Coliforms Associated With Sugarcane Plants and Juices

Abstract

Rouge), AND ARTHUR R. COLMER. Coliforms associated with sugarcane plants and juices. Appl. Microbiol. 12: 173-177. 1964.-A study of the coliforms found on sugarcane plants throughout the growing season indicated that members of the genus Aerobacter comprise a part of the epiphytic microflora. When quantitative determinations were made of the coliforms by means of the most l)robable number technique, no completed tests were obtained on young sugarcane plants during the test p)eriod of February through MAIay; however, Paracolobactrumn aerogenoides was isolated frequently. Nine different IMViC types of coliforms were identified among the 198 isolates chosen for study. The predominating coliform found at the tol), middle, and bottom portions of the sugarcane plants was A. cloacae, but the tyl)e predominating in leaf-sheath water was A. aerogenes. Only once was Escherichia coli found associated with the plants at the high dilutions necessary for determining most probable numbers. The numbers of different coliforms occurring in sugarcane juice were generally divided equally among A. aerogenes, A. cloacae, and E. coli. MIore variety among the 1:A\IViC types seemed to occur on the cane l)lants than in the leaf-sheath water or the cane juice in the mill.

Coliforms from hides and meat

“…In all, 117 coliforms other than E. coli were (4). In addition, E. cloacae and possibly Citrobacter appear to be part of the normal flora associated with vegetation (2,8). The results indicate that approximately half of the coliforms isolated from the confirmed tests on the hides and meat may be of nonfecal origin.…”

Distribution of ice nucleation-active bacteria on plants in nature

“…Although P. syringae is pathogenic to many plants, it has been found as a resident on a number of apparently healthy plants, including both known hosts and plants not known to be hosts. Erwinia herbicola has been found on many plants, such as vegetables (4, 19); a number of grasses, including perennial rye grass, sugarcane, barley, rye, oats, and wheat (10,14,20,22,23,28,29,46); seeds of rice, wheat, oats, rye, clover, and timothy (13, 24, 39, 45, 46; H. Chcanowska, Rev. Appl.…”

The shelf life of standardized sugarcane juice stored under refrigeration

“…The raw material naturally contains a high microbial population in their stems, roots and leaves, which is widely variable (Kitoko et al, 2004). The colonies of bacteria and molds and yeasts in the stems may range from 1 to 8 logCFU g -1 and 1 to 3 logCFU g -1 , respectively (Duncan & Colmer, 1964). Therefore the counts in this study achieved acceptable levels.…”