New morphological data on fat bodies of semi-engorged females of Amblyomma cajennense (Acari: Ixodidae)

Micron : the International Research and Review Journal for Microscopy
Sandra Eloisi DenardiMaria Izabel Camargo Mathias

Abstract

The present ultramorphological, histological and ultrastructural study on the fat body of semi-engorged females of Amblyomma cajennense revealed that this tissue is diffuse and consists of strands of cells surrounding the tracheal trunks. Morphometric analysis showed that the cellular and nuclear areas of round-shaped trophocytes are larger than those of cuboidal trophocytes, indicating that the arrangement of the former provides more contact area with the haemolymph. In this species, the fat body is found right underneath the integument and around organs. It consists of two cell types that despite distinct morphological characteristics and locations in the tissue, present the same histological features. In this study, these cells were termed cuboidal trophocytes when arranged as strands of cells and present in larger numbers, and round-shaped trophocytes when lying on these strands and observed in fewer numbers. Histological observations revealed that both types of trophocytes have one nucleus in their cytoplasm and also exhibit numerous vacuoles of different sizes and contents. Ultrastructural examination revealed that the organelles more frequently observed were the vesicular and lamellar rough endoplasmic reticulum, and mit...Continue Reading

References

Sep 1, 1991·Journal of Medical Entomology·J F LevineR T Turner
Jan 1, 1990·Experimental & Applied Acarology·L B CoonsL Starr-Spires
Oct 16, 2004·Veterinary Parasitology·Sandra Eloisi DenardiMaria Izabel Camargo Mathias

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Citations

Jul 8, 2010·Micron : the International Research and Review Journal for Microscopy·Maria Izabel Camargo MathiasGervásio Henrique Bechara
Dec 2, 2008·Experimental Parasitology·Sandra Eloisi DenardiMaria Izabel Camargo-Mathias

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