INTRODUCTION Actinomycetes are those groups of bacteria which are thin and have cell wall made up of muramic acid. Their nuclei are prokaryotic and are susceptible to antibacterial antibiotics. They look similar to fungi superficially as they form branching filaments. They are related to mycobacteria and corynebacteria. Image source: slideplayer They are Gram-positive, non-sporing, non-motile, … Read more
The period between conception (fertilization) and birth is called pregnancy. The pregnancy period generally lasts for 9 months and 7 days. During this period, some health problems are observed. They can be in the form of minor problems and major problems both. A)Minor problems of pregnancy The various minor problems of pregnancy are: Nausea and … Read more
The oral cavity is one of a complex, heterogeneous microbial habitat. Saliva contains microbial nutrients, but it is not an especially good growth medium because the nutrients are present in low concentration. Also the saliva contains antimicrobial substances. Saliva contains an enzyme lysozyme that cleaves glycosidic linkages in peptidoglycan present in the bacterial cell wall, … Read more