Although soil testing labs don't screen for pathogens (they are meant to assess suitability for growing crops or other plants from a nutrition standpoint), you can find a list of regional labs to consider using on our Soil Testing and Soil Testing Labs web page. There are numerous microbes that might become pathogens if the conditions are right (they can't be eradicated from soil and are a natural part of the soil ecosystem), but fortunately minimizing plant stress by giving them the conditions they need (good drainage, good air circulation, and usually a full sun exposure), they will resist infection by most fungi and bacteria.

Beneficial microbes exist in the soil as well (and usually outnumber the pathogens), and not only will they help plants stay healthy, but some can actually out-compete or kill the pathogenic microbes. By periodically adding organic matter (via compost or a biodegradable cover crop or mulch) to the planting bed, avoiding soil compaction, not roto-tilling the soil (which damages soil structure), and avoiding overuse of pesticides or synthetic fertilizers, those actions can support those helpers and let them thrive, further reducing the risk of disease problems.

If you have had issues with certain vegetables in the past (or just want to try something new), our Vegetable care and troubleshooting pages might be of help in determining what went wrong and how best to support vigorous and productive growth for each crop.

Miri