H2S test (hydrogen sulfide test) principle, procedure, reagents

H2S test is an important test in microbiology for the identification of various enterobacteria and Brucella species. H2S test principle H2S (hydrogen sulfide) produced by many bacteria due to reaction with sulphur containing amino-acid. This H2S (hydrogen sulfide) detected by a change in colour by the reaction of H2S and ferrous chloride leading to black … Read more

microbiology test bank (quiz microbiologia)

microbiology test bank Here are important microbiology MCQs and answer key 1) Gram-positive bacteria attain……..color in Gram staining? a. Purple      b. pink c. red 2) Gram-negative bacteria stained as……….. in Gram stain.A. blue b. pink c. purple 3) Prokaryotes differ from Eukaryotic by……….a. binary fission b. mitosis   c. both 4) Morphologically COCCI are ………in shape.a. oval b. spiral c. … Read more

How does plasmodium falciparum evade the immune system

How does plasmodium falciparum evade the immune system

Plasmodium falciparum, the parasite responsible for the most severe form of malaria, has evolved sophisticated mechanisms. These mechanisms allow it to invade the human immune system. These strategies allow it to survive and replicate in its host. Here are the seven primary mechanisms that helps p.falciparum to evade the host immune system. Antigenic Variation Cytoadherence … Read more