expert type icon EXPERT

Maira Jessica Medellin-Peña

Infectious Disease Specialist

Dr. Maira Medellin-Peña specializes in foodborne infections that are difficult to diagnose or unresponsive to treatments. Infectious disease specialists usually work with conditions that are not treatable by a primary physician but it is important to keep contact with the primary physician in order to receive information about the patients history and for deciding which diagnostic tests are appropriate.
17 years Experience
Maira Jessica Medellin-Peña
  • Guelph University
  • Not accepting new patients

Do I have pinworms?

Many people with pinworm infections do not have symptoms and do not need treatment to cure the infection. The infection may go away on its own, but it will take months Some doctors READ MORE
Many people with pinworm infections do not have symptoms and do not need treatment to cure the infection. The infection may go away on its own, but it will take months Some doctors suggest treating with anti-parasite medication all close contacts of a person with pinworms even if there are no symptoms. The best way to prevent an infestation (or re-infestation) is properly washing your hands. Your hands are the part of your body most likely to transfer the pinworm eggs so it is extremely important to keep them clean. Make sure you and your family wash hands before eating or handling food, after using the bathroom. There are some natural remedies that people have used with some results, but is not 100% efficient for all. There is garlic, coconut and avocado oil and raw carrots. Good luck!

What is the way to treat antibiotic-resistant bacteria?

The doctor can ask for a test where they add different classes of antibiotics together. Testing synergy between different classes of antibiotics is one option used to determine READ MORE
The doctor can ask for a test where they add different classes of antibiotics together. Testing synergy between different classes of antibiotics is one option used to determine efficacy of drug combinations for the treatment of multiply drug- resistant organisms. The problem is that this testing is not yet widely available and your doctor can empirically choose a combination of antibiotics that could work for you.

Can my chest infection pass on to my child?

Please ensure that the doctor who is treating your infection has answered all your concerns, as they know your specific disease and the antibiotics they are using.

Is there a way to prevent the hand foot mouth disease spreading in children?

You can prevent the spreading by washing your hands often with soap and water, especially after using the toilet. You can also ensure that they clean and disinfect frequently touched READ MORE
You can prevent the spreading by washing your hands often with soap and water, especially after using the toilet. You can also ensure that they clean and disinfect frequently touched surfaces and soiled items, including toys.
Most importantly but often the MOST DIFFICULT task is making sure that children wash their hands after using the washroom, before eating and try to stress to them the importance of not touching their mouth, nose and eyes with unwashed hands.

Is herpes cold sores an infectious disease?

The herpes simplex virus (HSV-1) is a contagious virus that can be passed from person to person through DIRECT contact. Children will often contract HSV-1 from early contact with READ MORE
The herpes simplex virus (HSV-1) is a contagious virus that can be passed from person to person through DIRECT contact. Children will often contract HSV-1 from early contact with an infected adult.

Can typhoid pass from mother to baby?

Typhoid fever is highly contagious. An infected person can pass the bacteria out of their body in their stools. Thoroughly washing of hands after using the washroom and keeping READ MORE
Typhoid fever is highly contagious. An infected person can pass the bacteria out of their body in their stools. Thoroughly washing of hands after using the washroom and keeping good sanitation at home will help to reduce the risk of spreading.

Can typhoid cause hearing loss?

Hearing loss due to cochleovestibular lesions caused by typhoid fever are very rare. These lesions occur most commonly between the second and third weeks of the disease. Typhoid READ MORE
Hearing loss due to cochleovestibular lesions caused by typhoid fever are very rare. These lesions occur most commonly between the second and third weeks of the disease. Typhoid fever usually lasts between one and two weeks, but can be as short as three days; depends on when you start taking antibiotics. Untreated, the illness usually lasts for three to five weeks. The exact mechanism of hearing loss in typhoid fever has not been established, but some patients have shown good responses to treatment.

How is H.pylori infection treated?

The Toronto Consensus for the Treatment of Helicobacter pylori Infection in Adults published in 2016 in the Gastroenterology Journal (Gastroenterology 2016;151:51–69). Optimal READ MORE
The Toronto Consensus for the Treatment of Helicobacter pylori Infection in Adults published in 2016 in the Gastroenterology Journal (Gastroenterology 2016;151:51–69).

Optimal treatment of H. pylori infection requires careful attention to local antibiotic resistance and eradication patterns. The quadruple therapies PAMC* or PBMT* can help in the eradication of H. pylori infection, and all treatments should be given for 14 days. PPI triple therapy (PPI + clarithromycin + either amoxicillin or metronidazole) is restricted to areas that have low clarithromycin resistance or high eradication success with the triple therapy regimens.

*Non-bismuth quadruple therapy (Proton pump inhibitor + Amoxicillin + Metronidazole + Clarithromycin) and traditional bismuth quadruple therapy (PPI |+ bismuth + metronidazole + tetracycline).

How can one distinguish between a viral and a bacterial infection?

