Archive for the ‘ProMED’ Category

Plague in Uganda

Monday, February 13th, 2012

The following background data on Plague in Uganda are abstracted from Gideon www.GideonOnline.com and the Gideon e-book series. [1,2]

The earliest record of plague in Africa was a report by missionaries in Uganda in 1877, and reporting statistics for much of the continent have been documented for more than 100 years.

A series of plague epidemics were recorded in East AFrica during the 1920′s and 1930′s – see graph [3]

31,305 plague deaths were reported in Uganda during 1910 to 1919; 17,410 during 1920 to 1929; 11,387 during 1930 to 1939.

Presumed local reservoirs include the Nile rat, Arvicanthus niloticus.
- Presumed local flea vectors include Xenopsylla cheopis and X. brasiliensis.

Notable outbreaks:
1982 – An outbreak (152 cases, 3 fatal) was reported.
1986 – An outbreak (340 cases, 27 fatal) was reported.
1993 – An outbreak (167 cases, 18 fatal) was reported in Western Region (Nebbi District).
1998 – An outbreak was reported in Arua district.
2001 – An outbreak was reported in Nebbi District.
2004 – An outbreak (4 cases, 1 confirmed, 3 fatal) of pneumonic plague was reported in Kango Subcounty.
2006 – An outbreak (127 cases, 11 fatal) was reported in Arua and Nebbi Districts – including 12 cases of pneumonic plague.
2007 – Outbreaks (179 cases, total) were reported in Masindi District (19 cases, 9 fatal), and in Arua (121 cases, 10 fatal) and Nebbi (39 cases, 9 fatal).
2008 – An outbreak (68 deaths) was reported in Arua and Nebbi.

References:
1. Berger SA. Infectious Diseases of Uganda, 2012. 398 pp, 61 graphs, 1,711 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-uganda/
2. Berger SA. Plague: Global Status, 2012. 98 pp, 102 graphs, 524 references. Gideon e-books, http://www.gideononline.com/ebooks/disease/plague-global-status/
3. Gideon graph tool at http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps

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Hepatitis A in the Netherlands

Saturday, February 11th, 2012

Rates of Hepatitis A in the Netherlands and bordering countries have been decreasing since the 1990′s – see graph:

The following background data are abstracted from the Gideon e-books series. [2,3]

Time and Place:
- Hepatitis A has been a notifiable disease in the Netherlands since 1951.
- Disease rates peak during October, largely due to increased number of cases acquired abroad.
- During 1993 to 2002, 64.4% of all cases were autochthonous, 6.5% imported from Turkey and 11.5% from Morocco.
- The disease incidence among children of Turkish and Moroccan descent declined from 70.3 per 100 000 in 2000, to 13.5 per 100 000 in 2005
- During 1992 to 2006, 1,697 cases were reported among MSM visiting STD clinics (mean rate 97 per 100,000 population)

Prevalence surveys:
1.1% of dates and 0% of fig samples (viral RNA, 2011 publication)

Seroprevalence surveys:
33.8% of the general population – including (age group 15 to 49 years) 90.9% of Turks, 95.8% of Moroccans, 20.1% of native Dutch and 25% of other Western people (2000 publication)
34% of the general population during 1995 to 1996; 39% during 2006 to 2007
41% of blood donors and 33.8% of the general population (1995 to 1996)
less than 10% below age 35; 25% at 35 years; 85% at 79 years

Notable outbreaks:
1977 – An outbreak (20 cases) in Amsterdam was caused by contaminated meat sold at a butcher shop.
1991 to 1993 – An outbreak (37 cases) was reported among MSM in Amsterdam.
1996 – An outbreak (41 cases) was reported in Heerlen.
1998 – An outbreak in Rotterdam was associated with MSM who frequented ‘gay bars.’
1999 – An outbreak (11 cases or more) in Nijmengen involved two schools and a nursery.
2004 – An outbreak (351 cases) was caused by contaminated orange juice served to tourists at a hotel in Egypt. 271 primary (and 7 secondary) cases were reported among Germans, 18 primary (13 secondary – from a food handler) cases Austrians, 10 Swedes, 9 Danes, 9 Dutch, 6 Belgian, 5 British, 2 Italian and 1 Swiss.
2004 – An outbreak (30 cases) was reported among homeless and drug users in Rotterdam.
2005 to 2006 – An outbreak (30 cases) was reported among elementary school children in Noord-Kennemerland region.
2009 to 2010 – An outbreak (11 cases) was associated with consumption of semi-dried tomatoes.

