This diploma thesis deals with developing dosage form targeted to distant areas of GIT. Created dosage form would allow the transfer of bacteria to the colon which occur naturally there and thus treat patients with recurrent Clostridium dificille infection. Using dipping method gelatin and acid-resistant DRcapsTM capsules were coated with enteric-solvent film and were subsequently evaluated for their effect on the biodegradation of the capsules in a simulated gastrointestinal tract environment. The work assesses, which polymer is the most suitable for the administration of the microbial content, so that it gets as far as possible in the GIT without damage. According to the results, the coated gelatin capsules did not meet the pharmacopoeial requirements for the enteric dosage form. DRcapsTM capsules coated with Eudragit® S and cellacefate were the most resistant to the GIT environment.