I found three records that might be of interest to you.
Sanilac County Book of Births Book 1 - page 64 Record # 343
Date:20 Sep 1869 Name:John Oconor Sex:Male Birth-place:Worth Parents:John Oconor & Mary A Oconor Birth-place of Parents:Ireland & Canada Occupation of Father:Farmer Date of Record:21 May 1870
Sanilac County Book of Deaths Book 1 - page 20 Record # 67
Date:15 Apr 1871 Name:John O'Conner Sex:Male Marital Status:Single Age:1 yr, 7 mo Place of Death:Worth Cause of Death:Infl of Bowels Birth-place:Michigan Occupation:(blank) Parents:John O'Conner & Mary Ann O'Conner Residence of Parents:Michigan Date of Record:1 Jun 1872
Sanilac County Book of Deaths Book 1 - page 33 Record # 90
Date of Death:11 Dec 1873 Name:John O'Conner Sex:male Marital Status:married Age:38 yr Place of Death:Worth Cause of Death:Not ascertained Birth-place:Ireland Occupation:Farmer Parents:James O'Conner & Anastacy O'Conner Residence of Parents:Ontario Date of Record:1 Jun 1874
BTW, Worth Twp is the next township south of Lexington Twp.