Grieckspoor Campylobacter jejuni in Penguins, Antarctica The wildlife of Antarctica is highly specialized. Although large animal species are limited primarily to penguins and seals, each species is often abundant. The high degree of isolation potentially protects Antarctic wildlife from diseases distributed in other areas of the world (1,2). Despite Antarctica’s isolation, however, human- or animal-related pathogens have been found there, or in the sub-Antarctic islands. For instance, serologic evidence of influenza virus A infections in penguins has been found (3), and both Salmonella spp. and Mycobacterium tuberculosis have been isolated from sub-Antarctic and Antarctic animals (4,5). Campylobacter jejuni is a leading cause of bacterial gastroenteritis in humans worldwide; it is usually found in the intestinal tract of various farm and wild animals, particularly birds (6,7).We previously reported finding 3 C. jejuni subsp. jejuni isolates in macaroni penguins (Eudyptes chrysolophus; Figure) from Bird Island (54°00′S, 38°02′W), South Georgia (1). Phenotypic tests and 16S rRNA gene sequencing showed that the penguin isolates were identical to each other, and macrorestriction profiling of pulsed-field gel electrophoresis fragments showed that they were very similar to fragments isolated from poultry in Washington in 1984 (1). Because the isolates were retrieved from macaroni penguin chicks, we concluded that the animals had acquired the infection locally and that this was likely an instance of introduction of a pathogen to the Antarctic region.

Paredes "The first influenza pandemic of the 21st century" H1N1 Influenza Pandemics: Comparing the Events of 2009 in Mexico with those of 1976 and 1918–1919 Outbreaks of influenza A (H1N1) of avian- or swine-related origin have substantially impacted human populations. The most dramatic pandemic of influenza H1N1 occurred during 1918–1919 producing significant morbidity and mortality worldwide. In the 20th century, two other major pandemics took place but they were the H2N2 and H3N2 reassorted influenza strains. In 1976, a small outbreak of swine-related H1N1 in the U.S. led to a national scare but without any significant public health impact. More recently, in April 2009, in Mexico, and subsequently worldwide, an influenza (H1N1) triple reassortant strain produced >200,000 laboratory-confirmed cases and resulted in >2000 deaths. In August 2009, WHO declared this outbreak as the first influenza pandemic of the 21st century. It is critical to apply lessons learned during previous pandemics to mitigate the public health impact of the ongoing influenza pandemic in 2009. In particular, it is useful to compare the events in Mexico in 2009 to those during the Spanish influenza pandemic of 1918–1919.