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August 27, 2013

TICKS

Engorged nymph deer ticks

Insects seem to be a perennial favorite of my blogs including ticks so how could I resist posting on these disgusting examples?! Rhonda is responsible for bringing these guys to work, but in case you are wondering…… she picked them off her dog and put them in a Zip Lock bag. We could see dozens of them inside the bag and when examined under a digital microscope, we could see them ¬†all crawling around.

You can see quite clearly how engorged the two ticks on the right have become after a good feeding on dog’s blood. The other one, below has not yet started its blood meal so it has yet to engorge itself.

Nymph deer tick - unengorged

Ticks have only one blood meal each year, but they take their time when they do or, at least, the females do. These are nymph ticks. In their nymph state both males and females have a good blood meal. Next year, only the females have a really big blood meal. Most of the adult males eat sparingly, which is why it is important to know the difference between male and female ticks. Female ticks spend more time eating and so have more time to transmit the bacterium. ¬†Females typically have reddish orange coloring. Males have minimal if any coloring beyond black. However, I don’t think we will be adding this lot to our collection of insects in the office. Black widow spiders and rhino beetles are worth keeping, but ticks….I think not! The ticks were viewed under our new Explorer Digital Microscopes which we will launch soon.