Two recent examples:

Continuous culture of Cryptosporidium parvum using hollow fiber technology: Morada, M. et al.; Int J Parasitol. 2016 Jan;46(1):21-9 [related presentation PDF]
See also: in vitro gut model

Babesia bigemina: Advances in continuous in vitro culture using serum-free medium supplemented with insulin, transferrin, selenite, and putrescine: Rojas-Martinez, C. et al.; Parisitology International 67 (2018) 294-301 [open access]