Nield v. Pocatello Health Services, Inc.

Summary

The Idaho Supreme Court reviewed a summary judgment dismissing Judy Nield's negligence action against Pocatello Health Services, Inc., concerning MRSA and pseudomonas infections allegedly contracted at a rehabilitation facility. The court held that the district court improperly used a differential-diagnosis analysis to assess the admissibility of Nield's expert affidavit by requiring the expert to negate alternative sources identified by the opposing expert. The judgment was vacated and the case was remanded for further proceedings.

Holdings

1. The district court erred by excluding Dr. Selznick's affidavit because it did not eliminate every possible alternative source of Nield's infections. Where the diagnosis is undisputed and the expert states to a reasonable degree of medical certainty that the defendant's conduct was the probable source, the court may not require the expert to rule out alternatives proposed solely by an opposing expert as a condition of admissibility.
2. The district court erred by relying on objected-to portions of Dr. Coffman's affidavit without first deciding whether those portions were admissible.
3. An expert's opinion must be evaluated on its own merits under Rule 702; it need not respond to or satisfy every assertion made by an opposing expert.
4. Expert testimony may establish that an infection is communicable and identify potential sources, but expert testimony is not necessarily required to establish the factual details of how a particular person contracted the disease.

Questions Presented

1. Whether the district court erred by using a differential-diagnosis analysis to determine the admissibility of Nield's expert affidavit.
2. Whether the district court erred by relying on Dr. Coffman's affidavit without first ruling on Nield's objections to its speculative portions.
3. Whether the district court erred by using the opposing expert's affidavit as the standard for determining the admissibility of Nield's expert affidavits.
4. Whether the district court improperly excluded the entire affidavits of Nield's experts rather than evaluating the admissibility of particular opinions and evidence.

Disposition

vacated