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Scanning electron microscopy of S. mansoni PZQ-resistant strain adult males after exposure to 0.3 μM of PZQ for 3 h. (A–C) Resistant strain adult males upon exposure to PZQ, presenting changes in oral and ventral suckers; (D–F) losses of tubercles and spines. Red arrows indicate alterations. Image marginations: (A) 90x 10 kV ________100u; (B) 250x 10 kV ________100u; (C) 160x 10 kV ________100u; (D) 550x 10 kV ________10u; (E) 600x 10 kV ________10u; (F) 350x 10 kV ________100u.
