Sentence: Nine complete segment 1 ( viral loads 1.7 × 10 4 to 5.9 × 10 6 / ml ) and 15 segment 2 ( viral loads 4.1 × 10 3 to 1.3 × 10 6 / ml ) of otarine PBVs from fecal samples serially collected from California sea lions were sequenced. 
 Section: purpose