Although herbaceous stems all have the same basic tissues, the arrangement of tissues varies considerably. a. Herbaceous dicot stems have vascular bundles arranged in a circle (ring) in x-section, and have a distinct cortex and pith. b. Herbaceous monocot stems have scattered vascular bundles and ground tissue instead of a distinct cortex and pith.
Acute pharyngitis remains contagious till the fever and other symptoms are not cured, it may take 48 to 72 hours to get relief from pain and fever when a person is on antibiotics therapy in streptococcus infection.
Back to Top Causes. Pharyngitis is caused by swelling in the back of the throat (pharynx) between the tonsils and the (larynx). Most sore throats are caused by colds or the flu. Coxsackie virus or mononucleosis can also cause sore throat. Bacteria that can cause pharyngitis in some cases. 1  Strep throat is caused by group A streptococcus. 2  Less commonly, bacteria such as corynebacterium, gonorrhea, and chlamydia can cause sore throat.