Section 287.067, RSMo 2000, states as follows:
- In this chapter the term "occupational disease" is hereby defined to mean, unless a different meaning is clearly indicated by the context, an identifiable disease arising with or without human fault out of and in the course of the employment. Ordinary diseases of life to which the general public is exposed outside of the employment shall not be compensable, except where the diseases follow as an incident of an occupational disease as defined in this section. The disease need not to have been foreseen or expected but after its contraction it must appear to have had its origin in a risk connected with the employment and to have flowed from that source as a rational consequence.
The employee must prove by substantial and competent evidence that he has contracted an occupational disease and not an ordinary disease of life. Kelley v. Banta \& Stude Const. Co., Inc., 1 S.W.3d 43, 48 (Mo.App. E.D. 1999); Hayes v. Hudson Foods, Inc., 818 S.W.2d 296, 299-300 (Mo.App. S.D. 1991). This involves showing that there was an exposure to the disease which was greater than or different from that which affects the public generally, and that there was a recognizable link between the disease and some distinctive feature of the employee's job which is common to all jobs of that sort. Id.; Dawson v. Associated Elec., 885 S.W.2d 712, 716 (Mo.App. W.D. 1994). The probability that the claimed occupational disease was caused by conditions in the work place is generally established through medical expert testimony. Id.
A claim for benefits is not necessarily defeated by the mere possibility that multiple factors caused or contributed
to the cause of an occupational disease. Sheehan v. Springfield Seed \& Floral, Inc., 733 S.W.2d 795, 797-98 (Mo.App. S.D. 1987). Work conditions need not be the sole cause of the occupational disease, so long as they are a major contributing factor to the disease. Kelley, 1 S.W.3d at 48. A single expert medical opinion will support a finding of compensability even where the causes of the occupational disease are indeterminate. Id.; Dawson, 885 S.W.2d at 716.
After careful review, the Commission does not agree with the finding of the administrative law judge that employee's left carpal tunnel syndrome is not compensable. Employee met his burden by establishing that he contracted an occupational disease, carpal tunnel syndrome, and not an ordinary disease of life. He was able to demonstrate both that his exposure was greater than that which affects the public generally and that his work as a gardener was linked to the contraction of the disease. Additionally, through expert testimony, claimant was able to establish that his work conditions were a major contributing factor to the disease.
Employee was able to establish exposure, as both Dr. Schlafly and Dr. Brown testified that employee's work conditions exposed him to the contraction of carpal tunnel syndrome. Employee's testimony as to the repetitive nature of his duties allowed medical experts to conclude that his work exposed him to greater risk than that which affects the public generally. Dr. Schlafly testified that employee's duties exposed him to the contraction of an occupational disease, specifically carpal tunnel syndrome. Dr. Brown corroborated Dr. Schlafly's testimony by opining that employee's work conditions exposed him to the contraction of the disease.
Employee was also able to establish a link between the work conditions and the disease through competent expert testimony. Dr. Schlafly testified that after reviewing both employee's medical history and records and performing a complete physical examination, that employee's work for employer was a substantial factor in employee's development of left carpal tunnel syndrome.
Furthermore, Dr. Brown conceded that there was a link between employee's work conditions and the disease. On cross-examination, Dr. Brown opined that employee's work as a gardener was a substantial factor in the development of employee's carpal tunnel syndrome.
Employee satisfied his burden through expert testimony provided by Dr. Schlafly and Dr. Brown establishing work place exposure as well as a link between employee's left carpal tunnel syndrome and his employment. The testimony offered by employee as well as medical experts was sufficient in convincing the Commission that his employment was a substantial factor resulting in his left carpal tunnel syndrome. Therefore, the Commission finds that there was exposure in the workplace sufficient to conclude that his alleged repetitive motion was capable of producing his resultant medical condition, left carpal tunnel syndrome.