.
Blackleg has been recognized as a livestock disease since before medieval times, and today we often use the term loosely to describe several diseases caused by organisms in the Clostridium class of bacteria. However, there are more than 60 different types of Clostridium bacteria, and not all cause disease. What we commonly call blackleg is a highly fatal infection caused by Clostridium chauvoei, resulting in a gas gangrene in the muscle of young cattle, usually occurring between 4 months and 2 years of age. Blackleg seldom affects cattle older than 2 years of age, most likely due to immunity induced by vaccines or natural exposure. However, sporadic cases do occur in cattle older than 2 years and are often associated with the reuse of needles for multiple injections. Blackleg can also be a problem in cattle less than 4 months old that do not receive adequate passive immunity through colostrum. Some of the other clostridial diseases are not as restricted to younger animals as is seen with blackleg.
Dosage & Administration
The vaccine should be administered by subcutaneous injection in the lateral side of the upper neck observing aseptic precautions.
Cattle and sheep: 2 ml/dose.
- Two injections separated by an interval of 3-4 weeks to animals from 3 months of age onwards.
- Immunisation to be completed 2-3 weeks before the period of risk.
- Revaccination with a single booster injection 2-3 weeks before the period of risk.
- The interval for booster injections should be no more than 12 months.
- Two injections should be given, preferably separated by an interval of at least 6 weeks, with the second vaccination being given 3-4 weeks before lambing.
- ubsequent pregnancies: a single booster injection 3-4 weeks before lambing.
- Ewes can be vaccinated during late pregnancy.
- Lambs may be vaccinated from 3 weeks of age onwards: two injections with an interval of 3-4 weeks to be completed 2-3 weeks before the period of risk.
Prices of Black Leg Injection For Cattle
$25.49 – $80.49