Infectious diseases , also known as contagious diseases or transmissible diseases , and include communicable diseases , comprise clinically evident illness (i.e., characteristic medical signs and/or symptoms of disease ) resulting from the infection , presence and growth of pathogenic biological agents in an individual host organism. In certain cases, infectious diseases may be asymptomatic for much or all of their course. Infectious pathogens include some viruses , bacteria , fungi , protozoa , multicellular parasites , and aberrant proteins known as prions . These pathogens are the cause of disease epidemics , in the sense that without the pathogen, no infectious epidemic occurs. Transmission of pathogen can occur in various ways including physical contact, contaminated food, body fluids, objects, airborne inhalation, or through vector organisms. Infectious diseases that are especially infective are sometimes called contagious and can be easily transmitted by contact with an ill person or their secretions. Infectious diseases with more specialized routes of infection, such as vector transmission or sexual transmission, are usually regarded as contagious but do not require medical quarantine of victims. The term infectivity describes the ability of an organism to enter, survive and multiply in the host, while the infectiousness of a disease indicates the comparative ease with which the disease is transmitted to other hosts.
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Premium Questions (955)
I have what I think is a boil on my calf. It's got a dark scab and it's red, firm and warm to the touch for about an inch in diameter around it. It's painful. I don't recall it having the usual white head other...
My 16 year old son, have been tired , with a headace, dizziness, lack of energy and says he has a sour throat. He has no fever. Eating well and drinking also.
I have swelling aroung my collarbone that is visible. It is tender to touch and have been dealing with a slight fever.. What could this be.
I am 30yrs/Male, suffering from recurrent skin infections, only over face, the history is only of last 6-8 months..Boils comes and goes very often in the face. In last 6-8months. I already completed 5-6 courses of...
Hi,
On 13th July '11 I started with fever (101 deg). On 15th July, my doctor recommended me to get Typhoid tested. 15th July evening typhoid igm was positive. He started a course of Zanocin 200 for 5 days along with paracetamol. My Fever was...
i've had the mumps, the symptoms in my cheeks are gone (no more swollen cheeks), but last saturday i had a testicular infection which since yesterday became endurable, today i'm walking about and it's rather...
Hello Im 22 female have had a fever off and on sense September 2012 my doctor ordered blood work to see whats wrong my sedimentation rate was 60 and my c reactive was 5.5 and my rdw was 17.7 everything els was normal...
Hello. I have a friend that told me about a small knot he had on his leg. He drives big rigs for a living and believes he my have bumped his leg on something, He ended up putting enough pressure on it that it...
My 5 year old had grommets inserted 8 months ago and has had no infections since. He has just woken up with a bleeding ear. No fever. Can we wait until morning to see a doctor?
My 2 year old was a little off after I picked him up from daycare he had a nap now he has woken up with a fever and rosy cheeks and not breathing very well
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Online Doctor Chat (634) - Infectious Diseases
Doctor : hi
Doctor : how can i help you?
User : HELLO SIR
Doctor : hi
Doctor : please proceed
User : WHITENESS INCREASING FROM FROM FRONT CORNERS OF THE NAIL ,AND PAIN BELOW THE NAIL IN THAT ZONE
Doctor : ok
Doctor : since when?
User : A...
User : hi
User : any one there
Doctor : Hi
Doctor : How can I help you
User : is this an online chat facilty
Doctor : Yes.
User : may i know whoma ma i speakin with
User : from which hospital
User : place
User : u there
Doctor : We...
User : Is a temperature of 103.7 something to go to the emergency room for?
Doctor : hi
Doctor : how can i help you?
User : Hello...Is a temperature of 103.7 something to go to the emergency room for?
Doctor : yes it is high fever
Doctor : it...
Doctor : hi
Doctor : how can i help you
User : Hi sir
Doctor : please go ahead with
User : I have "phoonsi" on the angle of my lips
User : they have erupted just 4 days ago
User : and rising everyday
Doctor : pimples isit
User : no only on...
Doctor : hello
Doctor :
how can i help u?
User : HI I had brown spotting staring on sept 4 and lasted for 5-6 days and I have had mild cramping since then. Im 27 female sexually active and on Alesse 28. I have normal menstral periods. My...
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Public Forum (3878) - Infectious Diseases
2 Answers
is lymphnode Tb contagious?
1 Answer
my grandchild age 5 years has the habbit of knuckle biting? can you advise treatment or any medicine to stop biting nailk? what the cause of biting knuckles?
2 Answers
how can resolve treatises disease
1 Answer
will cicken guinea fever affect bones in longterm for a women around 45years age
1 Answer
i am 25 having tiny white spots on my legs . from what disease iam suffering from i am 25 having tiny white spots on my legs . from what disease i am suffering from.
2 Answers
hi, i would like to know about a disease called ANA. Our teacher wants us to find out. This disease caused rapid emaciation and the person died within 10 days of diagnosis . all that i was able to find out was about the ana test, but not the disease. can you please help me?
1 Answer
my doctor prescribed megamox 1g tablets as I had tooth ache. Now I am suffering ffrom fever . What are the side effects of this tablet and how can I be cured fastly?
1 Answer
Hi, please my son of 3 yrs old has been having fever since 2 days. It has been subsiding when I used panadol for him but it lasts for about 4 hours and the temperature rises again. Can I used ponstel suspension instead of panadol or what advise can you give. no other symptoms apart from that he is not eating well as usual. Thank you
1 Answer
My daughter is almost 2 and two weeks ago she came down with a cough then she got drainage real bad. The doctor said it was allergies now she has the drainage still but she now has red bumps on her face, butt and some on her stomach . They don t seem to itch or anything and she doesn t have a fever so I don t know what it could be.
1 Answer
hi doctor :) my 1yr & 4 month old baby had taken suppository for fever last tuesday and wednesday. then just this thursday & friday he had hard small bowels. yesterday oday and the tried to push but nothing came out. im quiet worried because its been 2 days since he pooped. and nothing has changed on his eating habits. pls help. was this caused...
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