Complex sentence: Barnes and Ellis serologically compared 17 geographically distinct strains of "L. garvieae" isolated from diseased rainbow trout, finding that sera raised against capsule deficient isolates did not agglutinate capsulated isolates, whereas all antisera against capsulated strains cross reacted with non-capsulated isolates.
Split into simpler sentences: Barnes and Ellis serologically compared 17 geographically distinct strains of "L. garvieae" isolated from diseased rainbow trout. They found that sera raised against capsule deficient isolates did not agglutinate capsulated isolates, whereas all antisera against capsulated strains cross reacted with non-capsulated isolates.