References:
1. Gideon graph tool at http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps
2. Berger SA. Infectious Diseases of the Netherlands, 2012. 502 pp, 144 graphs, 2,091 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-the-netherlands/
3. Berger SA. Hepatitis A: Global Status, 2012. 166 pp, 180 graphs, 1,180 references. Gideon e-books, http://www.gideononline.com/ebooks/disease/hepatitis-a-global-status/

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Syphils vs. AIDS in Canada

Friday, February 10th, 2012

As in several other countries, including the United States, rates of syphilis in Canada decreased and later “rebounded” in parallel with an initial explosion and later decline in AIDS reporting. [1, 2] See graph [3]:

References:
1. Berger SA. Infectious Diseases of Canada, 2012. 496 pp, 107 graphs, 3106 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-canada/
2. Berger SA. Syphilis: Global Status, 2012. 238 pp, 339 graphs, 970 references. Gideon e-books, http://www.gideononline.com/ebooks/disease/syphilis-global-status/
3. Gideon graph tool at http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps

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Cryptosporidiosis in Australia

Sunday, February 5th, 2012

The following background data on Cryptosporidiosis in Australia are abstracted from Gideon www.GideonOnline.com and the Gideon e-book series. [1,2] :

Rates of Cryptosporidiosis in Australia are somewhat higher than those in New Zealand, and 7- to 8-fold those reported in the United States. (see graph) [3]

Infecting species:
- Sporadic cases of cryptosporidiosis are caused by Cryptosporidium hominis, C. parvum, C. andersoni and C. fayeri
- Cryptosporidium parvum has been detected in the Sydney water supply since 1998.
- Cryptosporidium canis has been recovered from dogs, and C. felis from cats – neither posing a significant public health risk to humans.
- Cryptosporidium sp. have been recovered from urban-adapted Common brushtail possums (Trichosurus vulpecula) and barramundi (Lates calcarifer)
- Cryptosporidium cuniculus has been identified in rabbits.
- Cryptosporidium fayeri, a species associated with marsupials, has been identified in a case of human infection.

Prevalence surveys:
2.2% of HIV-positive MSM, 0.6% of HIV-negative MSM and 3% of controls (Sydney, 2003 to 2006)
0.8% of stool samples from symptomatic and asymptomatic subjects (Sydney, 2008 to 2009)
24.5% of pre-weaned sheep (Western Australia, 2009 publication)
22.3% of pre-weaned calves (Western Australia and New South Wales, 2010 publication)
58.5% of dairy and beef calves with diarrhea (Cryptosporidium spp., 2011 publication)
8.5% of fecal samples from animals living in Sydney water catchments (Cryptosporidium spp., 2011 publication)
71.4% to 81.3% of fecal samples from lambs in southern Western Australia (2011 publication)
9.3% of western grey kangaroos (Macropus fuliginosus) in Western Australia – 25% of these identified as Cryptosporidium fayeri (2011 publication)

Notable outbreaks:
1991 (publication year) – An outbreak of cryptosporidiosis was reported among children in Adelaide.
1994 to 1995 – Outbreaks (70 cases) were reported in the Sutherland area of Sydney during September 1994 to January 1995 – 17 of these acquired from a swimming pool.
1998 – An outbreak (161 cases confirmed) was reported in The Australian Capital Territory – 60% related to two public swimming pools.
1998 – Outbreaks related to swimming pools was reported in Brisbane, Sydney and Melbourne.
2001 – An outbreak (47 cases) in Tasmania was ascribed to animal contact at an agricultural show.
2002 (publication year) – An outbreak was associated with drinking unpasteurized milk.
2005 – Outbreaks (180 cases, approximate) were associated with swimming pools in New South Wales.
2008 – An outbreak in Sydney was associated with a swimming pool.
2009 – An outbreak (1,141 cases) was associated with swimming pools in New South Wales.
2009 – An outbreak (628 cases during January to March) was reported in Sydney.

