Is this the movie... (Potential Spoilers)

I remember seeing it one Saturday afternoon, probably about 20 years ago. I remember a field getting covered in a yellow poison that kills all of the ants, and some people too. The ants made a nest out of a person (I remember a closeup of an ant crawling out of a hole in someone's hand).

It also showed a closeup of a chain of ants who were carrying a piece of the yellow poison to the queen. An ant would carry it until it was overcome by the poison an die, then the next ant would pick it up. Eventually the poison made it to the queen, who ate the poison and started laying yellow eggs that were immune to the poison.

There were two scientists who had a laboratory, and they find a girl still alive in the posioned area (She pops up out of a basement outside and promptly faints.

One of the scientists gets an ant bite, and that single ant bite effects him badly. I remember a scene where he has trouble getting his shoes on. He walks outside and falls into a hole, and millions of ants crawl out and cover him up instantly.

Is this that movie?