Which are the spore bearing organism with their pathogenic effect?

Spores are reproductive cells capable of developing into a new individual without fusion with another reproductive cell. They are produced by bacteria, fungi, algae, and plants. Bacterial spores serve largely as a resting or dormant stage in the bacterial life cycle, helping to preserve the bacterium through periods of unfavorable conditions. Spore production is particularly common among Bacillus and Clostridium bacteria, several species of which are disease-causing.

Sporozoans are pathogens that infect animals and are capable of producing spores. Many sporozoans can alternate between sexual and asexual reproduction in their life cycles.