Volume 16, Number 9—September 2010
Research
Cercarial Dermatitis Transmitted by Exotic Marine Snail
Sara V. Brant
, Andrew N. Cohen, David James, Lucia Hui, Albert Hom, and Eric S. Loker
, Andrew N. Cohen, David James, Lucia Hui, Albert Hom, and Eric S. LokerTable 2
Characteristics of selected schistosome cercariae from 5 locations, United States*
| Characteristic |
Schistosome |
|||||
|---|---|---|---|---|---|---|
| Species | Unidentified | Gigantobilharzia huttoni | G. huronensis | Austrobilharzia variglandis | A. variglandis | A. variglandis |
| Number | 14 | 30 | 50 | ? | 10 | 232 |
| Fixative | Alcohol | Formalin | Formalin | Bouin solution or hot corrosive sublimate fluid | Formalin | Formalin |
| Host species | Haminoea japonica | H. antillarum guadalupensis | Physa gyrina | Ilyanassa obsoleta | I. obsoleta | I. obsoleta |
| Collection location | San Francisco Bay, CA | Virginia Key, Miami, FL | Ann Arbor, MI | Quamquissett Harbor, MA | Rhode Island | San Francisco Bay, CA |
| Body length | 188 ± 4.8 (160–216) | 152 ± 1.4 (135–164) | 240 (195–270) | 262 | 237 (220–250) | 258 (241–275) |
| Body width | 58 ± 1.3 (50–64) | 35 ± 0.7 (48–64) | 72.5 (63.7–105) | 77 | 72.5 (69.0–79.0) | – |
| Tail stem length | 175 ± 3.3 (155–197) | 154 ± 1.2 (140–166) | 268.5 (255–300) | 157 | 228 (200–236) | 286 (264–315) |
| Tail stem width | 24 ± 0.7 (21–29) | 19 ± 0.3 (16–22) | 30 (22.5–45) | – | 22–36 | – |
| Furca length | 78 ± 2.6 (60–92) | 79 ± 0.8 (72–86) | 146.8 (102.5–172.5) | 105 | 126 (120–140) | 190 (161–216) |
| Furca width | 13 ± 0.6 (10–16) | 10 ± 0.4 (6–13) | 15 | – | 12.0–16.5 | – |
| Oral sucker length | 57 ± 1.9 (49–70) | 63 ± 0.6 (54–70) | – | – | 72 (66–85) | – |
| Oral sucker width | 46 ± 0.7 (43–51) | 53 ± 0.7 (48–64) | – | – | 43 (40–45) | – |
| Ventral sucker to posterior end | 54 ± 3.3 (35–76) | 44 ± 0.1 (35–51) | – | – | – | – |
| Body length:tail stem length | 1.1 | 0.99 | 0.89 | 1.7 | 1 | 0.9 |
| Tail stem length:furca length | 2.2 | 1.9 | 1.8 | 1.5 | 1.8 | 1.5 |
| Pairs of flame cells† | 4 + 1 | 4 + 1 | 4 + 1 | 5 + 1 | 5 + 1 | – |
| Pairs of penetration glands | 3 | 5–6 | 5 | 6 | 6 | – |
| Reference | This report | (24,29) | (30) | (31) | (14) | (1) |
*Values are mean ± SE in microns (range), or range only, unless otherwise indicated. For Miller and Northup (31), the tail stem and furca lengths were estimated values based on information in the text. For Grodhaus and Keh (1), the ranges were mean values for 7 lots of cercariae obtained from 7 snails.
†No. pairs in body plus no. pairs in tail.
