Category: Bloodborne Pathogens

Congo’s Uncharted Territory

By Rebecca Kreston | August 19, 2013 7:51 pm

The Democratic Republic of Congo is home to one of the largest and most biologically diverse rain forests in the world, featuring an incredible variety of animals including bonobos, forest elephants, and mountain gorillas. The country is also the stomping ground of a staggering array of microbial organisms and the region is well known as a wellspring of novel human pathogens, some with big household names and others little known. Some of these diseases, such as HIV/AIDS, have emerged as recognizably major pandemics; others, such as Ebola virus, have been limited to small, localized outbreaks; others still, such as the mosquito-borne Chikungunya virus, pose the risk of becoming new threats to global health.

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The End of Antibiotics?

By Rebecca Kreston | August 1, 2013 7:00 pm

Maryn McKenna has an unsettling and sobering article at Nature examining the the emergence of carbapenem-resistant Enterobacteriaceae. Since 2002, this large family of  bacteria, gram-negative organisms that include many symbionts as well as the gut-dwelling Escherica coli and Klebsiella species that cause hospital infections, are increasingly in possession of a carbapenem-resistance gene rending our best antibiotics useless.

A blue and white map of the United States showing states with carbapenemase-producing CRE confirmed by CDC.

A map of the United States showing states with carbapenemase-producing CRE that promote resistance to carbapenem antibiotics as confirmed by CDC as of September 2012.

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A Formula for Hate: Captain Planet & the Planeteer’s HIV Episode

By Rebecca Kreston | June 28, 2013 1:45 pm

Earth! Fire! Wind! Water! Heart! “Captain Planet and Planeteers” is a classic of 1990s television and may soon appear on the big screen as a live-action movie. The animated television series featured five earnest teenagers equipped with magical powers fighting eco-villains intent on destroying the ozone, rainforest and the wetlands and guided by the sage wisdom of Gaia, the spirit of Earth, and Captain Planet. Today, the program is recognized for its environmental “edutainment” pitch and the emerald-mulleted, square-jawed appearance of its titular superhero.

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Call Me Maybe: Social Media & the Spread of STDs

By Rebecca Kreston | April 25, 2013 9:03 am

April! We’ve passed the vernal equinox and spring is springing, flowers are blooming, we’re shedding our sweaters and jackets and all will be warm once again. We can put our winter blues to rest and bask in the knowledge that summer will soon be upon us.

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Suck It: The Ins and Outs of Mouth Pipetting

By Rebecca Kreston | March 20, 2013 12:15 pm

If you ever find yourself working in an infectious disease laboratory, whether it’s of the diagnostic or research variety, the overarching goal is not to put any microbes in your eye, an open wound or your mouth. Easy enough, right? Wear gloves, maybe goggles, work in fume hoods and don’t mouth pipette. When working with pathogenic bacteria and viruses, priority number one is Do Not Self-Inoculate.

Former Centers for Disease Control (CDC) parasitologist, Dr. Mae Melvin (Lt), examines a collection of test tubes while her laboratory assistant mouth pipettes a culture to be added to these test tubes. Source: David Senser/CDC.

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Adventures in Dentures: The Street Dentists, Barbers & Tattoo Artists of India

By Rebecca Kreston | February 21, 2013 7:35 pm

My father-in-law David is a dentist and he recently emailed me an astonishing, must-watch video, “The Dentist of Jaipur.” A short documentary by Falk Peplinski that made the rounds of film festivals in 2006 and 2007, the four-minute film shows two men in this famed city in Rajasthan, India practicing dentistry on the streets.

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June 5, 1981. Pneumocystis Pneumonia. Los Angeles.

By Rebecca Kreston | January 9, 2013 9:42 am

The Pump Handle, an online “water cooler for the public health crowd”, have been publishing a series of articles on Public Health Classics, “exploring some of the classic studies and reports that have shaped the field of public health.” From lead poisoning to the Surgeon General’s 1964 report on the implications of cigarette smoking, the series makes for engrossing material about how our health and standards of living have radically changed due to pivotal research and medical findings.

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A Season of Hemorrhagic Fevers

By Rebecca Kreston | November 23, 2012 6:50 pm

Uganda and the Democratic Republic of Congo have been bedeviled by viral hemorrhagic fever outbreaks this year. Since the summer, Ebola and Marburg have appeared throughout the two verdant countries killing dozens of people.

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The Immunological Blitzkrieg That Is HIV Infection

By Rebecca Kreston | November 9, 2012 4:51 am

It can be hard to comprehend the damage that pathogenic viruses and microbes can inflict on the human body, especially if you have scientists prattling on about cells, using multi-syllabic acronyms and tossing around – god forbid! – actual numbers. It’s helpful to have easily understood images to help put diseases into perspective, to understand that viruses like HIV have tangible and real effects. That’s why I’m so happy to have stumbled upon an incredible image from a 2004 paper that is a pictorial testament to the immunological blitzkrieg that is HIV infection.

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The Sea Has Neither Sense Nor Pity: the Earliest Known Cases of AIDS in the Pre-AIDS Era

By Rebecca Kreston | October 22, 2012 3:35 am

This is the story of a sailor and a pirate, and the two different types of oceans that they traversed. There are seven on Earth but only one courses through man. This ocean contains no mysterious and pale sea creatures, bottomless depths or brightly-flashing predators, but it does brim with industrious cells, with dissolved carbon dioxide and occasionally with unwanted parasites.

In August of 1961, a Norwegian teenager sailed from a fjord in Oslo through the North Sea and the Atlantic Ocean to Douala, Cameroon, a port tucked under the outward slab that makes up West Africa. He was a freshly turned fifteen year old and was working as a kitchen hand on a Norwegian merchant vessel. From Cameroon, he and his crew on the Hoegh Aronde sailed northwesterly from port to port, docking at Nigeria, Ghana, Cote D’Ivoire, Liberia, Guinea and Senegal over a period of 10 months before returning to his homeland (1).

