Pattern of parasitic infections in anurans from a mangrove community of the Niger Delta, Nigeria

Aisien, M. S. O., Uwagbae, M., Edo-Taiwo, O., Imasuen, A.A. and Ovwah, E.

Keywords: anurans, mangrove, helminth parasites, Niger Delta, Nigeria
Published in Volume 13
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Abstract:

Helminth parasites of anurans from Ijala Ikeren, a mangrove-contiguous community, in the Niger Delta of Nigeria were
investigated. A total of 76 anurans belonging to 4 families, 5 genera and 9 species were examined and they include
Afrixalus dorsalis, A. fulvovittatus, Amietophrynus maculatus, Hyperolius concolor phase B, H. concolor, phase C, H.
fusciventris burtoni, H. guttulatus, Hoplobatrachus occipitalis, Ptychadena bibroni and P. oxyrynchus. A total of 13
helminth parasites were recovered, with an overall prevalence of 56.6%. Prevalence of cestode parasites was 9.21%,
trematodes, 18.42% and nematodes, 28.96%. The cestodes recovered were Baerietta jaegerskioeldi and a larval
proteocephalid; trematodes included Haematoloechus exoterorchis, Mesocoelium cameroonensis and M. monodi, while
the nematodes included Chabaudus leberrei, Cosmocerca ornata, larval Physaloptera, Rhabdias africanus, Rhabdias
sp., two larval ascaridoids (one encysted in the body cavity and the other in the mucosa of stomach) and an unidentified
intestinal nematode. The mean intensity of infection was generally low except for Mesocoelium spp. (M. cameroonensis
and M. monodi) where an over-dispersion was observed. The encysted ascaridoid larvae recovered from the stomach of
Ptychadena oxyrynchus represents a new species and is an addition to the group of nematodes that use anurans as
transport hosts. In conclusion, the mangrove environment at Ijala-Ikeren sustains a low diversity of amphibians which
habour a low number of parasite species, whose low intensity of infection may be attributable to the parasite-hostile
nature of the habitat.