1. On the secondary hosts , the fungus produces yellowish depressions on the leaves. 2. The type of fish that serves as secondary host varies based on location. 3. The virus circulates between ticks and rodents, with humans being the secondary hosts . 4. Several generations are raised on these secondary hosts , however no galls are formed. 5. Nevertheless, some alternate secondary hosts have been observed for soybean aphids. 6. Definitive hosts become infected by eating secondary hosts which are infected with metacercariae. 7. The telial stage of heteroecious parasitic fungi is spent on the secondary host plant. 8. Dragonflies are affected by three major groups of cercaria in a secondary host , a snail. 9. The most common secondary host in both Asia and North America for soybean aphids is soybean. 10. However, both direct viral cytotoxicity and secondary host immune responses may lead to the eventual pathogenesis.