References:
1. Berger SA. Infectious Diseases of Australia, 2012. 515 pp, 160 graphs, 2930 references, http://www.gideononline.com/ebooks/country/infectious-diseases-of-australia/
2. Berger SA. Cryptosporidiosis: Global Status, 2012. 77 pp, 47 graphs, 995 references. Gideon e-book series, http://www.gideononline.com/ebooks/disease/cryptosporidiosis-global-status/
3. See Gideon graph tool at http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps

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Trypanosomiasis in Kenya

Thursday, February 2nd, 2012

Rates of human Trypanosomiasis in Kenya are relatively low in contrast to surrounding countries – see graphs [1].


Although both disease incidence and rates per 100,000 are highest in Uganda and Sudan, most cases affecting tourists have been acquired in Tanzania.

The following background data on Trypanosomiasis in Kenya are abstracted from Gideon www.GideonOnline.com and the Gideon e-book series [2,3] (Primary references available on request)

Time and Place:
- African sleeping sickness first entered Kenya from Uganda in 1901.
- By 1965 Gambian sleeping sickness had virtually disappeared from Kenya, and was replaced by Rhodesian sleeping sickness.
- The disease is reported from the western region, and is relatively common in the Lambwe Valley, Nyanza region.
- As of 2004, endemic areas consisted of Bungoma, Busia and Teso districts (Ugandan border area).
– 912 cases of sleeping sickness were reported in the Lambwe Valley during 1959 to 1984

700,000 persons are considered at risk.

In one study, 100% of trypanosomiasis patients were found to be co-infected with malaria, 64.5% with helminthosis, 22.5% typhoid, 16.1% urinary tract infections, 12.9% HIV and 3.2% tuberculosis (2000 to 2009).

Exported cases:
1991 – An American national acquired trypanosomiasis following travel through Tanzania, Kenya and Rwanda.
1996 – A Mexican tourist acquired trypanosomiasis in Kenya.

The endemic species is Trypanosoma brucei rhodesiense.

The local vectors are Glossina pallidipes, G. swynnertoni and G. fuscipes ssp. fuscipes.

Trypanosoma brucei was detected in horses on a farm in Thika (1994 publication)

Prevalence surveys:
2.5% of domestic dogs in Busia and Teso Districts (2003 publication)
1% of livestock in Busia District (2011 publication)

Notable outbreaks:
1964 – An outbreak of African trypanosomiasis was reported in Alego, Central Nyanza, in 1964.
1980 to 1984 – An outbreak of African trypanosomiasis was reported in the Lambwe Valley.

References:
1. Gideon graph tool at http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps
2. Berger SA. Infectious Diseases of Kenya, 2012. 404 pp, 61 graphs, 1741 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-kenya/
3. Berger SA. African Trypanosomiasis: Global Status, 2012. 53 pp, 37 graphs, 567 references. Gideon e-books, http://www.gideononline.com/ebooks/disease/african-trypanosomiasis-global-status/

Lyme Disease in the United Kingdom

Saturday, January 28th, 2012

The incidence of Lyme disease has been increasing in the United Kingdom since reporting began, with highest rates in Scotland. In the following graph I’ve contrasted these rates with those of the Uhnited States. [1]

Reference:
1. Gideon graph tool at http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps

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Leprosy in India

Thursday, January 26th, 2012

Southeast Asia continues to account for the most of the global leprosy burden, with more than 50% of the world’s cases reported from India. In the following graph, I’ve compared regional data with those of India. [1]

References:
1. Graph tutorial at: http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps

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H5N1 Influenza – Graphic Summary Through 2011

Sunday, January 22nd, 2012

As of December 2011, most cases of human infection by H5N1 Influenza virus were reported in Cambodia, China, Egypt, Indonesia, Thailand and Vietnam. In the following graph [1], note that successive peaks were reported by Vietnam and Indonesia, followed by increasing activity in Egypt during recent years.

