H.contortus survives in warm and moist conditions. Transmission periods are usually considered to be between 15-37 ◦C (Van Wyke and Reynecke 2011). The R0 model predicts when climate is going to be suitable for parasite transmission.
Comprised mostly of tropical savannah with a large section of tropical rainforest in in the south and south east. There are also some small temperate regions scattered along the countries border regions. A reflected in the Haemonchus risk graph the key rain in the country is split into two key time frames. Firstly, from March to May and secondly from September to November.
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