Journal of Parasitology Research / 2018 / Article / Tab 2

Research Article

Morphological Characterization of Emerging Cercariae among Lymnaeid Snails from Barangay Cawongan, Padre Garcia, Batangas, Philippines

Table 2

Number of infected snails in the different months of collection and after different light exposure periods as monitored by cercarial shedding.

Number of snails collectedNumber of Infected snailsOdds Ratio (95 CI)

Total Number750267 (35.6)

Month of Collection
 November 201615045 (30.0%)-
 December 201615032 (21.3%)0.63 (0.38 – 1.07)
 January 201715065 (43.3%)1.78 (1.11 – 2.87)
 February 201715086 (57.3%)3.14 (1.95 – 5.05)
 March 201715039 (26.0%)0.82 (0.50 – 1.36)

Number of Light Exposures
 One15044 (29.3%)-
 Two15055 (36.7%)1.40 (0.86 – 2.26)
 Three15055 (36.7%)1.40 (0.86 – 2.26)
 Four15056 (37.3%)1.44 (0.89 – 2.33)
 Five15057 (38.0%)1.48 (0.91 – 2.39)

Each exposure group was composed of a total of 150 snails from 5 months of collection (n=30 snails/exposure/month).
Number of light exposures represents the number of times a given batch of snails received a 6-hour light exposure with an average ~1000 lux light intensity. There were no significant differences among the numbers of infected snails in the different treatment groups (p>0.05)
Values with the same letter are not significantly different from each other (p>0.05). Values with different letters are significantly different from each other (p<0.001).

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