Facts:

• Paciencio Bayogbog, the petitioner, sought compensation for contracting pulmonary tuberculosis during his employment with Marinduque Mining & Industrial Corporation, Surigao Nickel Project.
• Bayogbog filed a Notice of Injury or Sickness and Claim for Compensation on March 3, 1975, alleging he contracted "pulmonary tuberculosis, moderately advanced infection" while employed by the respondent.
• The respondent, through its Assistant Vice-President, did not contest the claimant's right to compensation.
• The Acting Referee and Chief of the Workmen's Compensation Unit, Regional Office No. 9, issued an award on October 8, 1975, granting Bayogbog P4,505.34 as disability compensation.
• Both parties received copies of the award on November 5, 1975. No motion for reconsideration or petition for review was filed by the respondent.
• Bayogbog moved for execution, and a writ of execution was issued on February 17, 1976.
• The respondent filed a motion to set aside the award and writ of execution on March 22, 1976, claiming the award was null and void due to lack of jurisdiction.
• The Chairman of the Workmen's Compensation Commission reversed the Referee's award on March 29, 1976.
• Bayogbog was employed as a laborer from September 13, 1968, until his termination on February 1, 1975, due to his illness.
• Dr. Jose P. Bayana, Jr.'s Physician's Report indicated that Bayogbog's illness supervened on November 18, 1974, and was a result of his employment.
• The Workmen's Compensation Act was applicable as the illness occurred during his employment.
• The petitioner presented evidence supporting his claim, while the respondent failed to rebut the presumption or provide contrary evidence.

Issue:

• (Unlock)

Ruling:

1. The Supreme Court ruled that Paciencio Bayogbog's pulmonary tuberculosis is compensable.
2. The Supreme Court set aside the decision of the Workmen's Compensation Com...(Unlock)

Ratio:

• The Supreme Court found that Bayogbog contracted pulmonary tuberculosis during his employment, invoking a disputable presumption of compensability under the Workmen's Compensation Act.
• This presumption relieved Bayogbog of the burden to prove causation, shifting the burden to the employer to disprove the claim.
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