Term of Award


Degree Name

Master of Science in Biology

Document Type and Release Option

Thesis (restricted to Georgia Southern)


Department of Biology

Committee Chair

James H. Oliver, Jr.

Committee Member 1

Daniel Hagan

Committee Member 2

Sara N. Bennett


Histological techniques and paraldehyde-fuchsin (PAF staining) were used to study the synganglion and to locate neurosecretory regions and neurosecretion within the synganglion of the chicken mite, Dermanyssus gallinae. The synganglion, which is formed internally by neuropilar ganglia, gives rise to a single esophageal and paired cheliceral, palpal, pedal (I-IV), and opisthosomal nerves. These nerves are interconnected by commissures and connectives within the synganglion. Twelve neurosecretory regions (PAF-positive) are present in the unfed protonymph, unfed deutonymph, virgin male and female, and the mated male. There are 11 PAF-positive neurosecretory regions in the larva, and 24, 48 and 72 hour post-fed deutonymph and mated females. Neurosecretory regions in all developmental stadia are described in relation to their positions adjacent to individual neuropilar ganglia.


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