I am glad you are seeking more information regarding viral and bacterial upper respiratory infections. For a doctor it should be easy to distinguish between a viral and a bacterial READ MORE
I am glad you are seeking more information regarding viral and bacterial upper respiratory infections. For a doctor it should be easy to distinguish between a viral and a bacterial infection and often although they diagnose you with a viral infection they prescribe antibiotics due to the possibility of you acquiring a secondary "bacterial" infection - this happens when your immune system is low as it is fighting the viral infection- I avoid prescribing antibiotics unless I am sure it is a bacterial infection and try to educate people telling them to avoid using medications that lower the low grade fever (between 37.5 and 38 degrees Celsius) during the first 2-3 days (unless you need to use them for pain purpose, we don't want you suffering pain). This helps kill the virus attacking your body as it is our natural defense mechanism. I tell them to go to the doctor if the fever persists longer than 3 days or there is evidence of bacterial infection (yellow-greenish nasal discharge, productive cough with yellow-greenish sputum, etc). We are trying to avoid misuse of antibiotics in order to prevent antibiotic resistance in the future, we want the antibiotics to be able to do their job when we really need them!

What are the best remedies to treat and prevent the recurrence of UTI?

UTIs are more frequent in some women than others and you should talk to your doctor to figure out if there are any anatomical irregularities and also to check what microorganism READ MORE
UTIs are more frequent in some women than others and you should talk to your doctor to figure out if there are any anatomical irregularities and also to check what microorganism is/are causing them and if there is any antibiotic resistance. To treat appropriately, you should have a urine culture and take antibiotic that targets the microorganism that is causing your UTI, also a minimum of 2 weeks antibiotics and start taking probiotics after you finish your antibiotic treatment.
I would recommend drinking plenty of fluids, take probiotics daily and, if you are sexually active, always empty your bladder after intercourse (it helps flush bacteria that might have made its way up the urethra).

Who should I consult for a rash after unprotected sex?

Your family doctor would be my first choice.

Is chicken pox really something you need a vaccine for?

Although Chickenpox is usually mild in children, it can cause more serious problems when teens and adults get it. People with weakened immune systems are especially susceptible READ MORE
Although Chickenpox is usually mild in children, it can cause more serious problems when teens and adults get it. People with weakened immune systems are especially susceptible to developing serious complications from chickenpox. Also, once you get chicken pox the virus is dormant and later in life when your immune system is weakened (due to a myriad of causes - stress, colds, etc.) you might develop shingles which can be extremely painful and depends on the location it can cause serious health effects.

Can fungal infection in the swimming pool spread from one person to another?

Fungi usually make their homes in moist areas of the body where skin surfaces meet: between the toes, in the genital area, and under the breasts. Common fungal skin infections READ MORE
Fungi usually make their homes in moist areas of the body where skin surfaces meet: between the toes, in the genital area, and under the breasts. Common fungal skin infections are caused by yeasts (such as Candida or Malassezia furfur) or dermatophytes, such as Epidermophyton, Microsporum, and Trichophyton. Your infection can come from a variety of sources but swimming pools and gym's washroom are good guesses from where you could have caught the infection, but remember these yeasts are usually harmless and they take over when your immune system is depressed. If you want to boost your immune system, research some natural immunity boosters!

Is influenza an infectious disease?

There are some peer reviewed publications that found evidence that the aerosol route is an important mode of transmission of influenza A virus and may be important for influenza READ MORE
There are some peer reviewed publications that found evidence that the aerosol route is an important mode of transmission of influenza A virus and may be important for influenza B virus. There is still some controversy but evidence of viral contamination on surfaces, and in the air are both important modes of transmission for influenza virus.

My 4 year old toddler recently contracted HFMD. What could be the reason?

Hand, foot and mouth disease is a contagious illness that is spread from person to person by direct contact. There must have been contact with an infected person.

Is Cepodem 100 a very strong antibiotic for a 3 year old?

Sorry, you are giving your child 120 mg per day which is within the 65 to 200 mg per day.

If I have a stomach infection is it likely to affect my unborn baby?

Some infections are of special concern as they possess very specific traits that can cause harm to the unborn baby. Luckily, our bodies have several defense mechanisms that can READ MORE
Some infections are of special concern as they possess very specific traits that can cause harm to the unborn baby. Luckily, our bodies have several defense mechanisms that can protect the unborn baby and only a handful of microorganisms can cause harm to the fetus or the pregnancy. Some infectious diseases are of special concern because they are specific to the genitourinary system or because they occur more frequently or are more severe in the pregnant woman. Talk to your OBGYN so he/she can determine what course to take for your specific case. Without knowing what organism is causing your stomach infection, it is impossible to say what are the risks.

Genital wart?

I recommend you seeing a physician or OBGYN as genital warts are caused by human papillomavirus (HPV) and some types of HPV are linked to the possibility of further development READ MORE
I recommend you seeing a physician or OBGYN as genital warts are caused by human papillomavirus (HPV) and some types of HPV are linked to the possibility of further development of cancer of the cervix or the vulva. In addition, the physician will have the expertise to properly remove the wart in order to prevent its spread (some can grow quite large if not properly treated).

Can my child give me chickenpox?

Hi, The U.S. Center for Disease Control and Prevention (CDC) recommends the following chickenpox (varicella) vaccination schedules for all healthy teenagers and adults who have READ MORE
Hi,

The U.S. Center for Disease Control and Prevention (CDC) recommends the following chickenpox (varicella) vaccination schedules for all healthy teenagers and adults who have never had chickenpox or the vaccine should receive 2 doses of the varicella vaccine, given 4 - 8 weeks apart.

Good luck!

Cough for 1 week plus - should I worry?

It sounds like an infection as your body is reacting, but in order to determine the causative agent, you should seek medical attention. Hope you feel better soon!