Resumo O objetivo deste estudo foi identificar espécies de Cryptosporidium em bovinos e ovinos do Paraná, região sul do Brasil. Amostras de fezes de 458 bovinos e 101 ovinos foram individualmente submetidas à análise molecular por PCR e nested PCR, utilizando-se iniciadores específicos para sequências da unidade ribossomal 18S (rRNA). As amostras positivas foram analisadas pelo polimorfismo de comprimento de fragmento de restrição (RFLP), seguido de sequenciamento genético para confirmação da espécie. A ocorrência de Cryptosporidium foi de 11,27% (63/559). Observou-se maior ocorrência em cordeiros (20,33%). Das 63 amostras positivas, foi possível identificar as espécies em 58 amostras por RFLP e sequenciamento genético. Foram identificadas cinco espécies de Cryptosporidium: Cryptosporidium andersoni, Cryptosporidium bovis, Cryptosporidium ryanae, Cryptosporidium xiaoi e Cryptosporidium parvum. A espécie mais predominantemente encontrada foi C. andersoni (41,38%) e a menos foi C. parvum (10,34%). As espécies mais abundantes de Cryptosporidium, em bezerros leiteiros, foram C. andersoni (11/25) e C. ryanae (6/25). Dos 17 ovinos positivos, nove (52,94%) estavam infectados com C. andersoni. Este achado é o primeiro relato sobre a ocorrência de C. andersoni em ovinos naturalmente infectados no Brasil e a primeira observação de alta ocorrência absoluta desta espécie de Cryptosporidium em ovinos. Paraná 45 10 utilizandose utilizando se S rRNA. rRNA . (rRNA) RFLP, , (RFLP) 1127 11 27 11,27 63/559. 63559 63/559 559 (63/559) Observouse Observou 20,33%. 2033 20,33% 20 33 (20,33%) 6 5 bovis C 41,38% 4138 41 38 (41,38% 10,34%. 1034 10,34% 34 (10,34%) leiteiros 11/25 1125 25 (11/25 6/25. 625 6/25 (6/25) 1 positivos 52,94% 5294 52 94 (52,94% 4 (rRNA (RFLP 112 2 11,2 6355 63/55 55 (63/559 203 20,33 3 (20,33% 41,38 413 (41,38 103 10,34 (10,34% 11/2 (11/2 62 6/2 (6/25 52,94 529 9 (52,94 11, 635 63/5 (63/55 20,3 (20,33 41,3 (41,3 10,3 (10,34 11/ (11/ 6/ (6/2 52,9 (52,9 63/ (63/5 20, (20,3 41, (41, 10, (10,3 (11 (6/ 52, (52, (63/ (20, (41 (10, (1 (6 (52 (63 (20 (4 (10 ( (5 (2
Abstract The aim of this study was to identify Cryptosporidium species found in cattle and sheep in Paraná, southern region of Brazil. Individual fecal samples from 458 bovines and 101 sheep were submitted for molecular analysis by PCR and nested PCR using specific primers for sequences of the 18S ribosomal unit (rRNA). Positive samples were analyzed using restriction fragment length polymorphism (RFLP), followed by genetic sequencing for species confirmation. The occurrence of Cryptosporidium was 11.27% (63/559). The highest occurrence was detected in lambs (12/59, 20.33%). From the 63 positive samples, it was possible to identify the species in 58 of them by RFLP and genetic sequencing. Five species of Cryptosporidium were identified: Cryptosporidium andersoni, Cryptosporidium bovis, Cryptosporidium ryanae, Cryptosporidium xiaoi, and Cryptosporidium parvum. The most prevalent species was C. andersoni (41.38%) and the least predominant was C. parvum (10.34%). The most abundant species of Cryptosporidium in dairy calves were C. andersoni (11/25) and C. ryanae (6/25). Of the 17 positive sheep, nine (52.94%) were infected with C. andersoni. This finding is the first report on the occurrence of C. andersoni in naturally infected sheep in Brazil and the first observation of a high absolute occurrence of this Cryptosporidium species in sheep. Paraná 45 10 S rRNA. rRNA . (rRNA) RFLP, , (RFLP) confirmation 1127 11 27 11.27 63/559. 63559 63/559 559 (63/559) 12/59, 1259 12 59 (12/59 20.33%. 2033 20.33% 20 33 20.33%) 6 5 identified bovis xiaoi C 41.38% 4138 41 38 (41.38% 10.34%. 1034 10.34% 34 (10.34%) 11/25 1125 25 (11/25 6/25. 625 6/25 (6/25) 1 52.94% 5294 52 94 (52.94% 4 (rRNA (RFLP 112 2 11.2 6355 63/55 55 (63/559 12/59 125 (12/5 203 20.33 3 41.38 413 (41.38 103 10.34 (10.34% 11/2 (11/2 62 6/2 (6/25 52.94 529 9 (52.94 11. 635 63/5 (63/55 12/5 (12/ 20.3 41.3 (41.3 10.3 (10.34 11/ (11/ 6/ (6/2 52.9 (52.9 63/ (63/5 12/ (12 20. 41. (41. 10. (10.3 (11 (6/ 52. (52. (63/ (1 (41 (10. (6 (52 (63 ( (4 (10 (5