Seasonal occurrence of Cosmocerca podicipinus (Nematoda: Cosmocercidae) in Pseudopaludicola falcipes (Anura: Leiuperidae) from the agricultural area in Corrientes, Argentina

GONZÁLEZ, C. E. & M. I. HAMANN

Revista Ibero-Latinoamericana de Parasitología

Editorial Iku

Año: 2009 vol. 68 p. 173 - 179

0718-8730

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mso-list-type:hybrid; mso-list-template-ids:1681546146 201981965 201981955 201981957 201981953 201981955 201981957 201981953 201981955 201981957;} @list l2:level1 {mso-level-number-format:bullet; mso-level-text:&amp;amp;amp;#61692;; mso-level-tab-stop:36.0pt; mso-level-number-position:left; text-indent:-18.0pt; font-family:Wingdings;} @list l3 {mso-list-id:1536651635; mso-list-type:hybrid; mso-list-template-ids:-1395875450 201981965 290721862 201981957 201981953 201981955 201981957 201981953 201981955 201981957;} @list l3:level1 {mso-level-number-format:bullet; mso-level-text:&amp;amp;amp;#61692;; mso-level-tab-stop:36.0pt; mso-level-number-position:left; text-indent:-18.0pt; font-family:Wingdings;} @list l3:level2 {mso-level-start-at:4; mso-level-number-format:bullet; mso-level-text:-; mso-level-tab-stop:112.5pt; mso-level-number-position:left; margin-left:112.5pt; text-indent:-58.5pt; font-family:Arial; mso-fareast-font-family:"Times New Roman";} @list l4 {mso-list-id:1603297039; mso-list-type:hybrid; mso-list-template-ids:2110400528 201981953 201981955 201981957 201981953 201981955 201981957 201981953 201981955 201981957;} @list l4:level1 {mso-level-number-format:bullet; mso-level-text:&amp;amp;amp;#61623;; mso-level-tab-stop:36.0pt; mso-level-number-position:left; text-indent:-18.0pt; font-family:Symbol; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";} @list l5 {mso-list-id:2076199073; mso-list-type:hybrid; mso-list-template-ids:1318852484 201981969 201981977 201981979 201981967 201981977 201981979 201981967 201981977 201981979;} @list l5:level1 {mso-level-text:"%1)"; mso-level-tab-stop:36.0pt; mso-level-number-position:left; text-indent:-18.0pt;} ol {margin-bottom:0cm;} ul {margin-bottom:0cm;} --&amp;amp;amp;gt; Three hundred twenty-two adults of Pseudopaludicola falcipes were collected from Corrientes, Argentina, between February 2002 to November 2003, and examined for Cosmocerca podicipinus. The prevalence (26.7%) and mean intensity ± 1 SD (1.34±0.99) of infection were low. There were no significant differences between sexes of amphibians and prevalence, number of nematodes and mean intensity (P > 0.05). In female and male frogs the intensity of infection did not have any significant relationship with either length or with weight (P > 0.05). Prevalences were highest during summer and spring and were low in the periods of dry conditions, whereas, mean intensity did not change appreciably throughout the months. Sex ratios of C. podicipinus were significantly different (P < 0.05) from the expected 1.00:1.00 ratio. The lungs were parasited only by males and the intestine was parasitized by both sexes of nematodes. The present study contributes for the first time data about seasonal occurrence, nematode sex ratios and infections by organs in an environment disturbed by agricultural activity.