It was an exotic start to what would be a short but wide-ranging career as a sailor – over a period of four years, he would call at ports in Asia, Europe, Canada and throughout the Caribbean. Though he would never find himself in West Africa again, he would always carry a souvenir of his visit to this incredibly diverse and ecologically rich niche of the world.

The route of the Norwegian sailor’s initial trip abroad on the Hoegh Aronde, from Oslo, Norway to Doula, Cameroon from August 1961 to May 1962. Image: Edward Hooper, 1997 (See References). Click for source.

His journeys were lonesome, solitary. In Cameroon the sailor unburdened himself of his loneliness and slept with at least one woman, catching gonorrhea – this much is known. Perhaps it was the same woman or another that infected him with an unfamiliar virus simmering away in West Africa just waiting to travel foreign oceans and lands. A viral hitchhiker with a proclivity for the horizon, a pirate if you will. This virus, a certain strain of HIV included in the rare outlier group O that is genetically and immunologically distinct from the main group M that is plaguing the world today, a HIV group that native to West Africa and to Cameroon in particular but found itself in a Norwegian man who would travel the world.

When he returned to his homeland in 1965, he married and became a father to two children in a short two-year span. In spite of his exciting new role as  husband and father, he often felt unwell and his family was plagued with strange illnesses. His muscles ached, a red rash covered his body and he found himself often besieged by respiratory ailments (2). In 1967, his wife became ill with fevers, an omnipresent yeast infection as well as the same respiratory infections that lurked in her husband. The next year, the sailor would see his youngest daughter developing unusual diseases not often seen in toddlers – arthritis, blood and bone infections, along with the same yeast and respiratory infections afflicting her family.

Despite his poor health, the sailor found himself crossing the sea again to Europe. From 1969 to 1973, he worked as a long-distance truck driver delivering cargo as he traversed Belgium, the Netherlands, France, Germany, Austria, Switzerland and Italy (1).

With his ailing family far away across the North Sea, the sailor would seek refuge again in Europe. His coworkers would later say that he slept with many women and prostitutes along his long and lonely lorry routes. Often beginning his route in Wesseling, Germany, he would deliver to Liége and Lyons in France, occasionally stopping in Reims between the two cities (1). Investigators in this part of France would later find cases of HIV group O in individuals that had died in the late 1970s and early 1980s but had never visited verdant Cameroon.

In 1974, the sailor fell deeply ill. He died two years later, at the age of 29, his body riddled by bizarre diseases and was followed quickly in death by his wife and his youngest daughter. Autopsies would find puzzling results – overwhelming systemic infections not often seen except in the severely immunocompromised. The pathologist conducting the autopsy would save the sailor’s lymph node, liver, kidney and lung, the mother’s leg muscle and the daughter’s lymph node, spleen and liver and, years later, the family’s serum samples would test positive for HIV antibodies. This unfortunate family, to this day unidentified, represent the first recorded cluster of confirmed HIV/AIDS infections in the pre-AIDS era, before the AIDS pandemic sparked in the late 1970s and early 1980s. The sailor’s daughter is the earliest known case of pediatric AIDS (3).

“The sea has neither sense nor pity,” wrote Anton Chekov in his short story “Gusev”. Blood churns, dark liquids pumped through the valves by the stalwart heart, all the while feeding our bodies oxygen. A corrosive virus pirates the sea, hijacking cells and visiting the ports of our body, our brain, muscles, spleen and liver. Why infect that one person, at that moment in time? There is no meaning or sense to it. The tides rise, the tides fall. The earth spins, blood spills. A ship makes its port on schedule, becomes lost or is brought to the bottom of the sea. A man dies from an infection caught 15 years earlier in a distant port, a salty partner that he introduced to his family. There is no meaning, little salvation and only grief.

Note

This article was awarded the Best Life-In-Science post at the inaugural ScienceSeeker awards for 2012-2013.

Resources

If you’d like to read the “Gusev” story by Chekhov, you can do so here.

Shortly after the researchers’ work into the Norwegian AIDS cluster, researchers from Tulane discovered evidence that a St. Louis teenager, Robert Rayford, was infected and died of AIDS in 1969. His case is troubling – a 15 year old succumbing to an infection that typically takes year before progression to AIDS and death. Some sources claim he was a gay prostitute while others say that he was sexually abused as a child. Whichever tragic alternative it may be, the fact remains that this boy had never traveled outside of St. Louis, someone infected him and that AIDS was most certainly circulating in a limited fashion in the United States before the 1970s. Read more about him in this 1988 New York Times article.

A few months back, I created a playlist of hip hop and R&B artists singing about the HIV/AIDS crisis and admonishing safe sex to their listeners. Check out the playlist and accompanying article “Let’s Talk About Sex: Hip Hop on HIV” here.

References

1) Hooper E. (1997) Sailors and star-bursts, and the arrival of HIV. BMJ. 315(7123): 1689-91

2) Lindboe CF et al. (1986) Autopsy findings in three family members with a presumably acquired immunodeficiency syndrome of unknown etiology. Acta Pathol Microbiol Immunol Scand A. 94(2):117-23

3) Frøland, SS et al. (1988) HIV-1 infection in Norwegian Family before 1970. Lancet. 1(8598): 1344-5

ResearchBlogging.org
Frøland SS, Jenum P, Lindboe CF, Wefring KW, Linnestad PJ, & Böhmer T (1988). HIV-1 infection in Norwegian family before 1970. Lancet, 1 (8598), 1344-5 PMID: 2897596

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