Microalgae in Poultry Field: A Comprehensive Perspectives

Many years ago, antibiotics have been added to animals and poultry feed as growth promotor. Hazardous using of antibiotics on long run creates several health problems for animals as well as humans. Therefore, countries searched for natural alternatives that incorporate antimicrobials in livestock and poultry ration without any adverse effect on both productivity and health. One of these important and promising alternatives is microalgae. Microalgae are microscopic, uni- or multi-cellular and photosynthetic algae that grow in marine, fresh and brackish water. They considered as rich sources of proteins, essential fatty acids, carbohydrates, vitamins, minerals, pigments and antioxidants. Several types of microalgae have been used safely in human, animals and poultry. Different species of microalgae as Spirulina, Chlorella and others proved positive influences on poultry nutrition. Therefore, this review article aimed to show the effects of using different types of microalgae on the productive characteristics, immune response, microbial resistance and carcass trait of poultry.