difficulty swallowing, fever, pain in neck, sore throat

Pharyngitis (far-in-jī' tis) is a painful inflammation of the pharynx, and is colloquially referred to as a sore throat. Infection of the tonsils, tonsillitis may occur simultaneously. ... 

fever, poor appetite, sore throat, white patches in mouth or throat

Strep throat (or "Streptococcal pharyngitis", or "Streptococcal Sore Throat") is a form of Group A streptococcal infection that affects the pharynx. ... 

pain in neck, sore throat, stomach pain, upper abdominal pain

Infectious mononucleosis, (also known as the kissing disease, or Pfeiffer's disease, in North America as mono, and more commonly known as glandular fever in other English-speaking countries), is a disease seen most commonly in adolescents and young adults, characterized in teenagers by fever, sore throat, muscle soreness, and fatigue. Mono typically produces a very mild illness in small children. White patches on the tonsils or in the back of the throat may also be seen, (resembling strep throat). Mononucleosis is usually caused by the Epstein-Barr virus (EBV), which infects B cells (B-lymphocytes), producing a reactive lymphocytosis and atypical T cells (T-lymphocytes) known as Downey bodies. ... 

difficulty swallowing, fatigue, pain in neck, sore throat

The Epstein-Barr virus (EBV), also called Human herpesvirus 4 (HHV-4), is a virus of the herpes family (which includes Herpes simplex virus and Cytomegalovirus), and is one of the most common viruses in humans. Most people become infected with EBV, which is often asymptomatic but commonly causes infectious mononucleosis. It is named after Michael Epstein and Yvonne Barr, who together with Bert Achong discovered the virus in 1964. ... 

difficulty swallowing, poor appetite, sore gums or bleeding gums, sore throat

Stomatitis is an inflammation of the mucous lining of any of the structures in the mouth, which may involve the cheeks, gums, tongue, lips, and roof or floor of the mouth. The inflammation can be caused by conditions in the mouth itself, such as poor oral hygiene, poorly fitted dentures, or from mouth burns from hot food or drinks, or by conditions that affect the entire body, such as medications, allergic reactions, or infections. A form of stomatitis known as stomatitis nicotina can be caused by smoking cigars, cigarettes, and pipes, and is characterized by small red bumps on the roof of the mouth. ... 

difficulty swallowing, poor appetite, sore throat, white patches in mouth or throat

Tonsillitis is an inflammation of the tonsils in the mouth and will often, but not necessarily, cause a sore throat and fever. Symptoms may also include pain in the tonsil area and inability to swallow and/or painful swallowing . White spots may also appear on the tonsils. ... 

fever, poor appetite, rash, redness in skin

Scarlet fever is an exotoxin-mediated disease caused by Group A streptococcal infection that occurs most often in association with a sore throat and rarely with impetigo or other streptococcal infections. It is characterized by sore throats, fever and a rash over the upper body that may spread to cover almost the entire body. Scarlet fever is not rheumatic fever, but may progress into that condition as the infection develops (rheumatic fever is the autoimmune disease that occurs after infection with Group A strep). ... 

headache, poor appetite, vomiting, weakness

Encephalitis is an acute inflammation of the brain, commonly caused by a viral infection. Sometimes, encephalitis can result from a bacterial infection, such as bacterial meningitis, or it may be a complication of other infectious diseases like rabies (viral) or syphilis (bacterial). ... 

dizziness, fever, paleness, sore throat

Aplastic anemia is a condition where bone marrow does not produce sufficient new cells to replenish blood cells. ... 

dental problems, fatigue, fever, sore throat

Agranulocytosis (literally meaning an increase of agranulocytes or more commonly, a lack of granulocytes) is an acute condition involving a severe and dangerous leukopenia (reduction in the number of white blood cells) in the body. Concentrations of granulocytes (a class which includes neutrophils, basophils and eosinophils) can often drop to below 500 cells/mm³ of blood), less than a sixth of the reference value of 3-10 x 103 cells/mm³. ...