The second graph [1] illustrates the fact that a disproportionately high case fatality rate has been reported among cases occurring in Indonesia.

References:
1. Graph tutorial at: http://www.GIDEONonline.com/wp/wp-content/uploads/Gideon-Graphs.pps

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Toxoplasmosis in Australia and New Zealand

Thursday, January 5th, 2012

The following background notes on toxoplasmosis in Australia and New Zealand are abstracted from Gideon www.GideonOnline.com and the Gideon e-book series. [1-3]

Australia:
An estimated 520 to 650 babies are born with congenital toxoplasmosis each year.

Prevalence surveys:
3.7% of encephalitis cases in Australia (221 cases reported, 1990 to 2007)

Seroprevalence surveys:
35% of pregnant women in Western Australia; 23% to 45% in Melbourne; 23% in South Australia; 26% in Queensland
50% of feral cats in Tasmania (1997 publication)
67% of captive common brushtail possums (Trichosurus vulpecula, 2008 publication)
15.5% of Western grey kangaroos in the Perth region (2009 publication)
5% of wild brush-tailed rock-wallaby populations in southeast Queensland (2010 publication)
0% of Australian fur seals (Arctocephalus pusillus doriferus, 2007 to 2009)

Cases of human infection have been ascribed to ingestion of poorly-cooked kangaroo meat.

High abortion rates are reported among pregnant Tasmanian ewes, which are infected through ingestion of cat feces.
- Toxoplasmosis has been demonstrated among humpbacked dolphins (Sousa chinensis) stranded in Queensland; and in common wombats (Vombatus ursinus)
- Toxoplasmosis has been reported in kakariki (Cyanoramphus spp.)

Notable outbreaks:
1984 (publication year) – An outbreak (5 cases) of toxoplasmosis among members of a Lebanese family in Australia was ascribed to contaminated Kibbi (a traditional meat dish)

New Zealand:
164 primary maternal infections are estimated annually, with resultant infection of 66 fetuses.
– The maternal seroconversion rate is 0.62% per year.

Seroprevalence surveys:
33% of pregnant women in Auckland (IgG, 2000)
42.9% of healthy blood donors in Waikato (2007 publication)
85% of ewes (2006 to 2009)

Toxoplasmosis has been documented in wallabies (Macropus eugenii, Macropus rufogriseus) exported to the United States from New Zealand.

References:
1. Berger SA. Infectious Diseases of Australia, 2011. 503 pp, 158 graphs, 2460 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-australia/
2. Berger SA. Infectious Diseases of New Zealand, 2011. 399 pp, 132 graphs, 1199 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-new-zealand/
3. Berger SA. Toxoplasmosis: Global Status, 2011. 92 pp, 74 graphs, 950 references. http://www.gideononline.com/ebooks/disease/toxoplasmosis-global-status/

Botulism in Germany

Sunday, January 1st, 2012

Rates of botulism in Germany have changed little since the 1980′s – as depicted in the following graph: [1, 2].

Of historic interest, the world’s first botulism outbreak was reported in this country. In 1793, thirteen residents of Wildbad acquired the disease from tainted sausage – thus the term “botulism” (Latin, botulus = sausage). [1,2]

References:
1. Berger S. Infectious Diseases of Germany, 2011. 488 pp, 145 graphs, 1906 references. Gideon e-books, http://www.gideononline.com/ebooks/country/infectious-diseases-of-germany/
2. Berger S. Botulism: Global Status, 2011. 80 pp, 86 graphs, 510 references. Gideon e-books, http://www.gideononline.com/ebooks/disease/botulism-global-status/