text: Yo, yo, listen up, I got a story to tell,
  'Bout managing manure, it's a major concern, oh hell,
  In anaerobic systems, antibiotics make 'em frown,
  Messing with the microbes, got the whole place goin' down.
  
  So we set out to study, investigate the scene,
  How oxytetracycline affects the bacteria, if you know what I mean,
  In them cow manure digesters, medicated or not,
  We analyzed the data, gave it everything we got.
  
  Using UV-HPLC and LC/MS/MS,
  We measured OTC and its metabolites, no time to rest,
  Then we looked at the microbes, wanted to see,
  If the community structures were affected, how it'd be.
  
  FISH, DGGE, cloning, sequencing too,
  We used all the tools to see what they'd do,
  And what we found was clear, no room for debate,
  Operating conditions play a big role, yo, they dictate.
  
  The dynamics of the microbes, the biogas production,
  And how OTC and its metabolites get reduction,
  With an average concentration of 2.2 mg/L,
  Operating conditions were like a magic spell.
  
  But here's the deal, it hit the acetoclastic crew,
  More than the hydrogenotrophic and bacteria too,
  Operating conditions had 'em feeling the heat,
  While the others were chillin', dancin' to the beat.
  
  So there you have it, the rap version of the study,
  Microbes, manure, antibiotics, it's all quite muddy,
  But now you know, how it all goes down,
  In the world of anaerobic digestion, we run this town.