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Long-term spatiotemporal stability and dynamic changes in the haemoparasite community of spiny mice (Acomys dimidiatus) in four montane wadis in the St. Katherine Protectorate, Sinai, Egypt

Alsarraf, Mohammad; Bednarska, Małgorzata; Mohallal, Eman M.E.; Mierzejewska, Ewa J.; Behnke-Borowczyk, Jolanta; Zalat, Samy; Gilbert, Francis; Welc-Falęciak, Renata; Kloch, Agnieszka; Behnke, Jerzy M.; Bajer, Anna

Authors

Mohammad Alsarraf

Małgorzata Bednarska

Eman M.E. Mohallal

Ewa J. Mierzejewska

Jolanta Behnke-Borowczyk

Samy Zalat

Renata Welc-Falęciak

Agnieszka Kloch

Jerzy M. Behnke

Anna Bajer



Abstract

Background: Long-term field studies of parasite communities are rare but provide a powerful insight into the ecological processes shaping host-parasite interactions. The aim of our study was to monitor long-term trends in the haemoparasite communities of spiny mice (Acomys dimidiatus) and to identify the principal factors responsible for changes over a 12 year period.
Methods: To this end we sampled four semi-isolated populations of mice (n= 835) in 2000, 2004, 2008 and 2012 in four dry montane valleys (wadis) located in the Sinai Massif, Egypt.
Results: Overall 76.2 % of spiny mice carried at least one of the five haemoparasite genera (Babesia, Bartonella, Haemobartonella, Hepatozoon, Trypanosoma) recorded in the study. Prevalence of haemoparasites varied significantly between the sites with the highest overall prevalence in Wadi Tlah and the lowest in W. El Arbaein, and this changed significantly with time. In the first two surveys there was little change in prevalence, but by 2008, when the first signs of a deepening drought in the region had become apparent, prevalence began to drift downwards, and by 2012 prevalence had fallen to the lowest values recorded from all four sites over the entire 12-year period. The overall mean species richness was 1.2 ± 0.03, which peaked in 2004 and then dropped by more than 50 % by 2012. Species richness was highest among mice from Wadi Tlah and peaked in age class 2 mice (young adults). Site was the most significant factor affecting the prevalence of individual parasite species, with Trypanosoma acomys and Hepatozoon sp. occurring mainly in two wadis (W. Tlah & W. Gharaba). In four of the five genera recorded in the study we observed a significant drop in prevalence or/and abundance since 2004, the exception being Hepatozoon sp.
Conclusions: During the 12-year-long period of study in the Sinai, we observed dynamic changes and possibly even cycles of prevalence and abundance of infections which differed depending on parasite species. Although the exact reasons cannot be identified at this time, we hypothesize that the effects of a 15-year-long scarcity of rainfall in the local environment and a fall in host densities over the period of study may have been responsible for a drop in transmission rates, possibly by a negative impact on vector survival.

Citation

Alsarraf, M., Bednarska, M., Mohallal, E. M., Mierzejewska, E. J., Behnke-Borowczyk, J., Zalat, S., …Bajer, A. (2016). Long-term spatiotemporal stability and dynamic changes in the haemoparasite community of spiny mice (Acomys dimidiatus) in four montane wadis in the St. Katherine Protectorate, Sinai, Egypt. Parasites and Vectors, 9(195), https://doi.org/10.1186/s13071-016-1471-z

Journal Article Type Article
Acceptance Date Mar 23, 2015
Publication Date Apr 8, 2016
Deposit Date Jun 17, 2016
Publicly Available Date Jun 17, 2016
Journal Parasites & Vectors
Electronic ISSN 1756-3305
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 9
Issue 195
DOI https://doi.org/10.1186/s13071-016-1471-z
Keywords Acomys dimidiatus; Acomys russatus, haemoparasites; Haemobartonella; Bartonella; Hepatozoon Trypanosoma; Babesia; Species-richness; Prevalence; Abundance; Sinai; Drought; Between year variation
Public URL http://eprints.nottingham.ac.uk/id/eprint/34146
Publisher URL http://parasitesandvectors.biomedcentral.com/articles/10.1186/s13071-016-1471-z
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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