Name the pathogen which causes maligant malaria.

Explanation

### Step-by-Step Solution:

1. **Understanding Malignant Malaria**: Malignant malaria is a severe form of malaria that can lead to serious complications, including damage to the brain and central nervous system.

2. **Identifying the Pathogen**: The disease is caused by a type of pathogen known as a protozoan parasite.

3. **Recognizing the Specific Species**: Among the various species of the Plasmodium genus, one species is particularly known for causing malignant malaria.

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