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Prophylactic and therapeutic efficacy of clinoptilolite against Cryptosporidium parvum in experimentally challenged neonatal lambs

Veterinary Parasitology, ISSN: 0304-4017, Vol: 299, Page: 109574
2021
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Article Description

This study was designed to test the prophylactic and therapeutic efficacy of clinoptilolite against Cryptosporidium (C.) parvum infection in lambs. Within the first day of life, three groups of 10 lambs were each inoculated with 1 × 10 6 oocysts of C. parvum. The prophylactic (PROP) group received orally clinoptilolite supplemented at a rate of 3% to the colostrum within the first day of life before inoculation and then to milk replacer for two weeks. The therapeutic (TREA) group was supplemented with the same rate, route and duration of clinoptilolite, starting from the day of the first appearance of oocysts in the faeces. The positive control group (pCON) was left untreated and fed only the basal diet. Disease development and clinoptilolite efficacy were assessed daily by evaluating oocyst per gram of faeces (OPG) counts, faecal consistent score (FCS), and clinical health score (CHS) from day -1 to 20 days post inoculation. A significantly ( p < 0.001) lower OPG value was found in the PROP and TREA groups in comparison to the pCON group. The FCS and CHS were decreased in the PROP ( p < 0.01 and p < 0.001) and TREA ( p < 0.05 and p < 0.001) groups compared to the pCON group, respectively. The percentage efficacy of clinoptilolite was calculated to be 97.4 % in the PROP group and 91.6 % in the TREA group. In conclusion, this study proved for the first time that clinoptilolite has promising prophylactic and therapeutic activities against C. parvum in experimentally infected lambs.

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