**4.2 Chemical hazards**

These are subtype of occupational hazards resulting from exposure to harmful and dangerous chemical compounds. Chemicals in the form of solids, liquids, gases, fumes, dusts, mists and vapour could have toxic effects on workers if inhaled through breathing, direct contact with the skin (absorption), or ingested by eating or drinking [5]. Hazardous chemicals include neurotoxins, immune agents, dermatologic toxins, systemic toxins, pneumoconiotic agents, and sensitizers.

#### **4.3 Biological hazards**

These are hazards in the workplace caused by biological agents such as microorganisms and toxins produced by living organisms [26]. They exist in exposure to bacteria, virus, fungi and other living organisms. Fisheries and other occupations

**Figure 4.** *Red eye injury. Source: www.letsgohealthy.blogspot.com cited in Olaoye et al. [26].*

**Figure 5.** *Hand and leg burn. Source: www.besthealthybodycare.com cited in Olaoye et al. [26].*

that expose workers to plants and animals or their products are prone to biological hazards. Examples of biological hazards include bites and stings from snakes, insects, scorpions and spiders.
